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<h1 align="center"><font color="#ffffff">Shorewall News Archive</font></h1>
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</table>
<p><b>7/7/2003 - Shorewall-1.4.6 Beta 2</b></p>
<p><b>Problems Corrected:</b><br>
</p>
<ol>
<li>A problem seen on RH7.3 systems where Shorewall encountered start errors
when started using the "service" mechanism has been worked around.<br>
<br>
</li>
<li>Where a list of IP addresses appears in the DEST column of a DNAT[-]
rule, Shorewall incorrectly created multiple DNAT rules in the nat table
(one for each element in the list). Shorewall now correctly creates a single
DNAT rule with multiple "--to-destination" clauses.<br>
<br>
</li>
<li>Corrected a problem in Beta 1 where DNS names containing a "-" were
mis-handled when they appeared in the DEST column of a rule.<br>
</li>
</ol>
<p><b>Migration Issues:</b><br>
</p>
<ol>
<li>In earlier versions, an undocumented feature allowed entries in the
host file as follows:<br>
<br>
<EFBFBD> <20> z<><7A><EFBFBD> eth1:192.168.1.0/24,eth2:192.168.2.0/24<br>
<br>
This capability was never documented and has been removed in 1.4.6 to allow
entries of the following format:<br>
<br>
<EFBFBD> <20> z<><7A> eth1:192.168.1.0/24,192.168.2.0/24<br>
<br>
</li>
<li>The NAT_ENABLED, MANGLE_ENABLED and MULTIPORT options have been removed
from /etc/shorewall/shorewall.conf. These capabilities are now automatically
detected by Shorewall (see below).<br>
</li>
</ol>
<p><b>New Features:</b><br>
</p>
<ol>
<li>A 'newnotsyn' interface option has been added. This option may be specified
in /etc/shorewall/interfaces and overrides the setting NEWNOTSYN=No for packets
arriving on the associated interface.<br>
<br>
</li>
<li>The means for specifying a range of IP addresses in /etc/shorewall/masq
to use for SNAT is now documented. ADD_SNAT_ALIASES=Yes is enabled for address
ranges.<br>
<br>
</li>
<li>Shorewall can now add IP addresses to subnets other than the first
one on an interface.<br>
<br>
</li>
<li>DNAT[-] rules may now be used to load balance (round-robin) over a
set of servers. Servers may be specified in a range of addresses given
as &lt;first address&gt;-&lt;last address&gt;.<br>
<br>
Example:<br>
<br>
<20> <20> DNAT net loc:192.168.10.2-192.168.10.5 tcp 80<br>
<br>
</li>
<li>The NAT_ENABLED, MANGLE_ENABLED and MULTIPORT configuration options
have been removed and have been replaced by code that detects whether these
capabilities are present in the current kernel. The output of the start,
restart and check commands have been enhanced to report the outcome:<br>
<br>
Shorewall has detected the following iptables/netfilter capabilities:<br>
<20> <20>NAT: Available<br>
<20> <20>Packet Mangling: Available<br>
<20> <20>Multi-port Match: Available<br>
Verifying Configuration...<br>
<br>
</li>
<li>Support for the Connection Tracking Match Extension has been added.
This extension is available in recent kernel/iptables releases and allows
for rules which match against elements in netfilter's connection tracking
table. Shorewall automatically detects the availability of this extension
and reports its availability in the output of the start, restart and check
commands.<br>
<br>
Shorewall has detected the following iptables/netfilter capabilities:<br>
<20> <20>NAT: Available<br>
<20> <20>Packet Mangling: Available<br>
<20> <20>Multi-port Match: Available<br>
<20> <20>Connection Tracking Match: Available<br>
Verifying Configuration...<br>
<br>
If this extension is available, the ruleset generated by Shorewall is changed
in the following ways:</li>
<ul>
<li>To handle 'norfc1918' filtering, Shorewall will not create chains
in the mangle table but will rather do all 'norfc1918' filtering in the
filter table (rfc1918 chain).</li>
<li>Recall that Shorewall DNAT rules generate two netfilter rules; one
in the nat table and one in the filter table. If the Connection Tracking
Match Extension is available, the rule in the filter table is extended to
check that the original destination address was the same as specified (or
defaulted to) in the DNAT rule.<br>
<br>
</li>
</ul>
<li>The shell used to interpret the firewall script (/usr/share/shorewall/firewall)
may now be specified using the SHOREWALL_SHELL parameter in shorewall.conf.<br>
<br>
</li>
<li>An 'ipcalc' command has been added to /sbin/shorewall.<br>
<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ipcalc [ &lt;address&gt; &lt;netmask&gt; | &lt;address&gt;/&lt;vlsm&gt;
]<br>
<br>
Examples:<br>
<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@wookie root]# shorewall ipcalc 192.168.1.0/24<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> CIDR=192.168.1.0/24<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NETMASK=255.255.255.0<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NETWORK=192.168.1.0<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> BROADCAST=192.168.1.255<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@wookie root]#<br>
<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@wookie root]# shorewall ipcalc 192.168.1.0 255.255.255.0<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> CIDR=192.168.1.0/24<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NETMASK=255.255.255.0<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NETWORK=192.168.1.0<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> BROADCAST=192.168.1.255<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@wookie root]#<br>
<br>
Warning:<br>
<br>
If your shell only supports 32-bit signed arithmatic (ash or dash), then
the ipcalc command produces incorrect information for IP addresses 128.0.0.0-1
and for /1 networks. Bash should produce correct information for all valid
IP addresses.<br>
<br>
</li>
<li>An 'iprange' command has been added to /sbin/shorewall. <br>
<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> iprange &lt;address&gt;-&lt;address&gt;<br>
<br>
This command decomposes a range of IP addressses into a list of network and
host addresses. The command can be useful if you need to construct an efficient
set of rules that accept connections from a range of network addresses.<br>
<br>
Note: If your shell only supports 32-bit signed arithmetic (ash or dash)
then the range may not span 128.0.0.0.<br>
<br>
Example:<br>
<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@gateway root]# shorewall iprange 192.168.1.4-192.168.12.9<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.4/30<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.8/29<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.16/28<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.32/27<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.64/26<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.128/25<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.2.0/23<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.4.0/22<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.8.0/22<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.12.0/29<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.12.8/31<br>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> [root@gateway root]#<br>
<br>
</li>
<li>A list of host/net addresses is now allowed in an entry in /etc/shorewall/hosts.<br>
<br>
Example:<br>
<br>
<EFBFBD><EFBFBD><EFBFBD> foo<6F><6F><EFBFBD> eth1:192.168.1.0/24,192.168.2.0/24<br>
<br>
</li>
</ol>
<p><b>7/4/2003 - Shorewall-1.4.6 Beta 1</b></p>
<p><b>Problems Corrected:</b><br>
</p>
<ol>
<li>A problem seen on RH7.3 systems where Shorewall encountered start
errors when started using the "service" mechanism has been worked around.<br>
<br>
</li>
<li>Where a list of IP addresses appears in the DEST column of a DNAT[-]
rule, Shorewall incorrectly created multiple DNAT rules in the nat table
(one for each element in the list). Shorewall now correctly creates a single
DNAT rule with multiple "--to-destination" clauses.<br>
</li>
</ol>
<p><b>New Features:</b><br>
</p>
<ol>
<li>A 'newnotsyn' interface option has been added. This option may be
specified in /etc/shorewall/interfaces and overrides the setting NEWNOTSYN=No
for packets arriving on the associated interface.<br>
<br>
</li>
<li>The means for specifying a range of IP addresses in /etc/shorewall/masq
to use for SNAT is now documented. ADD_SNAT_ALIASES=Yes is enabled for address
ranges.<br>
<br>
</li>
<li>Shorewall can now add IP addresses to subnets other than the first
one on an interface.<br>
<br>
</li>
<li>DNAT[-] rules may now be used to load balance (round-robin) over
a set of servers. Up to 256 servers may be specified in a range of addresses
given as &lt;first address&gt;-&lt;last address&gt;.<br>
<br>
Example:<br>
<br>
<20> <20> DNAT net loc:192.168.10.2-192.168.10.5 tcp 80<br>
<br>
Note that this capability has previously been available using a combination
of a DNAT- rule and one or more ACCEPT rules. That technique is still preferable
for load-balancing over a large number of servers (&gt; 16) since specifying
a range in the DNAT rule causes one filter table ACCEPT rule to be generated
for each IP address in the range.<br>
<br>
</li>
<li>The NAT_ENABLED, MANGLE_ENABLED and MULTIPORT configuration options
have been removed and have been replaced by code that detects whether these
capabilities are present in the current kernel. The output of the start,
restart and check commands have been enhanced to report the outcome:<br>
<br>
Shorewall has detected the following iptables/netfilter capabilities:<br>
<20> <20>NAT: Available<br>
<20> <20>Packet Mangling: Available<br>
<20> <20>Multi-port Match: Available<br>
Verifying Configuration...<br>
<br>
</li>
<li>Support for the Connection Tracking Match Extension has been added.
This extension is available in recent kernel/iptables releases and allows
for rules which match against elements in netfilter's connection tracking
table. Shorewall automatically detects the availability of this extension
and reports its availability in the output of the start, restart and check
commands.<br>
<br>
Shorewall has detected the following iptables/netfilter capabilities:<br>
<20> <20>NAT: Available<br>
<20> <20>Packet Mangling: Available<br>
<20> <20>Multi-port Match: Available<br>
<20> <20>Connection Tracking Match: Available<br>
Verifying Configuration...<br>
<br>
If this extension is available, the ruleset generated by Shorewall is changed
in the following ways:</li>
<ol>
</ol>
<ul>
<li>To handle 'norfc1918' filtering, Shorewall will not create chains
in the mangle table but will rather do all 'norfc1918' filtering in the
filter table (rfc1918 chain).</li>
<li>Recall that Shorewall DNAT rules generate two netfilter rules;
one in the nat table and one in the filter table. If the Connection Tracking
Match Extension is available, the rule in the filter table is extended to
check that the original destination address was the same as specified (or
defaulted to) in the DNAT rule.<br>
<br>
</li>
</ul>
<li>The shell used to interpret the firewall script (/usr/share/shorewall/firewall)
may now be specified using the SHOREWALL_SHELL parameter in shorewall.conf.<br>
</li>
</ol>
<p><b>6/17/2003 - Shorewall-1.4.5</b></p>
<p>Problems Corrected:<br>
</p>
<ol>
<li>The command "shorewall debug try &lt;directory&gt;" now correctly
traces the attempt.</li>
<li>The INCLUDE directive now works properly in the zones file; previously,
INCLUDE in that file was ignored.</li>
<li>/etc/shorewall/routestopped records with an empty second column
are no longer ignored.<br>
</li>
</ol>
<p>New Features:<br>
</p>
<ol>
<li>The ORIGINAL DEST column in a DNAT[-] or REDIRECT[-] rule may now
contain a list of addresses. If the list begins with "!' then the rule will
take effect only if the original destination address in the connection request
does not match any of the addresses listed.</li>
</ol>
<p><b>6/15/2003 - Shorewall, Kernel 2.4.21 and iptables 1.2.8</b></p>
<p>The firewall at shorewall.net has been upgraded to the 2.4.21 kernel and
iptables 1.2.8 (using the "official" RPM from netfilter.org). No problems
have been encountered with this set of software. The Shorewall version
is 1.4.4b plus the accumulated changes for 1.4.5.<br>
</p>
<p><b>6/8/2003 - Updated Samples</b></p>
<p>Thanks to Francesca Smith, the samples have been updated to Shorewall version
1.4.4.</p>
<p><b>5/29/2003 - Shorewall-1.4.4b</b></p>
<p>Groan -- This version corrects a problem whereby the --log-level was not
being set when logging via syslog. The most commonly reported symptom
was that Shorewall messages were being written to the console even though
console logging was correctly configured per FAQ 16.<br>
</p>
<p><b>5/27/2003 - Shorewall-1.4.4a</b></p>
The Fireparse --log-prefix fiasco continues. Tuomo Soini has pointed
out that the code in 1.4.4 restricts the length of short zone names to
4 characters. I've produced version 1.4.4a that restores the previous 5-character
limit by conditionally omitting the log rule number when the LOGFORMAT
doesn't contain '%d'. <br>
<p><b>5/23/2003 - Shorewall-1.4.4</b></p>
I apologize for the rapid-fire releases but since there is a potential
configuration change required to go from 1.4.3a to 1.4.4, I decided
to make it a full release rather than just a bug-fix release. <br>
<br>
<b><EFBFBD><EFBFBD><EFBFBD> Problems corrected:</b><br>
<blockquote>None.<br>
</blockquote>
<b><EFBFBD><EFBFBD><EFBFBD> New Features:<br>
</b>
<ol>
<li>A REDIRECT- rule target has been added. This target behaves
for REDIRECT in the same way as DNAT- does for DNAT in that the Netfilter
nat table REDIRECT rule is added but not the companion filter table ACCEPT
rule.<br>
<br>
</li>
<li>The LOGMARKER variable has been renamed LOGFORMAT and has
been changed to a 'printf' formatting template which accepts three arguments
(the chain name, logging rule number and the disposition). To use LOGFORMAT
with fireparse (<a href="http://www.fireparse.com">http://www.fireparse.com</a>),
set it as:<br>
<20><br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> LOGFORMAT="fp=%s:%d a=%s "<br>
<20><br>
<b>CAUTION: </b>/sbin/shorewall uses the leading part of the
LOGFORMAT string (up to but not including the first '%') to find log
messages in the 'show log', 'status' and 'hits' commands. This part should
not be omitted (the LOGFORMAT should not begin with "%") and the leading
part should be sufficiently unique for /sbin/shorewall to identify Shorewall
messages.<br>
<br>
</li>
<li>When logging is specified on a DNAT[-] or REDIRECT[-] rule,
the logging now takes place in the nat table rather than in the filter
table. This way, only those connections that actually undergo DNAT or
redirection will be logged.<br>
</li>
</ol>
<p><b>5/20/2003 - Shorewall-1.4.3a</b><b> </b><b> </b><br>
</p>
This version primarily corrects the documentation included in
the .tgz and in the .rpm. In addition: <br>
<ol>
<li>(This change is in 1.4.3 but is not documented) If you
are running iptables 1.2.7a and kernel 2.4.20, then Shorewall will return
reject replies as follows:<br>
<20><> a) tcp - RST<br>
<20><> b) udp - ICMP port unreachable<br>
<20><> c) icmp - ICMP host unreachable<br>
<20><> d) Otherwise - ICMP host prohibited<br>
If you are running earlier software, Shorewall will follow it's
traditional convention:<br>
<20><> a) tcp - RST<br>
<20><> b) Otherwise - ICMP port unreachable</li>
<li>UDP port 135 is now silently dropped in the common.def
chain. Remember that this chain is traversed just before a DROP or
REJECT policy is enforced.<br>
</li>
</ol>
<p><b>5/18/2003 - Shorewall 1.4.3</b><b> </b><br>
</p>
<20><><EFBFBD> <b>Problems Corrected:<br>
</b>
<ol>
<li>There were several cases where Shorewall would fail to
remove a temporary directory from /tmp. These cases have been corrected.</li>
<li>The rules for allowing all traffic via the loopback interface
have been moved to before the rule that drops status=INVALID packets.
