3/14/2003 - Shorewall 1.4.0
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.
IMPORTANT: Shorewall 1.4.0 REQUIRES the iproute package
('ip' utility).
Function from 1.3 that has been omitted from this version include:
- The "check" command is no longer supported.
- 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.
- Interface names of the form <device>:<integer> in /etc/shorewall/interfaces
now generate an error.
- 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.
- 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.
- The Shorewall 1.2 syntax for DNAT and REDIRECT rules is no longer
accepted.
- The ALLOWRELATED variable in shorewall.conf is no longer supported.
Shorewall 1.4 behavior is the same as 1.3 with ALLOWRELATED=Yes.
- The icmp.def file has been removed.
Changes for 1.4 include:
- The /etc/shorewall/shorewall.conf file has been completely reorganized
into logical sections.
- LOG is now a valid action for a rule (/etc/shorewall/rules).
- The firewall script and version file are now installed in /usr/share/shorewall.
- Late arriving DNS replies are now silently dropped in the common
chain by default.
- 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.
2/8/2003 - Shoreawall 1.3.14
New features include
- 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).
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.
- It is now possible to direct Shorewall to create a "label"
such as "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:
a) In the INTERFACE column of /etc/shorewall/masq
b) In the INTERFACE column of /etc/shorewall/nat
- Support for OpenVPN Tunnels.
- Support for VLAN devices with names of the form $DEV.$VID (e.g.,
eth0.0)
- 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 shorewall.conf.
- 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:
a) The subnets associated with other addresses on the interface.
b) Subnets accessed through local routers.
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.
Example 1 -- This is how it works in 1.3.14.
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]# shorewall start
...
Masqueraded Subnets and Hosts:
To 0.0.0.0/0 from 192.168.1.0/24 through eth0 using 206.124.146.176
To 0.0.0.0/0 from 192.168.10.0/24 through eth0 using 206.124.146.176
Processing /etc/shorewall/tos...
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.
Example 2 -- Suppose that your current config is as follows:
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
eth0 192.168.10.0/24 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]#
In this case, the second entry in /etc/shorewall/masq is
no longer required.
Example 3 -- What if your current configuration is like this?
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]#
In this case, you would want to change the entry in /etc/shorewall/masq
to:
#INTERFACE SUBNET ADDRESS
eth0 192.168.1.0/24 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
2/5/2003 - Shorewall Support included in Webmin 1.060
Webmin version 1.060 now has Shorewall support included as standard. See
http://www.webmin.com.
2/4/2003 - Shorewall 1.3.14-RC1
Includes the Beta 2 content plus support for OpenVPN tunnels.
1/28/2003 - Shorewall 1.3.14-Beta2
Includes the Beta 1 content plus restores VLAN device names of the form
$dev.$vid (e.g., eth0.1)
1/25/2003 - Shorewall 1.3.14-Beta1
The Beta includes the following changes:
- 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).
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.
- It is now possible to direct Shorewall to create a "label"
such as "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:
a) In the INTERFACE column of /etc/shorewall/masq
b) In the INTERFACE column of /etc/shorewall/nat
- 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:
a) The subnets associated with other addresses on the interface.
b) Subnets accessed through local routers.
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.
Example 1 -- This is how it works in 1.3.14.
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]# shorewall start
...
Masqueraded Subnets and Hosts:
To 0.0.0.0/0 from 192.168.1.0/24 through eth0 using 206.124.146.176
To 0.0.0.0/0 from 192.168.10.0/24 through eth0 using 206.124.146.176
Processing /etc/shorewall/tos...
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.
Example 2 -- Suppose that your current config is as follows:
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
eth0 192.168.10.0/24 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]#
In this case, the second entry in /etc/shorewall/masq is
no longer required.
Example 3 -- What if your current configuration is like this?
[root@gateway test]# cat /etc/shorewall/masq
#INTERFACE SUBNET ADDRESS
eth0 eth2 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
[root@gateway test]# ip route show dev eth2
192.168.1.0/24 scope link
192.168.10.0/24 proto kernel scope link src 192.168.10.254
[root@gateway test]#
In this case, you would want to change the entry in /etc/shorewall/masq
to:
#INTERFACE SUBNET ADDRESS
eth0 192.168.1.0/24 206.124.146.176
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE
1/18/2003 - Shorewall 1.3.13 Documentation in PDF Format
Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.13 documenation.
the PDF may be downloaded from
ftp://slovakia.shorewall.net/mirror/shorewall/pdf/
http://slovakia.shorewall.net/pub/shorewall/pdf/
1/17/2003 - shorewall.net has MOVED
Thanks to the generosity of Alex Martin and Rett Consulting, 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.
1/13/2003 - Shorewall 1.3.13
Just includes a few things that I had on the burner:
- 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.
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.
Here are three rules from my previous rules file:
DNAT net dmz:206.124.146.177 tcp smtp - 206.124.146.178
DNAT net dmz:206.124.146.177 tcp smtp - 206.124.146.179
ACCEPT net dmz:206.124.146.177 tcp www,smtp,ftp,...
These three rules ended up generating _three_ copies
of
ACCEPT net dmz:206.124.146.177 tcp smtp
By writing the rules this way, I end up with only one
copy of the ACCEPT rule.
DNAT- net dmz:206.124.146.177 tcp smtp - 206.124.146.178
DNAT- net dmz:206.124.146.177 tcp smtp - 206.124.146.179
ACCEPT net dmz:206.124.146.177 tcp www,smtp,ftp,....
- The 'shorewall check' command now prints out the applicable
policy between each pair of zones.
- 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.
- 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.
1/6/2003 - BURNOUT
Until further notice, I will not be involved in either Shorewall Development
or Shorewall Support
-Tom Eastep
12/30/2002 - Shorewall Documentation in PDF Format
Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.12 documenation.
the PDF may be downloaded from
ftp://slovakia.shorewall.net/mirror/shorewall/pdf/
http://slovakia.shorewall.net/pub/shorewall/pdf/
12/27/2002 - Shorewall 1.3.12 Released
Features include:
- "shorewall refresh" now reloads the traffic shaping
rules (tcrules and tcstart).
- "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.
- "shorewall [re]start" has been speeded up by more
than 40% with my configuration. Your milage may vary.
- 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"
- 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 http://www.gnumonks.org/projects/ulogd)
and log all Shorewall messages to a separate log file.
- 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.
- 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.
- I have added a new RFC1918_LOG_LEVEL variable to
shorewall.conf. 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.
12/20/2002 - Shorewall 1.3.12 Beta 3
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.
12/20/2002 - Shorewall 1.3.12 Beta 2
The first public Beta version of Shorewall 1.3.12 is now available (Beta
1 was made available only to a limited audience).
Features include:
- "shorewall refresh" now reloads the traffic
shaping rules (tcrules and tcstart).
- "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.
- "shorewall [re]start" has been speeded up
by more than 40% with my configuration. Your milage may vary.
- 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"
- 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 http://www.gnumonks.org/projects/ulogd)
and log all Shorewall messages to a separate log file.
- 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.
- 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.
You may download the Beta from:
http://www.shorewall.net/pub/shorewall/Beta
ftp://ftp.shorewall.net/pub/shorewall/Beta
12/12/2002 - Mandrake Multi Network Firewall 
Shorewall is at the center of MandrakeSoft's
recently-announced Multi
Network Firewall (MNF) product. Here is the press
release.
12/7/2002 - Shorewall Support for Mandrake 9.0
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.
12/6/2002 - Debian 1.3.11a Packages Available
Apt-get sources listed at http://security.dsi.unimi.it/~lorenzo/debian.html.
12/3/2002 - Shorewall 1.3.11a
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.
11/24/2002 - Shorewall 1.3.11
In this version:
- A 'tcpflags' option has been added
to entries in /etc/shorewall/interfaces.
This option causes Shorewall to make a set of sanity check on TCP
packet header flags.