This insures that all loopback traffic is allowed even if Netfilter
connection tracking is confused.</li>
</ol>
<20><><EFBFBD> <b>New Features:<br>
</b>
<ol>
<li><EFBFBD>IPV6-IPV4 (6to4) tunnels are now supported in the /etc/shorewall/tunnels
file.</li>
<li value="2">You may now change the leading portion of the
--log-prefix used by Shorewall using the LOGMARKER variable in shorewall.conf.
By default, "Shorewall:" is used.<br>
</li>
</ol>
<p><b>5/10/2003 - Shorewall Mirror in Asia<br>
</b></p>
<p>Ed Greshko has established a mirror in Taiwan -- Thanks Ed!<br>
</p>
<p><b>5/8/2003 - Shorewall Mirror in Chile</b></p>
Thanks to Darcy Ganga, there is now an HTTP mirror
in Santiago Chile.
<p><b>4/21/2003 - Samples updated for Shorewall version 1.4.2</b></p>
<p>Thanks to Francesca Smith, the sample configurations are now upgraded
to Shorewall version 1.4.2.</p>
<p><b>4/9/2003 - Shorewall 1.4.2</b><br>
</p>
<p><b><EFBFBD><EFBFBD><EFBFBD> Problems Corrected:</b></p>
<blockquote>
<ol>
<li>TCP connection requests rejected out of the <b>common</b>
chain are now properly rejected with TCP RST; previously, some of
these requests were rejected with an ICMP port-unreachable response.</li>
<li>'traceroute -I' from behind the firewall previously
timed out on the first hop (e.g., to the firewall). This has been
worked around.</li>
</ol>
</blockquote>
<p><b><EFBFBD><EFBFBD><EFBFBD> New Features:</b></p>
<ol>
<li>Where an entry in the/etc/shorewall/hosts file specifies
a particular host or network, Shorewall now creates an intermediate
chain for handling input from the related zone. This can substantially
reduce the number of rules traversed by connections requests from such
zones.<br>
<br>
</li>
<li>Any file may include an INCLUDE directive. An INCLUDE
directive consists of the word INCLUDE followed by a file name and
causes the contents of the named file to be logically included into
the file containing the INCLUDE. File names given in an INCLUDE directive
are assumed to reside in /etc/shorewall or in an alternate configuration
directory if one has been specified for the command. <br>
<20><br>
<20><> Examples:<br>
<20><> shorewall/params.mgmt:<br>
<20><> MGMT_SERVERS=1.1.1.1,2.2.2.2,3.3.3.3<br>
<20><> TIME_SERVERS=4.4.4.4<br>
<20><> BACKUP_SERVERS=5.5.5.5<br>
<20><> ----- end params.mgmt -----<br>
<20><br>
<20><br>
<20><> shorewall/params:<br>
<20><> # Shorewall 1.3 /etc/shorewall/params<br>
<20><> [..]<br>
<20><> #######################################<br>
<20> <br>
<20> <20>INCLUDE params.mgmt<6D><74><EFBFBD> <br>
<20> <br>
<20><> # params unique to this host here<br>
<20><> #LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO
NOT REMOVE<br>
<20><> ----- end params -----<br>
<20><br>
<20><br>
<20><> shorewall/rules.mgmt:<br>
<20><> ACCEPT net:$MGMT_SERVERS<52><53><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> $FW<46><57><EFBFBD> tcp<63><70><EFBFBD> 22<br>
<20><> ACCEPT $FW<46><57><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> net:$TIME_SERVERS<52><53><EFBFBD> udp<64><70><EFBFBD> 123<br>
<20><> ACCEPT $FW<46><57><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> net:$BACKUP_SERVERS<52> tcp<63><70><EFBFBD> 22<br>
<20><> ----- end rules.mgmt -----<br>
<20><br>
<20><> shorewall/rules:<br>
<20><> # Shorewall version 1.3 - Rules File<br>
<20><> [..]<br>
<20><> #######################################<br>
<20><br>
<20><> INCLUDE rules.mgmt<6D><74><EFBFBD><EFBFBD> <br>
<20> <br>
<20><> # rules unique to this host here<br>
<20><> #LAST LINE -- ADD YOUR ENTRIES BEFORE THIS ONE --
DO NOT REMOVE<br>
<20><> ----- end rules -----<br>
<20><br>
INCLUDE's may be nested to a level of 3 -- further nested
INCLUDE directives are ignored with a warning message.<br>
<br>
</li>
<li>Routing traffic from an interface back out that interface
continues to be a problem. While I firmly believe that this should
never happen, people continue to want to do it. To limit the damage
that such nonsense produces, I have added a new 'routeback' option in
/etc/shorewall/interfaces and /etc/shorewall/hosts. When used in /etc/shorewall/interfaces,
the 'ZONE' column may not contain '-'; in other words, 'routeback'
can't be used as an option for a multi-zone interface. The 'routeback'
option CAN be specified however on individual group entries in /etc/shorewall/hosts.<br>
<20><br>
The 'routeback' option is similar to the old 'multi'
option with two exceptions:<br>
<20><br>
<20><> a) The option pertains to a particular zone,interface,address
tuple.<br>
<20><br>
<20><> b) The option only created infrastructure to pass
traffic from (zone,interface,address) tuples back to themselves
(the 'multi' option affected all (zone,interface,address) tuples
associated with the given 'interface').<br>
<20><br>
See the '<a href="upgrade_issues.htm">Upgrade Issues</a>'
for information about how this new option may affect your configuration.<br>
</li>
</ol>
<p><b>3/24/2003 - Shorewall 1.4.1</b><b> </b></p>
<b> </b>
<p>This release follows up on 1.4.0. It corrects a problem introduced in 1.4.0
and removes additional warts.<br>
<br>
<b>Problems Corrected:</b><br>
</p>
<ol>
<li>When Shorewall 1.4.0 is run under the ash shell
(such as on Bering/LEAF), it can attempt to add ECN disabling rules
even if the /etc/shorewall/ecn file is empty. That problem has been
corrected so that ECN disabling rules are only added if there are
entries in /etc/shorewall/ecn.</li>
</ol>
<b>New Features:</b><br>
<blockquote>Note: In the list that follows, the term <i>group </i>refers
to a particular network or subnetwork (which may be 0.0.0.0/0 or it may be
a host address) accessed through a particular interface. Examples:<br>
<blockquote>eth0:0.0.0.0/0<br>
eth2:192.168.1.0/24<br>
eth3:192.0.2.123<br>
</blockquote>
You can use the "shorewall check" command to see the
groups associated with each of your zones.<br>
</blockquote>
<ol>
<li>Beginning with Shorewall 1.4.1, if a zone Z comprises
more than one group<i> </i>then if there is no explicit Z to Z policy
and there are no rules governing traffic from Z to Z then Shorewall
will permit all traffic between the groups in the zone.</li>
<li>Beginning with Shorewall 1.4.1, Shorewall will never
create rules to handle traffic from a group to itself.</li>
<li>A NONE policy is introduced in 1.4.1. When a policy
of NONE is specified from Z1 to Z2:</li>
</ol>
<ul>
<li>There may be no rules created that govern connections
from Z1 to Z2.</li>
<li>Shorewall will not create any infrastructure to
handle traffic from Z1 to Z2.</li>
</ul>
See the <a href="upgrade_issues.htm">upgrade issues</a>
for a discussion of how these changes may affect your configuration.
<p><b>3/17/2003 - Shorewall 1.4.0</b><b> </b></p>
Shorewall
1.4 represents the next step in the evolution of Shorewall.
The main thrust of the initial release is simply to remove the
cruft that has accumulated in Shorewall over time. <br>
<br>
<b>IMPORTANT: Shorewall 1.4.0 requires</b> <b>the
iproute package ('ip' utility).</b><br>
<br>
Function from 1.3 that has been omitted from
this version include:<br>
<ol>
<li>The MERGE_HOSTS variable in shorewall.conf
is no longer supported. Shorewall 1.4 behavior is the same as 1.3
with MERGE_HOSTS=Yes.<br>
<br>
</li>
<li>Interface names of the form &lt;device&gt;:&lt;integer&gt;
in /etc/shorewall/interfaces now generate an error.<br>
<br>
</li>
<li>Shorewall 1.4 implements behavior consistent
with OLD_PING_HANDLING=No. OLD_PING_HANDLING=Yes will generate
an error at startup as will specification of the 'noping' or
'filterping' interface options.<br>
<br>
</li>
<li>The 'routestopped' option in the /etc/shorewall/interfaces
and /etc/shorewall/hosts files is no longer supported and will
generate an error at startup if specified.<br>
<br>
</li>
<li>The Shorewall 1.2 syntax for DNAT and REDIRECT
rules is no longer accepted.<br>
<br>
</li>
<li>The ALLOWRELATED variable in shorewall.conf
is no longer supported. Shorewall 1.4 behavior is the same as
1.3 with ALLOWRELATED=Yes.<br>
<br>
</li>
<li>The icmp.def file has been removed.<br>
</li>
</ol>
Changes for 1.4 include:<br>
<ol>
<li>The /etc/shorewall/shorewall.conf file
has been completely reorganized into logical sections.<br>
<br>
</li>
<li>LOG is now a valid action for a rule (/etc/shorewall/rules).<br>
<br>
</li>
<li>The firewall script and version file are
now installed in /usr/share/shorewall.<br>
<br>
</li>
<li>Late arriving DNS replies are now silently
dropped in the common chain by default.<br>
<br>
</li>
<li>In addition to behaving like OLD_PING_HANDLING=No,
Shorewall 1.4 no longer unconditionally accepts outbound ICMP
packets. So if you want to 'ping' from the firewall, you will
need the appropriate rule or policy.<br>
<br>
</li>
<li>CONTINUE is now a valid action for a rule (/etc/shorewall/rules).<br>
<br>
</li>
<li>802.11b devices with names of the form wlan&lt;n&gt;
now support the 'maclist' option.<br>
<br>
</li>
<li>Explicit Congestion Notification (ECN - RFC 3168)
may now be turned off on a host or network basis using the new /etc/shorewall/ecn
file. To use this facility:<br>
<br>
<20><> a) You must be running kernel 2.4.20<br>
<20><> b) You must have applied the patch in<br>
<20><> http://www.shorewall/net/pub/shorewall/ecn/patch.<br>
<20><> c) You must have iptables 1.2.7a installed.<br>
<br>
</li>
<li>The /etc/shorewall/params file is now processed
first so that variables may be used in the /etc/shorewall/shorewall.conf
file.<br>
<br>
</li>
<li value="10">Shorewall now gives a more helpful
diagnostic when the 'ipchains' compatibility kernel module is loaded
and a 'shorewall start' command is issued.<br>
<br>
</li>
<li>The SHARED_DIR variable has been removed from
shorewall.conf. This variable was for use by package maintainers
and was not documented for general use.<br>
<br>
</li>
<li>Shorewall now ignores 'default' routes when detecting
masq'd networks.</li>
</ol>
<p><b>3/10/2003 - Shoreall 1.3.14a</b></p>
<p>A roleup of the following bug fixes and other updates:</p>
<ul>
<li>There is an updated rfc1918 file that reflects
the resent allocation of 222.0.0.0/8 and 223.0.0.0/8.</li>
</ul>
<ul>
<li>The documentation for the routestopped file claimed
that a comma-separated list could appear in the second column
while the code only supported a single host or network address.</li>
<li>Log messages produced by 'logunclean' and 'dropunclean'
were not rate-limited.</li>
<li>802.11b devices with names of the form <i>wlan</i>&lt;n&gt;
don't support the 'maclist' interface option.</li>
<li>Log messages generated by RFC 1918 filtering are
not rate limited.</li>
<li>The firewall fails to start in the case where you
have "eth0 eth1" in /etc/shorewall/masq and the default route is through
eth1</li>
</ul>
<p><b>2/8/2003 - Shoreawall 1.3.14</b></p>
<p>New features include</p>
<ol>
<li>An OLD_PING_HANDLING option has been
added to shorewall.conf. When set to Yes, Shorewall ping
handling is as it has always been (see http://www.shorewall.net/ping.html).<br>
<br>
When OLD_PING_HANDLING=No, icmp echo
(ping) is handled via rules and policies just like any other
connection request. The FORWARDPING=Yes option in shorewall.conf
and the 'noping' and 'filterping' options in /etc/shorewall/interfaces
will all generate an error.<br>
<br>
</li>
<li>It is now possible to direct Shorewall
to create a "label" such as<61> "eth0:0" for IP addresses that
it creates under ADD_IP_ALIASES=Yes and ADD_SNAT_ALIASES=Yes.