- It is now allowed to use 'all' in the
SOURCE or DEST column in a rule. When used, 'all' must appear
by itself (in may not be qualified) and it does not enable intra-zone
traffic. For example, the rule
ACCEPT loc all tcp 80
does not enable http traffic from 'loc' to
'loc'.
- Shorewall's use of the 'echo' command
is now compatible with bash clones such as ash and dash.
- fw->fw policies now generate a startup
error. fw->fw rules generate a warning and are ignored
11/14/2002 - Shorewall Documentation in PDF Format
Juraj Ontkanin has produced a PDF containing the Shorewall 1.3.10 documenation.
the PDF may be downloaded from
ftp://slovakia.shorewall.net/mirror/shorewall/pdf/
http://slovakia.shorewall.net/pub/shorewall/pdf/
11/09/2002 - Shorewall is Back at SourceForge
The main Shorewall 1.3 web site is now back at SourceForge at http://shorewall.sf.net.
11/09/2002 - Shorewall 1.3.10
In this version:
10/24/2002 - Shorewall is now in Gentoo Linux
Alexandru Hartmann reports that his
Shorewall package is now a part of the Gentoo Linux distribution.
Thanks Alex!
10/23/2002 - Shorewall 1.3.10 Beta 1
In this version:
You may download the Beta from:
10/10/2002 - Debian 1.3.9b Packages Available
Apt-get sources listed at http://security.dsi.unimi.it/~lorenzo/debian.html.
10/9/2002 - Shorewall 1.3.9b
This release rolls up fixes to the
installer and to the firewall script.
10/6/2002 - Shorewall.net now running on RH8.0
The firewall and server here at shorewall.net
are now running RedHat release 8.0.
9/30/2002 - Shorewall 1.3.9a
Roles up the fix for broken tunnels.
9/30/2002 - TUNNELS Broken in 1.3.9!!!
There is an updated firewall script
at ftp://www.shorewall.net/pub/shorewall/errata/1.3.9/firewall
-- copy that file to /usr/lib/shorewall/firewall.
9/28/2002 - Shorewall 1.3.9
In this version:
- DNS Names are
now allowed in Shorewall config files (although I recommend against
using them).
- The connection SOURCE
may now be qualified by both interface and IP address
in a Shorewall rule.
- 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.
- 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.
9/23/2002 - Full Shorewall Site/Mailing List Archive Search Capability
Restored
A couple of recent configuration
changes at www.shorewall.net broke the Search facility:
- Mailing List Archive
Search was not available.
- The Site Search index
was incomplete
- Only one page of matches
was presented.
Hopefully these problems
are now corrected.
9/23/2002 - Full Shorewall Site/Mailing List Archive Search Capability
Restored
A couple of recent configuration
changes at www.shorewall.net had the negative effect
of breaking the Search facility:
- Mailing List Archive
Search was not available.
- The Site Search index
was incomplete
- Only one page of matches
was presented.
Hopefully these problems are
now corrected.
9/18/2002 - Debian 1.3.8 Packages Available
Apt-get sources listed at http://security.dsi.unimi.it/~lorenzo/debian.html.
9/16/2002 - Shorewall 1.3.8
In this version:
- A NEWNOTSYN 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).
- 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:
- There is
a policy for za to zb; or
- There is at least
one rule for za to zb.
- 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.
9/11/2002 - Debian 1.3.7c Packages Available
Apt-get sources listed at http://security.dsi.unimi.it/~lorenzo/debian.html.
9/2/2002 - Shorewall 1.3.7c
This is a role up of a fix for "DNAT" rules where the source zone is $FW
(fw).
8/31/2002 - I'm not available
I'm currently on vacation -- please respect my need for a couple of
weeks free of Shorewall problem reports.
-Tom
8/26/2002 - Shorewall 1.3.7b
This is a role up of the "shorewall refresh" bug fix and the change which
reverses the order of "dhcp" and "norfc1918" checking.
8/26/2002 - French FTP Mirror is Operational
ftp://france.shorewall.net/pub/mirrors/shorewall
is now available.