This is done by specifying the label instead of just the interface
name:<br>
<20><br>
<20><> a) In the INTERFACE column of /etc/shorewall/masq<br>
<20><> b) In the INTERFACE column of /etc/shorewall/nat<br>
<20></li>
<li>Support for OpenVPN Tunnels.<br>
<br>
</li>
<li>Support for VLAN devices with names
of the form $DEV.$VID (e.g., eth0.0)<br>
<br>
</li>
<li>In /etc/shorewall/tcrules, the MARK value
may be optionally followed by ":" and either 'F' or 'P' to designate
that the marking will occur in the FORWARD or PREROUTING chains
respectively. If this additional specification is omitted, the chain
used to mark packets will be determined by the setting of the MARK_IN_FORWARD_CHAIN
option in <a href="Documentation.htm#Conf">shorewall.conf</a>.<br>
<br>
</li>
<li>When an interface name is entered in
the SUBNET column of the /etc/shorewall/masq file, Shorewall
previously masqueraded traffic from only the first subnet
defined on that interface. It did not masquerade traffic from:<br>
<20><br>
<20><> a) The subnets associated with other
addresses on the interface.<br>
<20><> b) Subnets accessed through local
routers.<br>
<20><br>
Beginning with Shorewall 1.3.14, if
you enter an interface name in the SUBNET column, shorewall
will use the firewall's routing table to construct the masquerading/SNAT
rules.<br>
<20><br>
Example 1 -- This is how it works in
1.3.14.<br>
<20><> <br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br></pre>
<pre><EFBFBD> [root@gateway test]# shorewall start<br> ...<br> Masqueraded Subnets and Hosts:<br> To 0.0.0.0/0 from 192.168.1.0/24 through eth0 using 206.124.146.176<br> To 0.0.0.0/0 from 192.168.10.0/24 through eth0 using 206.124.146.176<br> Processing /etc/shorewall/tos...</pre>
<20><br>
When upgrading to Shorewall 1.3.14,
if you have multiple local subnets connected to an interface
that is specified in the SUBNET column of an /etc/shorewall/masq
entry, your /etc/shorewall/masq file will need changing. In
most cases, you will simply be able to remove redundant entries. In
some cases though, you might want to change from using the interface
name to listing specific subnetworks if the change described above will
cause masquerading to occur on subnetworks that you don't wish to masquerade.<br>
<20><br>
Example 2 -- Suppose that your current
config is as follows:<br>
<20><> <br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.10.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
<20><br>
<20><> In this case, the second entry in
/etc/shorewall/masq is no longer required.<br>
<20><br>
Example 3 -- What if your current configuration
is like this?<br>
<20><br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
<20><br>
<20><> In this case, you would want to change
the entry in<69> /etc/shorewall/masq to:<br>
<pre><EFBFBD><EFBFBD> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
</li>
</ol>
<p><br>
<b>2/5/2003 - Shorewall Support included
in Webmin 1.060</b></p>
<p>Webmin version 1.060 now has Shorewall support included as standard. See
<a href="http://www.webmin.com">http://www.webmin.com</a>.<br>
<b><br>
2/4/2003 - Shorewall 1.3.14-RC1</b></p>
<p>Includes the Beta 2 content plus support for OpenVPN tunnels.</p>
<p><b>1/28/2003 - Shorewall 1.3.14-Beta2</b></p>
<p>Includes the Beta 1 content plus restores VLAN device names of the form
$dev.$vid (e.g., eth0.1)</p>
<p><b>1/25/2003 - Shorewall 1.3.14-Beta1</b><br>
</p>
<p>The Beta includes the following changes:<br>
</p>
<ol>
<li>An OLD_PING_HANDLING option has
been added to shorewall.conf. When set to Yes, Shorewall
ping handling is as it has always been (see http://www.shorewall.net/ping.html).<br>
<br>
When OLD_PING_HANDLING=No, icmp echo
(ping) is handled via rules and policies just like any other
connection request. The FORWARDPING=Yes option in shorewall.conf
and the 'noping' and 'filterping' options in /etc/shorewall/interfaces
will all generate an error.<br>
<br>
</li>
<li>It is now possible to direct Shorewall
to create a "label" such as<61> "eth0:0" for IP addresses that
it creates under ADD_IP_ALIASES=Yes and ADD_SNAT_ALIASES=Yes.
This is done by specifying the label instead of just the interface
name:<br>
<20><br>
<20><> a) In the INTERFACE column of /etc/shorewall/masq<br>
<20><> b) In the INTERFACE column of /etc/shorewall/nat<br>
<20></li>
<li>When an interface name is entered
in the SUBNET column of the /etc/shorewall/masq file, Shorewall
previously masqueraded traffic from only the first subnet
defined on that interface. It did not masquerade traffic from:<br>
<20><br>
<20><> a) The subnets associated with other
addresses on the interface.<br>
<20><> b) Subnets accessed through local
routers.<br>
<20><br>
Beginning with Shorewall 1.3.14, if
you enter an interface name in the SUBNET column, shorewall
will use the firewall's routing table to construct the masquerading/SNAT
rules.<br>
<20><br>
Example 1 -- This is how it works in
1.3.14.<br>
<20><> <br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br></pre>
<pre><EFBFBD> [root@gateway test]# shorewall start<br> ...<br> Masqueraded Subnets and Hosts:<br> To 0.0.0.0/0 from 192.168.1.0/24 through eth0 using 206.124.146.176<br> To 0.0.0.0/0 from 192.168.10.0/24 through eth0 using 206.124.146.176<br> Processing /etc/shorewall/tos...</pre>
<20><br>
When upgrading to Shorewall 1.3.14,
if you have multiple local subnets connected to an interface
that is specified in the SUBNET column of an /etc/shorewall/masq
entry, your /etc/shorewall/masq file will need changing. In
most cases, you will simply be able to remove redundant entries. In
some cases though, you might want to change from using the interface
name to listing specific subnetworks if the change described above will
cause masquerading to occur on subnetworks that you don't wish to masquerade.<br>
<20><br>
Example 2 -- Suppose that your current
config is as follows:<br>
<20><> <br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.10.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
<20><br>
<20><> In this case, the second entry in
/etc/shorewall/masq is no longer required.<br>
<20><br>
Example 3 -- What if your current configuration
is like this?<br>
<20><br>
<pre><EFBFBD><EFBFBD> [root@gateway test]# cat /etc/shorewall/masq<br> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> eth2<68><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<pre><EFBFBD><EFBFBD> [root@gateway test]# ip route show dev eth2<br> 192.168.1.0/24<32> scope link<br> 192.168.10.0/24<32> proto kernel<65> scope link<6E> src 192.168.10.254<br> [root@gateway test]#</pre>
<20><br>
<20><> In this case, you would want to change
the entry in<69> /etc/shorewall/masq to:<br>
<pre><EFBFBD><EFBFBD> #INTERFACE<43><45><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> SUBNET<45><54><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ADDRESS<br> eth0<68><30><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 192.168.1.0/24<32><34><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 206.124.146.176<br> #LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</pre>
<b> </b></li>
</ol>
<p><b>1/18/2003 - Shorewall 1.3.13 Documentation in PDF Format</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.13 documenation.
the PDF may be downloaded from</p>
<20><><EFBFBD> <a href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/"
target="_self">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
<20><><EFBFBD> <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a>
<p><b>1/17/2003 - shorewall.net has MOVED</b><b><EFBFBD></b></p>
<p>Thanks to the generosity of Alex Martin and <a
href="http://www.rettc.com">Rett Consulting</a>, www.shorewall.net and
ftp.shorewall.net are now hosted on a system in Bellevue, Washington. A
big thanks to Alex for making this happen.<br>
</p>
<p><b>1/13/2003 - Shorewall 1.3.13<br>
</b></p>
<p>Just includes a few things that I had on the burner:<br>
</p>
<ol>
<li>A new 'DNAT-' action has been
added for entries in the /etc/shorewall/rules file. DNAT-
is intended for advanced users who wish to minimize the number
of rules that connection requests must traverse.<br>
<br>
A Shorewall DNAT rule actually generates
two iptables rules: a header rewriting rule in the 'nat'
table and an ACCEPT rule in the 'filter' table. A DNAT- rule
only generates the first of these rules. This is handy when you
have several DNAT rules that would generate the same ACCEPT rule.<br>
<br>
<20><> Here are three rules from my
previous rules file:<br>
<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DNAT<41><54> net<65> dmz:206.124.146.177
tcp smtp - 206.124.146.178<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DNAT<41><54> net<65> dmz:206.124.146.177
tcp smtp - 206.124.146.179<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ACCEPT net<65> dmz:206.124.146.177
tcp www,smtp,ftp,...<br>
<br>
<20><> These three rules ended up generating
_three_ copies of<br>
<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ACCEPT net<65> dmz:206.124.146.177
tcp smtp<br>
<br>
<20><> By writing the rules this way,
I end up with only one copy of the ACCEPT rule.<br>
<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DNAT-<2D> net<65> dmz:206.124.146.177
tcp smtp -<2D> 206.124.146.178<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> DNAT-<2D> net<65> dmz:206.124.146.177
tcp smtp -<2D> 206.124.146.179<br>
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ACCEPT net<65> dmz:206.124.146.177
tcp www,smtp,ftp,....<br>
<br>
</li>
<li>The 'shorewall check' command
now prints out the applicable policy between each pair
of zones.<br>
<br>
</li>
<li>A new CLEAR_TC option has
been added to shorewall.conf. If this option is set to
'No' then Shorewall won't clear the current traffic control
rules during [re]start. This setting is intended for use by
people that prefer to configure traffic shaping when the network
interfaces come up rather than when the firewall is started. If
that is what you want to do, set TC_ENABLED=Yes and CLEAR_TC=No
and do not supply an /etc/shorewall/tcstart file. That way, your
traffic shaping rules can still use the 'fwmark' classifier based
on packet marking defined in /etc/shorewall/tcrules.<br>
<br>
</li>
<li>A new SHARED_DIR variable
has been added that allows distribution packagers to easily
move the shared directory (default /usr/lib/shorewall). Users
should never have a need to change the value of this shorewall.conf
setting.<br>
</li>
</ol>
<p><b>1/6/2003 - <big><big><big>BURNOUT</big></big></big></b><b>
</b></p>
<p><b>Until further notice, I will not be involved in either Shorewall Development
or Shorewall Support</b></p>
<p><b>-Tom Eastep</b><br>
</p>
<p><b>12/30/2002 - Shorewall Documentation in PDF Format</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.12 documenation.
the PDF may be downloaded from</p>
<p><EFBFBD><EFBFBD><EFBFBD> <a href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/"
target="_self">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
<20><><EFBFBD> <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>12/27/2002 - Shorewall 1.3.12 Released</b></p>
<p> Features include:<br>
</p>
<ol>
<li>"shorewall refresh" now
reloads the traffic shaping rules (tcrules and tcstart).</li>
<li>"shorewall debug [re]start"
now turns off debugging after an error occurs. This
places the point of the failure near the end of the trace rather
than up in the middle of it.</li>
<li>"shorewall [re]start" has
been speeded up by more than 40% with my configuration.
Your milage may vary.</li>
<li>A "shorewall show classifiers"
command has been added which shows the current packet
classification filters. The output from this command is
also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all caps)
is now accepted as a valid syslog level and causes the
subject packets to be logged using the ULOG target rather
than the LOG target. This allows you to run ulogd (available
from <a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running a kernel
that has a FORWARD chain in the mangle table ("shorewall
show mangle" will show you the chains in the mangle table),
you can set MARK_IN_FORWARD_CHAIN=Yes in <a
href="Documentation.htm#Conf">shorewall.conf</a>. This allows for
marking input packets based on their destination even when
you are using Masquerading or SNAT.</li>
<li>I have cluttered up the
/etc/shorewall directory with empty 'init', 'start',
'stop' and 'stopped' files. If you already have a file with
one of these names, don't worry -- the upgrade process won't
overwrite your file.</li>
<li>I have added a new RFC1918_LOG_LEVEL
variable to <a href="Documentation.htm#Conf">shorewall.conf</a>.
This variable specifies the syslog level at which packets
are logged as a result of entries in the /etc/shorewall/rfc1918
file. Previously, these packets were always logged at the
'info' level.<br>
</li>
</ol>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 3<br>
</b></p>
This version corrects a problem
with Blacklist logging. In Beta 2, if BLACKLIST_LOG_LEVEL
was set to anything but ULOG, the firewall would fail to
start and "shorewall refresh" would also fail.<br>
<p><b>12/20/2002 - Shorewall 1.3.12 Beta 2</b></p>
<p>The first public Beta version of Shorewall 1.3.12 is now available (Beta
1 was made available only to a limited audience).<br>
</p>
Features include:<br>
<ol>
<li>"shorewall refresh"
now reloads the traffic shaping rules (tcrules and
tcstart).</li>
<li>"shorewall debug [re]start"
now turns off debugging after an error occurs. This
places the point of the failure near the end of the trace
rather than up in the middle of it.</li>
<li>"shorewall [re]start"
has been speeded up by more than 40% with my configuration.
Your milage may vary.</li>
<li>A "shorewall show
classifiers" command has been added which shows the
current packet classification filters. The output from this
command is also added as a separate page in "shorewall monitor"</li>
<li>ULOG (must be all
caps) is now accepted as a valid syslog level and causes
the subject packets to be logged using the ULOG target rather
than the LOG target. This allows you to run ulogd (available
from <a href="http://www.gnumonks.org/projects/ulogd">http://www.gnumonks.org/projects/ulogd</a>)
and log all Shorewall messages <a
href="shorewall_logging.html">to a separate log file</a>.</li>
<li>If you are running
a kernel that has a FORWARD chain in the mangle table
("shorewall show mangle" will show you the chains in the mangle
table), you can set MARK_IN_FORWARD_CHAIN=Yes in shorewall.conf.
This allows for marking input packets based on their destination
even when you are using Masquerading or SNAT.</li>
<li>I have cluttered up
the /etc/shorewall directory with empty 'init', 'start',
'stop' and 'stopped' files. If you already have a file with
one of these names, don't worry -- the upgrade process won't
overwrite your file.</li>
</ol>
You may download the Beta
from:<br>
<blockquote><a href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a><br>
<a
href="ftp://ftp.shorewall.net/pub/shorewall/Beta" target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a><br>
</blockquote>
<p><b>12/12/2002 - Mandrake Multi Network Firewall <a
href="http://www.mandrakesoft.com"><img src="images/logo2.png"
alt="Powered by Mandrake Linux" width="140" height="21" border="0">
</a></b></p>
Shorewall is at the center
of MandrakeSoft's recently-announced <a
href="http://www.mandrakestore.com/mdkinc/index.php?PAGE=tab_0/menu_0.php&amp;id_art=250&amp;LANG_=en#GOTO_250">Multi
Network Firewall (MNF)</a> product. Here is the
<a
href="http://www.mandrakesoft.com/company/press/pr?n=/pr/products/2403">press
release</a>.<br>
<p><b>12/7/2002 - Shorewall Support for Mandrake 9.0</b></p>
<p>Two months and 3 days after I ordered Mandrake 9.0, it was finally delivered.
I have installed 9.0 on one of my systems and I
am now in a position to support Shorewall users who run
Mandrake 9.0.</p>
<p><b>12/6/2002 - Debian 1.3.11a Packages Available<br>
</b></p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>12/3/2002 - Shorewall 1.3.11a</b></p>
<p>This is a bug-fix roll up which includes Roger Aich's fix for DNAT with
excluded subnets (e.g., "DNAT foo!bar ..."). Current
1.3.11 users who don't need rules of this type need
not upgrade to 1.3.11.</p>
<p><b>11/24/2002 - Shorewall 1.3.11</b></p>
<p>In this version:</p>
<ul>
<li>A 'tcpflags'
option has been added to entries in <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option causes Shorewall to make a set of sanity check on TCP
packet header flags.</li>
<li>It is now allowed
to use 'all' in the SOURCE or DEST column in a
<a href="Documentation.htm#Rules">rule</a>. When used, 'all'
must appear by itself (in may not be qualified) and it does not enable
intra-zone traffic. For example, the rule <br>
<br>
<20> <20> ACCEPT loc all
tcp 80<br>
<br>
does not enable http
traffic from 'loc' to 'loc'.</li>
<li>Shorewall's
use of the 'echo' command is now compatible with bash
clones such as ash and dash.</li>
<li>fw-&gt;fw policies
now generate a startup error. fw-&gt;fw rules generate
a warning and are ignored</li>
</ul>
<p><b>11/14/2002 - Shorewall Documentation in PDF Format</b></p>
<p>Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.10 documenation.
the PDF may be downloaded from</p>
<p><EFBFBD><EFBFBD><EFBFBD> <a href="ftp://slovakia.shorewall.net/mirror/shorewall/pdf/"
target="_self">ftp://slovakia.shorewall.net/mirror/shorewall/pdf/</a><br>
<20><><EFBFBD> <a
href="http://slovakia.shorewall.net/pub/shorewall/pdf/">http://slovakia.shorewall.net/pub/shorewall/pdf/</a><br>
</p>
<p><b>11/09/2002 - Shorewall is Back at SourceForge</b><b>
</b></p>
<p>The main Shorewall 1.3 web site is now back at SourceForge at <a
href="http://shorewall.sf.net" target="_top">http://shorewall.sf.net</a>.<br>
</p>
<p><b>11/09/2002 - Shorewall 1.3.10</b></p>
<p>In this version:</p>
<ul>
<li>You may
now <a href="IPSEC.htm#Dynamic">define the contents of
a zone dynamically</a> with the <a
href="starting_and_stopping_shorewall.htm">"shorewall add" and
"shorewall delete" commands</a>. These commands are
expected to be used primarily within <a
href="http://www.xs4all.nl/%7Efreeswan/">FreeS/Wan</a> updown
scripts.</li>
<li>Shorewall
can now do<a href="MAC_Validation.html"> MAC verification</a>
on ethernet segments. You can specify the set of allowed MAC addresses
on the segment and you can optionally tie each MAC address to
one or more IP addresses.</li>
<li>PPTP Servers
and Clients running on the firewall system may now
be defined in the<a href="PPTP.htm"> /etc/shorewall/tunnels</a>
file.</li>
<li>A new 'ipsecnat'
tunnel type is supported for use when the
<a href="IPSEC.htm">remote IPSEC endpoint is behind a NAT
gateway</a>.</li>
<li>The PATH
used by Shorewall may now be specified in <a
href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf.</a></li>
<li>The main
firewall script is now /usr/lib/shorewall/firewall.
The script in /etc/init.d/shorewall is very small and uses
/sbin/shorewall to do the real work. This change makes
custom distributions such as for Debian and for Gentoo
easier to manage since it is /etc/init.d/shorewall that tends
to have distribution-dependent code</li>
</ul>
<p><b>10/24/2002 - Shorewall is now in Gentoo Linux</b><b> </b><a
href="http://www.gentoo.org"><br>
</a></p>
Alexandru Hartmann
reports that his Shorewall package is now a part
of <a href="http://www.gentoo.org">the Gentoo Linux distribution</a>.
Thanks Alex!<br>
<p><b>10/23/2002 - Shorewall 1.3.10 Beta 1</b><b> </b></p>
In this version:<br>
<ul>
<li>You may
now <a href="IPSEC.htm#Dynamic">define the contents of a
zone dynamically</a> with the <a
href="starting_and_stopping_shorewall.htm">"shorewall add" and
"shorewall delete" commands</a>. These commands are
expected to be used primarily within <a
href="http://www.xs4all.nl/%7Efreeswan/">FreeS/Wan</a> updown
scripts.</li>
<li>Shorewall
can now do<a href="MAC_Validation.html"> MAC verification</a>
on ethernet segments. You can specify the set of allowed
MAC addresses on the segment and you can optionally tie
each MAC address to one or more IP addresses.</li>
<li>PPTP Servers
and Clients running on the firewall system may
now be defined in the<a href="PPTP.htm"> /etc/shorewall/tunnels</a>
file.</li>
<li>A new 'ipsecnat'
tunnel type is supported for use when the
<a href="IPSEC.htm">remote IPSEC endpoint is behind a NAT
gateway</a>.</li>
<li>The PATH
used by Shorewall may now be specified in <a
href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf.</a></li>
<li>The main
firewall script is now /usr/lib/shorewall/firewall.
The script in /etc/init.d/shorewall is very small and uses
/sbin/shorewall to do the real work. This change makes
custom distributions such as for Debian and for Gentoo
easier to manage since it is /etc/init.d/shorewall that
tends to have distribution-dependent code.</li>
</ul>
You may download
the Beta from:<br>
<ul>
<li><a
href="http://www.shorewall.net/pub/shorewall/Beta">http://www.shorewall.net/pub/shorewall/Beta</a></li>
<li><a
href="ftp://ftp.shorewall.net/pub/shorewall/Beta" target="_top">ftp://ftp.shorewall.net/pub/shorewall/Beta</a></li>
</ul>
<p><b>10/10/2002 - <20>Debian 1.3.9b Packages Available<br>
</b></p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>10/9/2002 - Shorewall 1.3.9b</b></p>
This release
rolls up fixes to the installer and to the firewall
script.<br>
<p><b>10/6/2002 - Shorewall.net now running on RH8.0<br>
</b><br>
The firewall
and server here at shorewall.net are now running
RedHat release 8.0.<br>
<b><br>
9/30/2002
- Shorewall 1.3.9a</b></p>
Roles up
the fix for broken tunnels.<br>
<p><b>9/30/2002 - TUNNELS Broken in 1.3.9!!!</b></p>
There is
an updated firewall script at <a
href="ftp://www.shorewall.net/pub/shorewall/errata/1.3.9/firewall"
target="_top">ftp://www.shorewall.net/pub/shorewall/errata/1.3.9/firewall</a>
-- copy that file to /usr/lib/shorewall/firewall.<br>
<p><b>9/28/2002 - Shorewall 1.3.9</b></p>
<p>In this version:<br>
</p>
<ul>
<li><a
href="configuration_file_basics.htm#dnsnames">DNS Names</a> are
now allowed in Shorewall config files (although I recommend against
using them).</li>
<li>The
connection SOURCE may now be qualified by both interface
and IP address in a <a
href="Documentation.htm#Rules">Shorewall rule</a>.</li>
<li>Shorewall
startup is now disabled after initial installation
until the file /etc/shorewall/startup_disabled is
removed. This avoids nasty surprises during reboot for
users who install Shorewall but don't configure it.</li>
<li>The
'functions' and 'version' files and the 'firewall'
symbolic link have been moved from /var/lib/shorewall
to /usr/lib/shorewall to appease the LFS police at
Debian.<br>
</li>
</ul>
<p><b>9/23/2002 - Full Shorewall Site/Mailing List Archive Search Capability
Restored</b><br>
</p>
<img src="images/j0233056.gif" alt="Brown Paper Bag" width="50"
height="86" align="left">
A
couple of recent configuration changes at www.shorewall.net
broke the Search facility:<br>
<blockquote>
<ol>
<li>Mailing List Archive Search was not available.</li>
<li>The Site Search index was incomplete</li>
<li>Only one page of matches was presented.</li>
</ol>
</blockquote>
Hopefully these problems are now corrected.