8/25/2002 - Shorewall Mirror in France
Thanks to a Shorewall user in Paris, the Shorewall web site is now mirrored
at http://france.shorewall.net.
8/25/2002 - Shorewall 1.3.7a Debian Packages Available
Lorenzo Martignoni reports that the packages for version 1.3.7a are available
at http://security.dsi.unimi.it/~lorenzo/debian.html.
8/22/2002 - Shorewall 1.3.7 Wins a Brown Paper Bag Award for its Author
-- Shorewall 1.3.7a released
1.3.7a corrects problems occurring in rules file processing when starting
Shorewall 1.3.7.
8/22/2002 - Shorewall 1.3.7 Released 8/13/2002
Features in this release include:
- 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 shorewall.conf should see the
Upgrade Issues.
- A 'FORWARDPING'
option has been added to
shorewall.conf. The effect of setting this
variable to Yes is the same as the effect of adding an ACCEPT
rule for ICMP echo-request in /etc/shorewall/icmpdef.
Users who have such a rule in icmpdef are encouraged
to switch to FORWARDPING=Yes.
- The loopback CLASS
A Network (127.0.0.0/8) has been added to the rfc1918
file.
- Shorewall now works
with iptables 1.2.7
- The documentation
and web site no longer uses FrontPage themes.
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.
8/13/2002 - Documentation in the CVS Repository
The Shorewall-docs project now contains just the HTML and image files -
the Frontpage files have been removed.
8/7/2002 - STABLE branch added to CVS Repository
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.
8/7/2002 - Upgrade Issues section added
to the Errata Page
Now there is one place to go to look for issues involved with upgrading
to recent versions of Shorewall.
8/7/2002 - Shorewall 1.3.6
This is primarily a bug-fix rollup with a couple of new features:
7/30/2002 - Shorewall 1.3.5b Released
This interim release:
- Causes the firewall
script to remove the lock file if it is killed.
- Once again allows
lists in the second column of the /etc/shorewall/hosts file.
- Includes the latest
QuickStart Guides.
7/29/2002 - New Shorewall Setup Guide Available
The first draft of this guide is available at http://www.shorewall.net/shorewall_setup_guide.htm.
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.
7/28/2002 - Shorewall 1.3.5 Debian Package Available
Lorenzo Martignoni reports that the packages are version 1.3.5a and are
available at http://security.dsi.unimi.it/~lorenzo/debian.html.
7/27/2002 - Shorewall 1.3.5a Released
This interim release restores correct handling of REDIRECT rules.
7/26/2002 - Shorewall 1.3.5 Released
This will be the last Shorewall release for a while. I'm going to be
focusing on rewriting a lot of the documentation.
In this version:
- 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.
- Added MERGE_HOSTS
variable in shorewall.conf
to provide saner behavior of the /etc/shorewall/hosts
file.
- The time that the
counters were last reset is now displayed in the
heading of the 'status' and 'show' commands.
- A proxyarp option
has been added for entries in /etc/shorewall/interfaces.
This option facilitates Proxy ARP sub-netting as described in
the Proxy ARP subnetting mini-HOWTO (http://www.tldp.org/HOWTO/mini/Proxy-ARP-Subnet/).
Specifying the proxyarp option for an interface
causes Shorewall to set /proc/sys/net/ipv4/conf/<interface>/proxy_arp.
- The Samples have
been updated to reflect the new capabilities in this
release.
7/16/2002 - New Mirror in Argentina
Thanks to Arturo "Buanzo" Busleiman, there is now a Shorewall mirror in
Argentina. Thanks Buanzo!!!
7/16/2002 - Shorewall 1.3.4 Released
In this version:
- A new /etc/shorewall/routestopped
file has been added. This file is intended to
eventually replace the routestopped 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.
- An /etc/shorewall/stopped
extension script has
been added. This script is invoked after Shorewall has
stopped.
- A DETECT_DNAT_ADDRS
option has been added to /etc/shoreall/shorewall.conf.