<p><b>9/23/2002 - Full Shorewall Site/Mailing List Archive Search Capability
Restored<br>
</b></p>
A couple
of recent configuration changes at www.shorewall.net
had the negative effect of breaking the Search
facility:<br>
<ol>
<li>Mailing
List Archive Search was not available.</li>
<li>The
Site Search index was incomplete</li>
<li>Only
one page of matches was presented.</li>
</ol>
Hopefully
these problems are now corrected.<br>
<p><b>9/18/2002 - <20>Debian 1.3.8 Packages Available<br>
</b></p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html.</a></p>
<p><b>9/16/2002 - Shorewall 1.3.8</b></p>
<p>In this version:<br>
</p>
<ul>
<li>A <a href="Documentation.htm#Conf">NEWNOTSYN</a> option
has been added to shorewall.conf. This option determines whether
Shorewall accepts TCP packets which are not
part of an established connection and that are
not 'SYN' packets (SYN flag on and ACK flag off).</li>
<li>The need for the 'multi' option to communicate
between zones za and zb on the same interface
is removed in the case where the chain 'za2zb' and/or
'zb2za' exists. 'za2zb' will exist if:</li>
<ul>
<li> There is a policy for za to zb; or
</li>
<li>There is at least one rule for za to zb.</li>
</ul>
</ul>
<ul>
<li>The /etc/shorewall/blacklist file now contains
three columns. In addition to the SUBNET/ADDRESS
column, there are optional PROTOCOL and PORT columns to
block only certain applications from the blacklisted addresses.<br>
</li>
</ul>
<p><b>9/11/2002 - Debian 1.3.7c Packages Available</b></p>
<p>Apt-get sources listed at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>9/2/2002 - Shorewall 1.3.7c</b></p>
<p>This is a role up of a fix for "DNAT" rules where the source zone is $FW
(fw).</p>
<p><b>8/31/2002 - I'm not available</b></p>
<p>I'm currently on vacation<6F> -- please respect my need for a couple of
weeks free of Shorewall problem reports.</p>
<p>-Tom</p>
<p><b>8/26/2002 - Shorewall 1.3.7b</b></p>
<p>This is a role up of the "shorewall refresh" bug fix and the change which
reverses the order of "dhcp" and "norfc1918"
checking.</p>
<p><b>8/26/2002 - French FTP Mirror is Operational</b></p>
<p><a target="_blank"
href="ftp://france.shorewall.net/pub/mirrors/shorewall">ftp://france.shorewall.net/pub/mirrors/shorewall</a>
is now available.</p>
<p><b>8/25/2002 - Shorewall Mirror in France</b></p>
<p>Thanks to a Shorewall user in Paris, the Shorewall web site is now mirrored
at <a target="_top"
href="http://france.shorewall.net">http://france.shorewall.net</a>.</p>
<p><b>8/25/2002 - Shorewall 1.3.7a Debian Packages Available</b></p>
<p>Lorenzo Martignoni reports that the packages for version 1.3.7a are available
at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>8/22/2002 - Shorewall 1.3.7 Wins a Brown Paper Bag Award for its Author
-- Shorewall 1.3.7a released<img
border="0" src="images/j0233056.gif" width="50" height="80"
align="middle">
</b></p>
<p>1.3.7a corrects problems occurring in rules file processing when starting
Shorewall 1.3.7.</p>
<p><b>8/22/2002 - Shorewall 1.3.7 Released 8/13/2002</b></p>
<p>Features in this release include:</p>
<ul>
<li>The 'icmp.def' file is now empty! The rules
in that file were required in ipchains firewalls
but are not required in Shorewall. Users who have
ALLOWRELATED=No in <a href="Documentation.htm#Conf">shorewall.conf</a>
should see the <a href="errata.htm#Upgrade">Upgrade
Issues</a>.</li>
<li>A 'FORWARDPING' option has been added to
<a href="Documentation.htm#Conf"> shorewall.conf</a>.
The effect of setting this variable to Yes is
the same as the effect of adding an ACCEPT rule
for ICMP echo-request in <a
href="shorewall_extension_scripts.htm">/etc/shorewall/icmpdef</a>.
Users who have such a rule in icmpdef are
encouraged to switch to FORWARDPING=Yes.</li>
<li>The loopback CLASS A Network (127.0.0.0/8)
has been added to the rfc1918 file.</li>
<li>Shorewall now works with iptables 1.2.7</li>
<li>The documentation and web site no longer uses
FrontPage themes.</li>
</ul>
<p>I would like to thank John Distler for his valuable input regarding TCP
SYN and ICMP treatment in Shorewall.
That input has led to marked improvement in
Shorewall in the last two releases.</p>
<p><b>8/13/2002 - Documentation in the <a target="_top"
href="http://www.shorewall.net/cgi-bin/cvs/cvsweb.cgi">CVS Repository</a></b></p>
<p>The Shorewall-docs project now contains just the HTML and image files -
the Frontpage files have been removed.</p>
<p><b>8/7/2002 - <i>STABLE</i></b> <b>branch added to <a target="_top"
href="http://www.shorewall.net/cgi-bin/cvs/cvsweb.cgi">CVS Repository</a></b></p>
<p>This branch will only be updated after I release a new version of Shorewall
so you can always update from this branch
to get the latest stable tree.</p>
<p><b>8/7/2002 - <a href="errata.htm#Upgrade">Upgrade Issues</a> section added
to the <a href="errata.htm">Errata Page</a></b></p>
<p>Now there is one place to go to look for issues involved with upgrading
to recent versions of Shorewall.</p>
<p><b>8/7/2002 - Shorewall 1.3.6</b></p>
<p>This is primarily a bug-fix rollup with a couple of new features:</p>
<ul>
<li>The latest <a href="shorewall_quickstart_guide.htm">QuickStart
Guides </a> including the <a
href="shorewall_setup_guide.htm">Shorewall Setup Guide.</a></li>
<li>Shorewall will now DROP TCP packets that are
not part of or related to an existing connection and
that are not SYN packets. These "New not SYN" packets
may be optionally logged by setting the LOGNEWNOTSYN
option in <a href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf</a>.</li>
<li>The processing of "New not SYN" packets may
be extended by commands in the new <a
href="shorewall_extension_scripts.htm">newnotsyn extension script</a>.</li>
</ul>
<p><b>7/30/2002 - Shorewall 1.3.5b Released</b></p>
<p>This interim release:</p>
<ul>
<li>Causes the firewall script to remove the lock
file if it is killed.</li>
<li>Once again allows lists in the second column
of the <a href="Documentation.htm#Hosts">/etc/shorewall/hosts</a>
file.</li>
<li>Includes the latest <a
href="shorewall_quickstart_guide.htm">QuickStart Guides</a>.</li>
</ul>
<p><b>7/29/2002 - New Shorewall Setup Guide Available</b></p>
<p>The first draft of this guide is available at <a
href="http://www.shorewall.net/shorewall_setup_guide.htm"> http://www.shorewall.net/shorewall_setup_guide.htm</a>.
The guide is intended for use by people
who are setting up Shorewall to manage multiple
public IP addresses and by people who want to learn
more about Shorewall than is described in the single-address
guides. Feedback on the new guide is welcome.</p>
<p><b>7/28/2002 - Shorewall 1.3.5 Debian Package Available</b></p>
<p>Lorenzo Martignoni reports that the packages are version 1.3.5a and are
available at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>7/27/2002 - Shorewall 1.3.5a Released</b></p>
<p>This interim release restores correct handling of REDIRECT rules. </p>
<p><b>7/26/2002 - Shorewall 1.3.5 Released</b></p>
<p>This will be the last Shorewall release for a while. I'm going to be
focusing on rewriting a lot of the documentation.</p>
<p><b><EFBFBD></b>In this version:</p>
<ul>
<li>Empty and invalid source and destination
qualifiers are now detected in the rules file.
It is a good idea to use the 'shorewall check' command
before you issue a 'shorewall restart' command be be
sure that you don't have any configuration problems
that will prevent a successful restart.</li>
<li>Added <b>MERGE_HOSTS</b> variable in
<a href="Documentation.htm#Conf"> shorewall.conf</a> to
provide saner behavior of the /etc/shorewall/hosts
file.</li>
<li>The time that the counters were last reset
is now displayed in the heading of the 'status'
and 'show' commands.</li>
<li>A <b>proxyarp </b>option has been added
for entries in <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>.
This option facilitates Proxy ARP sub-netting as described
in the Proxy ARP subnetting mini-HOWTO (<a
href="http://www.tldp.org/HOWTO/mini/Proxy-ARP-Subnet/">http://www.tldp.org/HOWTO/mini/Proxy-ARP-Subnet/</a>).
Specifying the proxyarp option for
an interface causes Shorewall to set /proc/sys/net/ipv4/conf/&lt;interface&gt;/proxy_arp.</li>
<li>The Samples have been updated to reflect the
new capabilities in this release. </li>
</ul>
<p><b>7/16/2002 - New Mirror in Argentina</b></p>
<p>Thanks to Arturo "Buanzo" Busleiman, there is now a Shorewall mirror in
Argentina. Thanks Buanzo!!!</p>
<p><b>7/16/2002 - Shorewall 1.3.4 Released</b></p>
<p>In this version:</p>
<ul>
<li>A new <a href="Documentation.htm#Routestopped"> /etc/shorewall/routestopped</a>
file has been added. This file is intended
to eventually replace the <b>routestopped</b>
option in the /etc/shorewall/interface and
/etc/shorewall/hosts files. This new file makes remote
firewall administration easier by allowing any IP
or subnet to be enabled while Shorewall is stopped.</li>
<li>An /etc/shorewall/stopped <a
href="Documentation.htm#Scripts">extension script</a> has been
added. This script is invoked after Shorewall
has stopped.</li>
<li>A <b>DETECT_DNAT_ADDRS </b>option has
been added to <a href="Documentation.htm#Conf">/etc/shoreall/shorewall.conf</a>.
When this option is selected, DNAT rules only
apply when the destination address is the
external interface's primary IP address.</li>
<li>The <a href="shorewall_quickstart_guide.htm">QuickStart
Guide</a> has been broken into three guides
and has been almost entirely rewritten.</li>
<li>The Samples have been updated to reflect the
new capabilities in this release. </li>
</ul>
<p><b>7/8/2002 - Shorewall 1.3.3 Debian Package Available</b></p>
<p>Lorenzo Marignoni reports that the packages are available at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>7/6/2002 - Shorewall 1.3.3 Released</b></p>
<p>In this version:</p>
<ul>
<li>Entries in /etc/shorewall/interface that use
the wildcard character ("+") now have the "multi"
option assumed.</li>
<li>The 'rfc1918' chain in the mangle table has
been renamed 'man1918' to make log messages
generated from that chain distinguishable from those
generated by the 'rfc1918' chain in the filter table.</li>
<li>Interface names appearing in the hosts file
are now validated against the interfaces file.</li>
<li>The TARGET column in the rfc1918 file is now
checked for correctness.</li>
<li>The chain structure in the nat table has
been changed to reduce the number of rules that a
packet must traverse and to correct problems with
NAT_BEFORE_RULES=No</li>
<li>The "hits" command has been enhanced.</li>
</ul>
<p><b>6/25/2002 - Samples Updated for 1.3.2</b></p>
<p>The comments in the sample configuration files have been updated to reflect
new features introduced in Shorewall
1.3.2.</p>
<p><b>6/25/2002 - Shorewall 1.3.1 Debian Package Available</b></p>
<p>Lorenzo Marignoni reports that the package is available at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>6/19/2002 - Documentation Available in PDF Format</b></p>
<p>Thanks to Mike Martinez, the Shorewall Documentation is now available for
<a href="download.htm">download</a> in <a href="http://www.adobe.com">Adobe</a>
PDF format.</p>
<p><b>6/16/2002 - Shorewall 1.3.2 Released</b></p>
<p>In this version:</p>
<ul>
<li>A <a href="Documentation.htm#Starting">logwatch command</a>
has been added to /sbin/shorewall.</li>
<li>A <a href="blacklisting_support.htm">dynamic blacklist
facility</a> has been added.</li>
<li>Support for the <a href="Documentation.htm#Conf">Netfilter
multiport match function</a> has been
added.</li>
<li>The files <b>firewall, functions </b>and
<b>version</b> have been moved from /etc/shorewall
to /var/lib/shorewall.</li>
</ul>
<p><b>6/6/2002 - Why CVS Web access is Password Protected</b></p>
<p>Last weekend, I installed the CVS Web package to provide brower-based access
to the Shorewall CVS repository. Since then, I have had several instances
where my server was almost unusable due to the high load generated by website
copying tools like HTTrack and WebStripper. These mindless tools:</p>
<ul>
<li>Ignore robot.txt files.</li>
<li>Recursively copy everything that they find.</li>
<li>Should be classified as weapons rather than
tools.</li>
</ul>
<p>These tools/weapons are particularly damaging when combined with CVS Web
because they doggedly follow every link
in the cgi-generated HTML resulting in 1000s
of executions of the cvsweb.cgi script. Yesterday,
I spend several hours implementing measures to block
these tools but unfortunately, these measures resulted
in my server OOM-ing under even moderate load.</p>
<p>Until I have the time to understand the cause of the OOM (or until I buy
more RAM if that is what is required),
CVS Web access will remain Password Protected.