When this option is selected, DNAT rules only apply when
the destination address is the external interface's
primary IP address.
- The QuickStart Guide has
been broken into three guides and has been almost entirely
rewritten.
- The Samples have
been updated to reflect the new capabilities in this
release.
7/8/2002 - Shorewall 1.3.3 Debian Package Available
Lorenzo Marignoni reports that the packages are available at http://security.dsi.unimi.it/~lorenzo/debian.html.
7/6/2002 - Shorewall 1.3.3 Released
In this version:
- Entries in /etc/shorewall/interface
that use the wildcard character ("+") now have
the "multi" option assumed.
- 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.
- Interface names
appearing in the hosts file are now validated against
the interfaces file.
- The TARGET column
in the rfc1918 file is now checked for correctness.
- 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
- The "hits" command
has been enhanced.
6/25/2002 - Samples Updated for 1.3.2
The comments in the sample configuration files have been updated to reflect
new features introduced in Shorewall 1.3.2.
6/25/2002 - Shorewall 1.3.1 Debian Package Available
Lorenzo Marignoni reports that the package is available at http://security.dsi.unimi.it/~lorenzo/debian.html.
6/19/2002 - Documentation Available in PDF Format
Thanks to Mike Martinez, the Shorewall Documentation is now available for
download in Adobe
PDF format.
6/16/2002 - Shorewall 1.3.2 Released
In this version:
6/6/2002 - Why CVS Web access is Password Protected
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:
- Ignore robot.txt
files.
- Recursively copy
everything that they find.
- Should be classified
as weapons rather than tools.
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.
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.
6/5/2002 - Shorewall 1.3.1 Debian Package Available
Lorenzo Marignoni reports that the package is available at http://security.dsi.unimi.it/~lorenzo/debian.html.
6/2/2002 - Samples Corrected
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 1.3.1 samples.
6/1/2002 - Shorewall 1.3.1 Released
Hot on the heels of 1.3.0, this release:
- Corrects a serious
problem with "all <zone> CONTINUE"
policies. This problem is present in all versions of Shorewall
that support the CONTINUE policy. These previous versions
optimized away the "all2<zone>" 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.
- Adds an /etc/shorewall/rfc1918
file for defining the exact behavior of the 'norfc1918' interface option.
5/29/2002 - Shorewall 1.3.0 Released
In addition to the changes in Beta 1, Beta 2 and RC1, Shorewall 1.3.0
includes:
- 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.
5/23/2002 - Shorewall 1.3 RC1 Available
In addition to the changes in Beta 1 and Beta 2, RC1 (Version 1.2.92)
incorporates the following:
- Support for the
/etc/shorewall/whitelist file has been withdrawn.
If you need whitelisting, see these instructions.
5/19/2002 - Shorewall 1.3 Beta 2 Available
In addition to the changes in Beta 1, this release which carries the
designation 1.2.91 adds:
- 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.
- Sub-zones may now be excluded
from DNAT and REDIRECT rules.
- 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.
- The sample configurations
have been updated for 1.3.
5/17/2002 - Shorewall 1.3 Beta 1 Available
Beta 1 carries the version designation 1.2.90 and implements the following
features:
- Simplified rule
syntax which makes the intent of each rule clearer
and hopefully makes Shorewall easier to learn.
- Upward compatibility
with 1.2 configuration files has been maintained so
that current users can migrate to the new syntax at their
convenience.
- WARNING: 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.
5/4/2002 - Shorewall 1.2.13 is Available
In this version:
4/30/2002 - Shorewall Debian News
Lorenzo Marignoni reports that Shorewall 1.2.12 is now in both the Debian
Testing Branch and the Debian
Unstable Branch.
4/20/2002 - Shorewall 1.2.12 is Available
- The 'try' command
works again
- There is now a single
RPM that also works with SuSE.
4/17/2002 - Shorewall Debian News
Lorenzo Marignoni reports that:
Thanks, Lorenzo!
4/16/2002 - Shorewall 1.2.11 RPM Available for SuSE
Thanks to Stefan Mohr, there
is now a Shorewall 1.2.11
SuSE RPM available.
4/13/2002 - Shorewall 1.2.11 Available
In this version:
- 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.
- Kernel route filtering
may now be enabled globally using the new ROUTE_FILTER
parameter in /etc/shorewall/shorewall.conf.
- Individual IP source
addresses and/or subnets may now be excluded from
masquerading/SNAT.
- Simple "Yes/No"
and "On/Off" values are now case-insensitive in
/etc/shorewall/shorewall.conf.
4/13/2002 - Hamburg Mirror now has FTP
Stefan now has an FTP mirror at ftp://germany.shorewall.net/pub/shorewall.
Thanks Stefan!
4/12/2002 - New Mirror in Hamburg
Thanks to Stefan Mohr, there
is now a mirror of the Shorewall website at http://germany.shorewall.net.
4/10/2002 - Shorewall QuickStart Guide Version 1.1 Available
Version 1.1 of the QuickStart
Guide 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.
4/9/2002 - Shorewall QuickStart Guide Version 1.0 Available
Version 1.0 of the QuickStart
Guide is now available. This Guide and its accompanying
sample configurations are expected to provide a replacement
for the recently withdrawn parameterized samples.
4/8/2002 - Parameterized Samples Withdrawn
Although the parameterized
samples 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.
4/2/2002 - Updated Log Parser
John Lodge has provided an updated
version of his CGI-based log parser
with corrected date handling.
3/30/2002 - Shorewall Website Search Improvements
The quick search on the home page now excludes the mailing list archives.
The Extended Search
allows excluding the archives or restricting the search
to just the archives. An archive search form is also available
on the mailing
list information page.
3/28/2002 - Debian Shorewall News (From Lorenzo Martignoni)
3/25/2002 - Log Parser Available
John Lodge has provided a CGI-based log parser for Shorewall. Thanks
John.
3/20/2002 - Shorewall 1.2.10 Released
In this version:
- A "shorewall try"
command has been added (syntax: shorewall try
<configuration directory>). This command
attempts "shorewall -c <configuration directory>
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 configuration 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).
- A new variable ADD_SNAT_ALIASES
has been added to /etc/shorewall/shorewall.conf.
If this variable is set to "Yes", Shorewall will
automatically add IP addresses listed in the third
column of the /etc/shorewall/masq
file.
- Copyright notices
have been added to the documenation.
3/11/2002 - Shorewall 1.2.9 Released
In this version:
3/1/2002 - 1.2.8 Debian Package is Available
See http://security.dsi.unimi.it/~lorenzo/debian.html
2/25/2002 - New Two-interface Sample
I've enhanced the two interface sample to allow access from the firewall
to servers in the local zone -
http://www.shorewall.net/pub/shorewall/LATEST.samples/two-interfaces.tgz
2/23/2002 - Shorewall 1.2.8 Released
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.
2/22/2002 - Shorewall 1.2.7 Released
In this version:
- UPnP probes (UDP
destination port 1900) are now silently dropped in
the common chain
- 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.
- A 'shorewall check'
command has been added that does a cursory validation
of the zones, interfaces, hosts, rules and policy files.
2/18/2002 - 1.2.6 Debian Package is Available
See http://security.dsi.unimi.it/~lorenzo/debian.html
2/8/2002 - Shorewall 1.2.6 Released
In this version:
- $-variables may
now be used anywhere in the configuration files except
/etc/shorewall/zones.
- 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.
- A problem occurring
when BLACKLIST_LOGLEVEL was not set has been corrected.
2/4/2002 - Shorewall 1.2.5 Debian Package Available
see http://security.dsi.unimi.it/~lorenzo/debian.html
2/1/2002 - Shorewall 1.2.5 Released
Due to installation problems with Shorewall 1.2.4, I have released Shorewall
1.2.5. Sorry for the rapid-fire development.
In version 1.2.5:
- The installation
problems have been corrected.