</p>
<p><b>6/5/2002 - Shorewall 1.3.1 Debian Package Available</b></p>
<p>Lorenzo Marignoni reports that the package is available at <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</p>
<p><b>6/2/2002 - Samples Corrected</b></p>
<p>The 1.3.0 samples configurations had several serious problems that prevented
DNS and SSH from working properly. These
problems have been corrected in the <a
href="/pub/shorewall/samples-1.3.1">1.3.1 samples.</a></p>
<p><b>6/1/2002 - Shorewall 1.3.1 Released</b></p>
<p>Hot on the heels of 1.3.0, this release:</p>
<ul>
<li>Corrects a serious problem with "all <i>&lt;zone&gt;</i>
CONTINUE" policies. This problem is present in
all versions of Shorewall that support the CONTINUE
policy. These previous versions optimized away the "all2<i>&lt;zone&gt;</i>"
chain and replaced it with the "all2all" chain with
the usual result that a policy of REJECT was enforced rather
than the intended CONTINUE policy.</li>
<li>Adds an <a href="Documentation.htm#rfc1918">/etc/shorewall/rfc1918</a>
file for defining the exact behavior of the<a
href="Documentation.htm#Interfaces"> 'norfc1918' interface option</a>.</li>
</ul>
<p><b>5/29/2002 - Shorewall 1.3.0 Released</b></p>
<p>In addition to the changes in Beta 1, Beta 2 and RC1, Shorewall 1.3.0
includes:</p>
<ul>
<li>A 'filterping' interface option that allows
ICMP echo-request (ping) requests addressed
to the firewall to be handled by entries in /etc/shorewall/rules
and /etc/shorewall/policy.</li>
</ul>
<p><b>5/23/2002 - Shorewall 1.3 RC1 Available</b></p>
<p>In addition to the changes in Beta 1 and Beta 2, RC1 (Version 1.2.92)
incorporates the following:</p>
<ul>
<li>Support for the /etc/shorewall/whitelist
file has been withdrawn. If you need whitelisting,
see <a href="/1.3/whitelisting_under_shorewall.htm">these
instructions</a>.</li>
</ul>
<p><b>5/19/2002 - Shorewall 1.3 Beta 2 Available</b></p>
<p>In addition to the changes in Beta 1, this release which carries the
designation 1.2.91 adds:</p>
<ul>
<li>The structure of the firewall is changed markedly.
There is now an INPUT and a FORWARD chain for
each interface; this reduces the number of rules
that a packet must traverse, especially in complicated
setups.</li>
<li><a href="Documentation.htm#Exclude">Sub-zones may now
be excluded from DNAT and REDIRECT rules.</a></li>
<li>The names of the columns in a number of the
configuration files have been changed to be more
consistent and self-explanatory and the documentation
has been updated accordingly.</li>
<li>The sample configurations have been updated
for 1.3.</li>
</ul>
<p><b>5/17/2002 - Shorewall 1.3 Beta 1 Available</b></p>
<p>Beta 1 carries the version designation 1.2.90 and implements the following
features:</p>
<ul>
<li>Simplified rule syntax which makes the intent
of each rule clearer and hopefully makes Shorewall
easier to learn.</li>
<li>Upward compatibility with 1.2 configuration
files has been maintained so that current users
can migrate to the new syntax at their convenience.</li>
<li><b><font color="#cc6666">WARNING:<3A> Compatibility with
the old parameterized sample configurations has NOT been
maintained. Users still running those configurations
should migrate to the new sample configurations
before upgrading to 1.3 Beta 1.</font></b></li>
</ul>
<p><b>5/4/2002 - Shorewall 1.2.13 is Available</b></p>
<p>In this version:</p>
<ul>
<li><a href="Documentation.htm#Whitelist">White-listing</a>
is supported.</li>
<li><a href="Documentation.htm#Policy">SYN-flood protection
</a>is added.</li>
<li>IP addresses added under <a
href="Documentation.htm#Conf">ADD_IP_ALIASES and ADD_SNAT_ALIASES</a>
now inherit the VLSM and Broadcast Address
of the interface's primary IP address.</li>
<li>The order in which port forwarding DNAT and
Static DNAT <a href="Documentation.htm#Conf">can
now be reversed</a> so that port forwarding rules can
override the contents of <a href="Documentation.htm#NAT"> /etc/shorewall/nat</a>.
</li>
</ul>
<p><b>4/30/2002 - Shorewall Debian News</b></p>
<p>Lorenzo Marignoni reports that Shorewall 1.2.12 is now in both the <a
href="http://packages.debian.org/testing/net/shorewall.html">Debian
Testing Branch</a> and the <a
href="http://packages.debian.org/unstable/net/shorewall.html">Debian
Unstable Branch</a>.</p>
<p><b>4/20/2002 - Shorewall 1.2.12 is Available</b></p>
<ul>
<li>The 'try' command works again</li>
<li>There is now a single RPM that also works
with SuSE.</li>
</ul>
<p><b>4/17/2002 - Shorewall Debian News</b></p>
<p>Lorenzo Marignoni reports that:</p>
<ul>
<li>Shorewall 1.2.10 is in the <a
href="http://packages.debian.org/testing/net/shorewall.html">Debian
Testing Branch</a></li>
<li>Shorewall 1.2.11 is in the <a
href="http://packages.debian.org/unstable/net/shorewall.html">Debian
Unstable Branch</a></li>
</ul>
<p>Thanks, Lorenzo!</p>
<p><b>4/16/2002 - Shorewall 1.2.11 RPM Available for SuSE</b></p>
<p>Thanks to <a href="mailto:s.mohr@familie-mohr.com">Stefan Mohr</a>, there
is now a Shorewall 1.2.11 <a
href="http://www.shorewall.net/pub/shorewall/shorewall-1.2-11.i686.suse73.rpm">
SuSE RPM</a> available. </p>
<p><b>4/13/2002 - Shorewall 1.2.11 Available </b></p>
<p>In this version:</p>
<ul>
<li>The 'try' command now accepts an optional
timeout. If the timeout is given in the command,
the standard configuration will automatically be
restarted after the new configuration has been running
for that length of time. This prevents a remote admin
from being locked out of the firewall in the case where
the new configuration starts but prevents access.</li>
<li>Kernel route filtering may now be enabled
globally using the new ROUTE_FILTER parameter
in <a href="Documentation.htm#Conf"> /etc/shorewall/shorewall.conf</a>.</li>
<li>Individual IP source addresses and/or subnets
may now be excluded from masquerading/SNAT.</li>
<li>Simple "Yes/No" and "On/Off" values are now
case-insensitive in /etc/shorewall/shorewall.conf.</li>
</ul>
<p><b>4/13/2002 - Hamburg Mirror now has FTP </b></p>
<p>Stefan now has an FTP mirror at <a target="_blank"
href="ftp://germany.shorewall.net/pub/shorewall"> ftp://germany.shorewall.net/pub/shorewall</a>.<2E>
Thanks Stefan!</p>
<p><b>4/12/2002 - New Mirror in Hamburg</b></p>
<p>Thanks to <a href="mailto:s.mohr@familie-mohr.com">Stefan Mohr</a>, there
is now a mirror of the Shorewall website
at <a target="_top" href="http://germany.shorewall.net"> http://germany.shorewall.net</a>.
</p>
<p><b>4/10/2002 - Shorewall QuickStart Guide Version 1.1 Available</b></p>
<p><a href="shorewall_quickstart_guide.htm">Version 1.1 of the QuickStart
Guide</a> is now available. Thanks to
those who have read version 1.0 and offered their
suggestions. Corrections have also been made to
the sample scripts.</p>
<p><b>4/9/2002 - Shorewall QuickStart Guide Version 1.0 Available</b></p>
<p><a href="shorewall_quickstart_guide.htm">Version 1.0 of the QuickStart
Guide</a> is now available. This Guide
and its accompanying sample configurations
are expected to provide a replacement for the recently
withdrawn parameterized samples. </p>
<p><b>4/8/2002 - Parameterized Samples Withdrawn </b></p>
<p>Although the <a
href="http://www.shorewall.net/pub/shorewall/samples-1.2.1/">parameterized
samples</a> have allowed people to get
a firewall up and running quickly, they have
unfortunately set the wrong level of expectation among
those who have used them. I am therefore withdrawing
support for the samples and I am recommending that
they not be used in new Shorewall installations.</p>
<p><b>4/2/2002 - Updated Log Parser</b></p>
<p><a href="mailto:JML@redwoodtech.com">John Lodge</a> has provided an updated
version of his <a
href="pub/shorewall/parsefw/">CGI-based log parser</a>
with corrected date handling. </p>
<p><b>3/30/2002 - Shorewall Website Search Improvements</b></p>
<p>The quick search on the home page now excludes the mailing list archives.
The <a href="htdig/search.html">Extended
Search</a> allows excluding the archives
or restricting the search to just the archives. An archive
search form is also available on the <a
href="http://lists.shorewall.net/mailing_list.htm">mailing list information
page</a>.</p>
<p><b>3/28/2002 - Debian Shorewall News (From Lorenzo Martignoni)</b></p>
<ul>
<li>The 1.2.10 Debian Package is available at
<a href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</li>
<li>Shorewall 1.2.9 is now in the <a
href="http://packages.debian.org/unstable/net/shorewall.html">Debian
Unstable Distribution</a>.</li>
</ul>
<p><b>3/25/2002 - Log Parser Available</b></p>
<p><a href="mailto:JML@redwoodtech.com">John Lodge</a> has provided a <a
href="pub/shorewall/parsefw/">CGI-based log parser</a> for Shorewall. Thanks
John.</p>
<p><b>3/20/2002 - Shorewall 1.2.10 Released</b></p>
<p>In this version:</p>
<ul>
<li>A "shorewall try" command has been added (syntax:
shorewall try <i> &lt;configuration
directory&gt;</i>). This command attempts "shorewall
-c <i> &lt;configuration directory&gt;</i> start"
and if that results in the firewall being stopped due
to an error, a "shorewall start" command is executed. The
'try' command allows you to create a new <a
href="Documentation.htm#Configs"> configuration</a> and attempt
to start it; if there is an error that leaves your firewall
in the stopped state, it will automatically be restarted
using the default configuration (in /etc/shorewall).</li>
<li>A new variable ADD_SNAT_ALIASES has been added
to <a href="Documentation.htm#Conf">/etc/shorewall/shorewall.conf</a>.
If this variable is set to "Yes", Shorewall
will automatically add IP addresses listed
in the third column of the <a href="Documentation.htm#Masq">
/etc/shorewall/masq</a> file.</li>
<li>Copyright notices have been added to the documenation.</li>
</ul>
<p><b>3/11/2002 - Shorewall 1.2.9 Released</b></p>
<p>In this version:</p>
<ul>
<li>Filtering by <a href="Documentation.htm#MAC">MAC
address</a> has been added. MAC addresses may be used
as the source address in:
<ul>
<li>Filtering rules (<a
href="Documentation.htm#Rules">/etc/shorewall/rules</a>)</li>
<li>Traffic Control Classification Rules
(<a href="traffic_shaping.htm#tcrules">/etc/shorewall/tcrules</a>)</li>
<li>TOS Rules (<a href="Documentation.htm#TOS">/etc/shorewall/tos</a>)</li>
<li>Blacklist (<a href="Documentation.htm#Blacklist">/etc/shorewall/blacklist</a>)</li>
</ul>
</li>
<li>Several bugs have been fixed</li>
<li>The 1.2.9 Debian Package is also available
at <a href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a>.</li>
</ul>
<p><b>3/1/2002 - 1.2.8 Debian Package is Available</b></p>
<p>See <a href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a></p>
<p><b>2/25/2002 - New Two-interface Sample</b></p>
<p>I've enhanced the two interface sample to allow access from the firewall
to servers in the local zone - <a
href="http://www.shorewall.net/pub/shorewall/LATEST.samples/two-interfaces.tgz">
http://www.shorewall.net/pub/shorewall/LATEST.samples/two-interfaces.tgz</a></p>
<p><b>2/23/2002 - Shorewall 1.2.8 Released</b></p>
<p>Do to a serious problem with 1.2.7, I am releasing 1.2.8. It corrects
problems associated with the lock file used to prevent multiple state-changing
operations from occuring simultaneously.