- SNAT is now supported.
- A "shorewall version"
command has been added
- 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.
1/28/2002 - Shorewall 1.2.4 Released
- The "fw" zone may now be given a different name.
- You may now place
end-of-line comments (preceded by '#') in any of the
configuration files
- 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".
- "shorewall start"
no longer fails if "detect" is specified in /etc/shorewall/interfaces
for an interface with subnet mask 255.255.255.255.
1/27/2002 - Shorewall 1.2.3 Debian Package Available -- see http://security.dsi.unimi.it/~lorenzo/debian.html
1/20/2002 - Corrected firewall script available
Corrects a problem with BLACKLIST_LOGLEVEL. See the
errata for details.
1/19/2002 - Shorewall 1.2.3 Released
This is a minor feature and bugfix release. The single new feature is:
- 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 CLAMPMSS
option in /etc/shorewall/shorewall.conf.
The following problems were corrected:
- The "shorewall status"
command no longer hangs.
- The "shorewall monitor"
command now displays the icmpdef chain
- The CLIENT PORT(S)
column in tcrules is no longer ignored
1/18/2002 - Shorewall 1.2.2 packaged with new LEAF release
Jacques Nilo and Eric Wolzak have released a kernel 2.4.16 LEAF distribution
that includes Shorewall 1.2.2. See http://leaf.sourceforge.net/devel/jnilo
for details.
1/11/2002 - Debian Package (.deb) Now Available - Thanks to Lorenzo Martignoni, a 1.2.2
Shorewall Debian package is now available. There is
a link to Lorenzo's site from the Shorewall download page.
1/9/2002 - Updated 1.2.2 /sbin/shorewall available - This corrected version restores
the "shorewall status" command to health.
1/8/2002 - Shorewall 1.2.2 Released
In version 1.2.2
- Support for IP blacklisting
has been added
- You specify whether
you want packets from blacklisted hosts dropped or
rejected using the BLACKLIST_DISPOSITION
setting in /etc/shorewall/shorewall.conf
- You specify whether
you want packets from blacklisted hosts logged and
at what syslog level using the BLACKLIST_LOGLEVEL
setting in /etc/shorewall/shorewall.conf
- You list the IP
addresses/subnets that you wish to blacklist in
/etc/shorewall/blacklist
- You specify the
interfaces you want checked against the blacklist
using the new "blacklist"
option in /etc/shorewall/interfaces.
- The black list
is refreshed from /etc/shorewall/blacklist by the
"shorewall refresh" command.
- Use of TCP RST replies
has been expanded
- TCP connection
requests rejected because of a REJECT policy are now
replied with a TCP RST packet.
- TCP connection
requests rejected because of a protocol=all rule in
/etc/shorewall/rules are now replied with a TCP RST
packet.
- A LOGFILE specification
has been added to /etc/shorewall/shorewall.conf. LOGFILE is used
to tell the /sbin/shorewall program where to look for Shorewall
messages.
1/5/2002 - New Parameterized Samples (version 1.2.0) released. These are minor updates
to the previously-released samples. There are two
new rules added:
- 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.
- Orphan DNS replies
are now silently dropped.
See the README file for upgrade instructions.
1/1/2002 - Shorewall Mailing List Moving
The Shorewall mailing list hosted at
Sourceforge is moving to Shorewall.net. If you
are a current subscriber to the list at Sourceforge, please
see these instructions.
If you would like to subscribe to the new list, visit
http://www.shorewall.net/mailman/listinfo/shorewall-users.
12/31/2001 - Shorewall 1.2.1 Released
In version 1.2.1:
12/21/2001 - Shorewall 1.2.0 Released! - I couldn't resist releasing
1.2 on 12/21/2001
Version 1.2 contains the following new features:
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.
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:
rpm -Uvh --oldpackage shorewall-1.2-0.noarch.rpm
12/19/2001 - Thanks to Steve
Cowles, there is now a Shorewall mirror in Texas.