My apologies for any inconvenience my carelessness
may have caused.</p>
<p><b>2/22/2002 - Shorewall 1.2.7 Released</b></p>
<p>In this version:</p>
<ul>
<li>UPnP probes (UDP destination port 1900) are
now silently dropped in the <i>common</i> chain</li>
<li>RFC 1918 checking in the mangle table has
been streamlined to no longer require packet
marking. RFC 1918 checking in the filter table has
been changed to require half as many rules as previously.</li>
<li>A 'shorewall check' command has been added
that does a cursory validation of the zones, interfaces,
hosts, rules and policy files.</li>
</ul>
<p><b>2/18/2002 - 1.2.6 Debian Package is Available</b></p>
<p>See <a href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a></p>
<p><b>2/8/2002 - Shorewall 1.2.6 Released</b></p>
<p>In this version:</p>
<ul>
<li>$-variables may now be used anywhere in the
configuration files except /etc/shorewall/zones.</li>
<li>The interfaces and hosts files now have their
contents validated before any changes are made
to the existing Netfilter configuration. The appearance
of a zone name that isn't defined in /etc/shorewall/zones
causes "shorewall start" and "shorewall restart"
to abort without changing the Shorewall state.
Unknown options in either file cause a warning to be issued.</li>
<li>A problem occurring when BLACKLIST_LOGLEVEL
was not set has been corrected.</li>
</ul>
<p><b>2/4/2002 - Shorewall 1.2.5 Debian Package Available</b></p>
<p>see <a href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a></p>
<p><b>2/1/2002 - Shorewall 1.2.5 Released</b></p>
<p>Due to installation problems with Shorewall 1.2.4, I have released Shorewall
1.2.5. Sorry for the rapid-fire development.</p>
<p>In version 1.2.5:</p>
<ul>
<li>The installation problems have been corrected.</li>
<li><a href="Documentation.htm#Masq">SNAT</a> is now supported.</li>
<li>A "shorewall version" command has been added</li>
<li>The default value of the STATEDIR variable
in /etc/shorewall/shorewall.conf has been changed
to /var/lib/shorewall in order to conform to the
GNU/Linux File Hierarchy Standard, Version 2.2.</li>
</ul>
<p><b>1/28/2002 - Shorewall 1.2.4 Released</b></p>
<ul>
<li>The "fw" zone <a href="Documentation.htm#FW">may now
be given a different name</a>.</li>
<li>You may now place end-of-line comments (preceded
by '#') in any of the configuration files</li>
<li>There is now protection against against two
state changing operations occuring concurrently.
This is implemented using the 'lockfile' utility
if it is available (lockfile is part of procmail);
otherwise, a less robust technique is used. The lockfile
is created in the STATEDIR defined in /etc/shorewall/shorewall.conf
and has the name "lock".</li>
<li>"shorewall start" no longer fails if "detect"
is specified in <a
href="Documentation.htm#Interfaces">/etc/shorewall/interfaces</a>
for an interface with subnet mask 255.255.255.255.</li>
</ul>
<p><b>1/27/2002 - Shorewall 1.2.3 Debian Package Available </b>-- see <a
href="http://security.dsi.unimi.it/%7Elorenzo/debian.html">http://security.dsi.unimi.it/~lorenzo/debian.html</a></p>
<p><b>1/20/2002 - Corrected firewall script available<6C></b></p>
<p>Corrects a problem with BLACKLIST_LOGLEVEL. See <a href="errata.htm">the
errata</a> for details.</p>
<p><b>1/19/2002 - Shorewall 1.2.3 Released</b></p>
<p>This is a minor feature and bugfix release. The single new feature is:</p>
<ul>
<li>Support for TCP MSS Clamp to PMTU -- This support
is usually required when the internet connection
is via PPPoE or PPTP and may be enabled using the
<a href="Documentation.htm#ClampMSS">CLAMPMSS</a> option in
/etc/shorewall/shorewall.conf.</li>
</ul>
<p>The following problems were corrected:</p>
<ul>
<li>The "shorewall status" command no longer hangs.</li>
<li>The "shorewall monitor" command now displays
the icmpdef chain</li>
<li>The CLIENT PORT(S) column in tcrules is no
longer ignored</li>
</ul>
<p><b>1/18/2002 - Shorewall 1.2.2 packaged with new </b><a
href="http://leaf.sourceforge.net">LEAF</a><b> release</b></p>
<p>Jacques Nilo and Eric Wolzak have released a kernel 2.4.16 LEAF distribution
that includes Shorewall 1.2.2. See <a
href="http://leaf.sourceforge.net/devel/jnilo">http://leaf.sourceforge.net/devel/jnilo</a>
for details.</p>
<p><b>1/11/2002 - Debian Package (.deb) Now Available - </b>Thanks to <a
href="mailto:lorenzo.martignoni@milug.org">Lorenzo Martignoni</a>, a 1.2.2
Shorewall Debian package is now available.
There is a link to Lorenzo's site from the <a
href="download.htm">Shorewall download page</a>.</p>
<p><b>1/9/2002 - Updated 1.2.2 /sbin/shorewall available - </b><a
href="/pub/shorewall/errata/1.2.2/shorewall">This corrected version </a>restores
the "shorewall status" command to health.</p>
<p><b>1/8/2002 - Shorewall 1.2.2 Released</b></p>
<p>In version 1.2.2</p>
<ul>
<li>Support for IP blacklisting has been added
<ul>
<li>You specify whether you want packets from
blacklisted hosts dropped or rejected using
the <a href="Documentation.htm#BLDisposition">BLACKLIST_DISPOSITION
</a>setting in /etc/shorewall/shorewall.conf</li>
<li>You specify whether you want packets from
blacklisted hosts logged and at what syslog
level using the <a href="Documentation.htm#BLLoglevel">BLACKLIST_LOGLEVEL</a>
setting in /etc/shorewall/shorewall.conf</li>
<li>You list the IP addresses/subnets that
you wish to blacklist in <a
href="Documentation.htm#Blacklist">/etc/shorewall/blacklist</a></li>
<li>You specify the interfaces you want checked
against the blacklist using the new "<a
href="Documentation.htm#BLInterface">blacklist</a>" option
in /etc/shorewall/interfaces.</li>
<li>The black list is refreshed from /etc/shorewall/blacklist
by the "shorewall refresh" command.</li>
</ul>
</li>
<li>Use of TCP RST replies has been expanded<65>
<ul>
<li>TCP connection requests rejected because
of a REJECT policy are now replied with a TCP
RST packet.</li>
<li>TCP connection requests rejected because
of a protocol=all rule in /etc/shorewall/rules
are now replied with a TCP RST packet.</li>
</ul>
</li>
<li>A <a href="Documentation.htm#Logfile">LOGFILE</a> specification
has been added to /etc/shorewall/shorewall.conf. LOGFILE
is used to tell the /sbin/shorewall program where to look
for Shorewall messages.</li>
</ul>
<p><b>1/5/2002 - New Parameterized Samples (<a
href="ftp://ftp.shorewall.net/pub/shorewall/samples-1.2.0/"
target="_blank">version 1.2.0</a>) released. </b>These are minor updates
to the previously-released samples. There
are two new rules added:</p>
<ul>
<li>Unless you have explicitly enabled Auth connections
(tcp port 113) to your firewall, these connections
will be REJECTED rather than DROPPED. This speeds
up connection establishment to some servers.</li>
<li>Orphan DNS replies are now silently dropped.</li>
</ul>
<p>See the README file for upgrade instructions.</p>
<p><b>1/1/2002 - <u><font color="#ff6633">Shorewall Mailing List Moving</font></u></b></p>
<p>The Shorewall mailing list hosted at <a href="http://sourceforge.net">
Sourceforge</a> is moving to Shorewall.net.
If you are a current subscriber to the list
at Sourceforge, please <a
href="shorewall_mailing_list_migration.htm">see these instructions</a>.
If you would like to subscribe to the new
list, visit <a
href="http://www.shorewall.net/mailman/listinfo/shorewall-users">http://www.shorewall.net/mailman/listinfo/shorewall-users</a>.</p>
<p><b>12/31/2001 - Shorewall 1.2.1 Released</b></p>
<p>In version 1.2.1:</p>
<ul>
<li><a href="Documentation.htm#LogUncleanOption">Logging of Mangled/Invalid
Packets</a> is added.<2E></li>
<li>The <a href="IPIP.htm">tunnel script</a> has
been corrected.</li>
<li>'shorewall show tc' now correctly handles
tunnels.</li>
</ul>
<p><b>12/21/2001 - Shorewall 1.2.0 Released!</b> - <b>I couldn't resist releasing
1.2 on 12/21/2001</b></p>
<p>Version 1.2 contains the following new features:</p>
<ul>
<li>Support for <a href="traffic_shaping.htm">Traffic
Control/Shaping</a></li>
<li>Support for <a href="Documentation.htm#Unclean">Filtering
of Mangled/Invalid Packets</a></li>
<li>Support for <a href="IPIP.htm">GRE Tunnels</a></li>
</ul>
<p>For the next month or so, I will continue to provide corrections to version
1.1.18 as necessary so that current
version 1.1.x users will not be forced into
a quick upgrade to 1.2.0 just to have access to bug fixes.</p>
<p>For those of you who have installed one of the Beta RPMS, you will need
to use the "--oldpackage" option when
upgrading to 1.2.0:</p>
<blockquote>
<p>rpm -Uvh --oldpackage shorewall-1.2-0.noarch.rpm</p>
</blockquote>
<p><b>12/19/2001 - Thanks to <a href="mailto:scowles@infohiiway.com">Steve
Cowles</a>, there is now a Shorewall
mirror in Texas. </b>This web site is mirrored
at <a href="http://www.infohiiway.com/shorewall" target="_top">http://www.infohiiway.com/shorewall</a>
and the ftp site is at <a
href="ftp://ftp.infohiiway.com/pub/mirrors/shorewall">ftp://ftp.infohiiway.com/pub/mirrors/shorewall</a>.<b><EFBFBD></b></p>
<p><b>11/30/2001 - A new set of the parameterized <a
href="ftp://ftp.shorewall.net/pub/shorewall/samples-1.1.18">Sample
Configurations</a> has been released</b>. In this version:</p>
<ul>
<li>Ping is now allowed between the zones.</li>
<li>In the three-interface configuration, it is
now possible to configure the internet services that
are to be available to servers in the DMZ.<2E></li>
</ul>
<p><b>11/20/2001 - The current version of Shorewall is 1.1.18.<2E></b></p>
<p>In this version:</p>
<ul>
<li>The spelling of ADD_IP_ALIASES has been corrected
in the shorewall.conf file</li>
<li>The logic for deleting user-defined chains
has been simplified so that it avoids a bug in the
LRP version of the 'cut' utility.</li>
<li>The /var/lib/lrpkg/shorwall.conf file has
been corrected to properly display the NAT entry
in that file.</li>
</ul>
<p><b>11/19/2001 - Thanks to <a href="mailto:shorewall@timelord.sk">Juraj
Ontkanin</a>, there is now a Shorewall
mirror in the Slovak Republic</b>. The website
is now mirrored at <a
href="http://www.nrg.sk/mirror/shorewall" target="_top">http://www.nrg.sk/mirror/shorewall</a>
and the FTP site is mirrored at <a
href="ftp://ftp.nrg.sk/mirror/shorewall">ftp://ftp.nrg.sk/mirror/shorewall</a>.</p>
<p><b>11/2/2001 - Announcing Shorewall Parameter-driven Sample Configurations.</b>
There are three sample configurations:</p>
<ul>
<li>One Interface -- for a standalone system.</li>
<li>Two Interfaces -- A masquerading firewall.</li>
<li>Three Interfaces -- A masquerading firewall
with DMZ.</li>
</ul>
<p>Samples may be downloaded from <a
href="ftp://ftp.shorewall.net/pub/shorewall/samples-1.1.17"> ftp://ftp.shorewall.net/pub/shorewall/samples-1.1.17</a>
. See the README file for instructions.</p>
<p><b>11/1/2001 - The current version of Shorewall is 1.1.17</b>.<2E> I intend
this to be the last of the 1.1
Shorewall releases.</p>
<p> In this version:</p>
<ul>
<li>The handling of <a
href="Documentation.htm#Aliases">ADD_IP_ALIASES</a>
has been corrected.<2E></li>
</ul>
<p><b>10/22/2001 - The current version of Shorewall is 1.1.16</b>. In this
version:</p>
<ul>
<li>A new "shorewall show connections" command
has been added.</li>
<li>In the "shorewall monitor" output, the currently
tracked connections are now shown on a separate
page.</li>
<li>Prior to this release, Shorewall unconditionally
added the external IP adddress(es) specified
in /etc/shorewall/nat. Beginning with version
1.1.16, a new parameter (<a href="Documentation.htm#Aliases">ADD_IP_ALIASES</a>)
may be set to "no" (or "No") to inhibit
this behavior. This allows IP aliases created using
your distribution's network configuration tools
to be used in static NAT.<2E></li>
</ul>
<p><b>10/15/2001 - The current version of Shorewall is 1.1.15.</b> In this
version:</p>
<ul>
<li>Support for nested zones has been improved.
See <a href="Documentation.htm#Nested"> the documentation</a>
for details</li>
<li>Shorewall now correctly checks the alternate
configuration directory for the 'zones' file.</li>
</ul>
<p><b>10/4/2001 - The current version of Shorewall is 1.1.14.</b> In this
version</p>
<ul>
<li>Shorewall now supports alternate configuration
directories. When an alternate directory is
specified when starting or restarting Shorewall
(e.g., "shorewall -c /etc/testconf restart"), Shorewall
will first look for configuration files in the alternate
directory then in /etc/shorewall. To create an alternate
configuration simply:<br>
1. Create a New Directory<br>
2. Copy to that directory any of your configuration
files that you want to change.<br>
3. Modify the copied files as needed.<br>
4. Restart Shorewall specifying the new directory.</li>
<li>The rules for allowing/disallowing icmp echo-requests
(pings) are now moved after rules created when
processing the rules file. This allows you to add
rules that selectively allow/deny ping based on source or
destination address.</li>
<li>Rules that specify multiple client ip addresses
or subnets no longer cause startup failures.</li>
<li>Zone names in the policy file are now validated
against the zones file.</li>
<li>If you have <a
href="Documentation.htm#MangleEnabled">packet mangling</a>
support enabled, the "<a
href="Documentation.htm#Interfaces">norfc1918</a>" interface
option now logs and drops any incoming packets on the interface
that have an RFC 1918 destination address.</li>
</ul>
<p><b>9/12/2001 - The current version of Shorewall is 1.1.13</b>. In this
version</p>
<ul>
<li>Shell variables can now be used to parameterize
Shorewall rules.</li>
<li>The second column in the hosts file may now
contain a comma-separated list.<br>
<br>
Example:<br>
<20><><EFBFBD> sea<65><61><EFBFBD> eth0:130.252.100.0/24,206.191.149.0/24</li>
<li>Handling of multi-zone interfaces has been
improved. See the <a
href="Documentation.htm#Interfaces">documentation for the /etc/shorewall/interfaces
file</a>.</li>
</ul>
<p><b>8/28/2001 - The current version of Shorewall is 1.1.12</b>. In this
version</p>
<ul>
<li>Several columns in the rules file may now
contain comma-separated lists.</li>
<li>Shorewall is now more rigorous in parsing the
options in /etc/shorewall/interfaces.</li>
<li>Complementation using "!" is now supported
in rules.</li>
</ul>
<p><b>7/28/2001 - The current version of Shorewall is 1.1.11</b>. In this
version</p>
<ul>
<li>A "shorewall refresh" command has been added
to allow for refreshing the rules associated with
the broadcast address on a dynamic interface. This
command should be used in place of "shorewall restart"
when the internet interface's IP address changes.</li>
<li>The /etc/shorewall/start file (if any) is now
processed after all temporary rules have been
deleted. This change prevents the accidental
removal of rules added during the processing of that file.</li>
<li>The "dhcp" interface option is now applicable
to firewall interfaces used by a DHCP server
running on the firewall.</li>
<li>The RPM can now be built from the .tgz file
using "rpm -tb"<22></li>
</ul>
<p><b>7/6/2001 - The current version of Shorewall is 1.1.10.</b> In this version</p>
<ul>
<li>Shorewall now enables Ipv4 Packet Forwarding
by default. Packet forwarding may be disabled
by specifying IP_FORWARD=Off in /etc/shorewall/shorewall.conf.
If you don't want Shorewall to enable or disable
packet forwarding, add IP_FORWARDING=Keep to your
/etc/shorewall/shorewall.conf file.</li>
<li>The "shorewall hits" command no longer lists
extraneous service names in its last report.</li>
<li>Erroneous instructions in the comments at the
head of the firewall script have been corrected.</li>
</ul>
<p><b>6/23/2001 - The current version of Shorewall is 1.1.9.</b> In this version</p>
<ul>
<li>The "tunnels" file <u>really</u> is in the
RPM now.</li>
<li>SNAT can now be applied to port-forwarded connections.</li>
<li>A bug which would cause firewall start failures
in some dhcp configurations has been fixed.</li>
<li>The firewall script now issues a message if
you have the name of an interface in the second column
in an entry in /etc/shorewall/masq and that interface
is not up.</li>
<li>You can now configure Shorewall so that it<a
href="Documentation.htm#NatEnabled"> doesn't require the NAT and/or
mangle netfilter modules</a>.</li>
<li>Thanks to Alex<65> Polishchuk, the "hits" command
from seawall is now in shorewall.</li>
<li>Support for <a href="IPIP.htm">IPIP tunnels</a>
has been added.</li>
</ul>
<p><b>6/18/2001 - The current version of Shorewall is 1.1.8</b>. In this version</p>
<ul>
<li>A typo in the sample rules file has been corrected.</li>
<li>It is now possible to restrict masquerading
by<a href="Documentation.htm#Masq"> destination host or subnet.</a></li>
<li>It is now possible to have static <a
href="NAT.htm#LocalPackets">NAT rules applied to packets originating
on the firewall itself</a>.</li>
</ul>
<p><b>6/2/2001 - The current version of Shorewall is 1.1.7.</b> In this version</p>
<ul>
<li>The TOS rules are now deleted when the firewall
is stopped.</li>
<li>The .rpm will now install regardless of which
version of iptables is installed.</li>
<li>The .rpm will now install without iproute2
being installed.</li>
<li>The documentation has been cleaned up.</li>
<li>The sample configuration files included in
Shorewall have been formatted to 80 columns for
ease of editing on a VGA console.</li>
</ul>
<p><b>5/25/2001 - The current version of Shorewall is 1.1.6</b>. In this version</p>
<ul>
<li><a href="Documentation.htm#lograte">You may now rate-limit
the packet log.</a></li>
<li> Previous versions of Shorewall have an
implementation of Static NAT which violates the
principle of least surprise.<2E> NAT only occurs for packets
arriving at (DNAT) or send from (SNAT) the interface
named in the INTERFACE column of /etc/shorewall/nat. Beginning
with version 1.1.6, NAT effective regardless of
which interface packets come from or are destined to. To get
compatibility with prior versions, I have added a new
"ALL <a href="NAT.htm#AllInterFaces">"ALL INTERFACES"<22> column
to /etc/shorewall/nat</a>. By placing "no" or "No" in
the new column, the NAT behavior of prior versions may
be retained.<2E></li>
<li>The treatment of <a href="IPSEC.htm#RoadWarrior">IPSEC
Tunnels where the remote gateway is a standalone system
has been improved</a>. Previously, it was necessary to include
an additional rule allowing UDP port 500 traffic to pass
through the tunnel. Shorewall will now create this rule automatically
when you place the name of the remote peer's zone in a new GATEWAY
ZONE column in /etc/shorewall/tunnels.<2E></li>
</ul>
<p><b>5/20/2001 - The current version of Shorewall is 1.1.5.</b> In this version</p>
<ul>
<li><a href="Documentation.htm#modules">You may now pass parameters
when loading netfilter modules and you can specify the modules
to load.</a></li>
<li>Compressed modules are now loaded. This requires
that you modutils support loading compressed
modules.</li>
<li><a href="Documentation.htm#TOS">You may now set the Type
of Service (TOS) field in packets.</a></li>
<li>Corrected rules generated for port redirection
(again).</li>
</ul>
<p><b>5/10/2001 - The current version of Shorewall is 1.1.4.</b> In this version</p>
<ul>
<li> <a href="Documentation.htm#Conf">Accepting RELATED
connections is now optional.</a></li>
<li>Corrected problem where if "shorewall start"
aborted early (due to kernel configuration errors
for example), superfluous 'sed' error messages
were reported.</li>
<li>Corrected rules generated for port redirection.</li>
<li>The order in which iptables kernel modules
are loaded has been corrected (Thanks to Mark
Pavlidis).<2E></li>
</ul>
<p><b>4/28/2001 - The current version of Shorewall is 1.1.3.</b> In this version</p>
<ul>
<li>Correct message issued when Proxy ARP address
added (Thanks to Jason Kirtland).</li>
<li>/tmp/shorewallpolicy-$$ is now removed if
there is an error while starting the firewall.</li>
<li>/etc/shorewall/icmp.def and /etc/shorewall/common.def
are now used to define the icmpdef and common
chains unless overridden by the presence of /etc/shorewall/icmpdef
or /etc/shorewall/common.</li>
<li>In the .lrp, the file /var/lib/lrpkg/shorwall.conf
has been corrected. An extra space after "/etc/shorwall/policy"
has been removed and "/etc/shorwall/rules" has
been added.</li>
<li>When a sub-shell encounters a fatal error
and has stopped the firewall, it now kills the
main shell so that the main shell will not continue.</li>
<li>A problem has been corrected where a sub-shell
stopped the firewall and main shell continued
resulting in a perplexing error message referring
to "common.so" resulted.</li>
<li>Previously, placing "-" in the PORT(S) column
in /etc/shorewall/rules resulted in an error message
during start. This has been corrected.</li>
<li>The first line of "install.sh" has been corrected
-- I had inadvertently deleted the initial "#".</li>
</ul>
<p><b>4/12/2001 - The current version of Shorewall is 1.1.2.</b> In this version</p>
<ul>
<li>Port redirection now works again.</li>
<li>The icmpdef and common chains <a
href="Documentation.htm#Icmpdef">may now be user-defined</a>.</li>
<li>The firewall no longer fails to start if "routefilter"
is specified for an interface that isn't started.
A warning message is now issued in this case.</li>
<li>The LRP Version is renamed "shorwall" for
8,3 MSDOS file system compatibility.</li>
<li>A couple of LRP-specific problems were corrected.</li>
</ul>
<p><b>4/8/2001 - Shorewall is now affiliated with the <a
href="http://leaf.sourceforge.net">Leaf Project</a> </b> <a
href="http://leaf.sourceforge.net"> <img border="0"
src="images/leaflogo.gif" width="49" height="36">
</a></p>
<p><b>4/5/2001 - The current version of Shorewall is 1.1.1. In this version:</b></p>
<ul>
<li>The common chain is traversed from INPUT, OUTPUT
and FORWARD before logging occurs</li>
<li>The source has been cleaned up dramatically</li>
<li>DHCP DISCOVER packets with RFC1918 source addresses
no longer generate log messages. Linux DHCP clients
generate such packets and it's annoying to
see them logged.<2E></li>
</ul>
<p><b>3/25/2001 - The current version of Shorewall is 1.1.0. In this version:</b></p>
<ul>
<li>Log messages now indicate the packet disposition.</li>
<li>Error messages have been improved.</li>
<li>The ability to define zones consisting of an
enumerated set of hosts and/or subnetworks has been
added.</li>
<li>The zone-to-zone chain matrix is now sparse
so that only those chains that contain meaningful
rules are defined.</li>
<li>240.0.0.0/4 and 169.254.0.0/16 have been added
to the source subnetworks whose packets are dropped
under the <i>norfc1918</i> interface option.</li>
<li>Exits are now provided for executing an user-defined
script when a chain is defined, when the firewall
is initialized, when the firewall is started,
when the firewall is stopped and when the firewall is
cleared.</li>
<li>The Linux kernel's route filtering facility
can now be specified selectively on network
interfaces.</li>
</ul>
<p><b>3/19/2001 - The current version of Shorewall is 1.0.4. This version:</b></p>
<ul>
<li>Allows user-defined zones. Shorewall now has
only one pre-defined zone (fw) with the remaining
zones being defined in the new configuration
file /etc/shorewall/zones. The /etc/shorewall/zones file
released in this version provides behavior that
is compatible with Shorewall 1.0.3.<2E></li>
<li>Adds the ability to specify logging in entries
in the /etc/shorewall/rules file.</li>
<li>Correct handling of the icmp-def chain so that
only ICMP packets are sent through the chain.</li>
<li>Compresses the output of "shorewall monitor"
if awk is installed. Allows the command to work
if awk isn't installed (although it's not pretty).</li>
</ul>
<p><b>3/13/2001 - The current version of Shorewall is 1.0.3. This is a bug-fix
release with no new features.</b></p>
<ul>
<li>The PATH variable in the firewall script now
includes /usr/local/bin and /usr/local/sbin.</li>
<li>DMZ-related chains are now correctly deleted
if the DMZ is deleted.</li>
<li>The interface OPTIONS for "gw" interfaces
are no longer ignored.</li>
</ul>
<p><b>3/8/2001 - The current version of Shorewall is 1.0.2. It supports an
additional "gw" (gateway) zone for
tunnels and it supports IPSEC tunnels with
end-points on the firewall. There is also a .lrp available
now.</b></p>
<p><font size="2">Updated 7/7/2003 - <a href="support.htm">Tom Eastep</a>
</font></p>
<p><a href="copyright.htm"><font size="2"> Copyright</font> <20> <font
size="2">2001, 2002 Thomas M. Eastep.</font></a><br>
</p>
<br>
<br>
<br>
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