This web site is mirrored at http://www.infohiiway.com/shorewall
and the ftp site is at ftp://ftp.infohiiway.com/pub/mirrors/shorewall.
11/30/2001 - A new set of the parameterized Sample
Configurations has been released. In this version:
- Ping is now allowed
between the zones.
- In the three-interface
configuration, it is now possible to configure the
internet services that are to be available to servers in
the DMZ.
11/20/2001 - The current version of Shorewall is 1.1.18.
In this version:
- The spelling of ADD_IP_ALIASES
has been corrected in the shorewall.conf file
- The logic for deleting
user-defined chains has been simplified so that it
avoids a bug in the LRP version of the 'cut' utility.
- The /var/lib/lrpkg/shorwall.conf
file has been corrected to properly display the
NAT entry in that file.
11/19/2001 - Thanks to Juraj
Ontkanin, there is now a Shorewall mirror
in the Slovak Republic. The website is now mirrored
at http://www.nrg.sk/mirror/shorewall
and the FTP site is mirrored at ftp://ftp.nrg.sk/mirror/shorewall.
11/2/2001 - Announcing Shorewall Parameter-driven Sample Configurations.
There are three sample configurations:
- One Interface --
for a standalone system.
- Two Interfaces --
A masquerading firewall.
- Three Interfaces
-- A masquerading firewall with DMZ.
Samples may be downloaded from ftp://ftp.shorewall.net/pub/shorewall/samples-1.1.17
. See the README file for instructions.
11/1/2001 - The current version of Shorewall is 1.1.17. I intend
this to be the last of the 1.1 Shorewall
releases.
In this version:
10/22/2001 - The current version of Shorewall is 1.1.16. In this
version:
- A new "shorewall
show connections" command has been added.
- In the "shorewall
monitor" output, the currently tracked connections
are now shown on a separate page.
- 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 (ADD_IP_ALIASES) 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.
10/15/2001 - The current version of Shorewall is 1.1.15. In this
version:
- Support for nested
zones has been improved. See the documentation for
details
- Shorewall now correctly
checks the alternate configuration directory for
the 'zones' file.
10/4/2001 - The current version of Shorewall is 1.1.14. In this
version
- 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:
1. Create a New Directory
2. Copy to that directory
any of your configuration files that you want to
change.
3. Modify the copied
files as needed.
4. Restart Shorewall
specifying the new directory.
- 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.
- Rules that specify
multiple client ip addresses or subnets no longer cause
startup failures.
- Zone names in the
policy file are now validated against the zones file.
- If you have packet mangling support
enabled, the "norfc1918"
interface option now logs and drops any incoming packets
on the interface that have an RFC 1918 destination
address.
9/12/2001 - The current version of Shorewall is 1.1.13. In this
version
- Shell variables can
now be used to parameterize Shorewall rules.
- The second column
in the hosts file may now contain a comma-separated
list.
Example:
sea eth0:130.252.100.0/24,206.191.149.0/24
- Handling of multi-zone
interfaces has been improved. See the documentation for the /etc/shorewall/interfaces
file.
8/28/2001 - The current version of Shorewall is 1.1.12. In this
version
- Several columns in
the rules file may now contain comma-separated lists.
- Shorewall is now
more rigorous in parsing the options in /etc/shorewall/interfaces.
- Complementation using
"!" is now supported in rules.
7/28/2001 - The current version of Shorewall is 1.1.11. In this
version
- 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.
- 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.
- The "dhcp" interface
option is now applicable to firewall interfaces used
by a DHCP server running on the firewall.
- The RPM can now be
built from the .tgz file using "rpm -tb"
7/6/2001 - The current version of Shorewall is 1.1.10. In this version
- 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.
- The "shorewall hits"
command no longer lists extraneous service names
in its last report.
- Erroneous instructions
in the comments at the head of the firewall script
have been corrected.
6/23/2001 - The current version of Shorewall is 1.1.9. In this version
- The "tunnels" file
really is in the RPM now.
- SNAT can now be applied
to port-forwarded connections.
- A bug which would
cause firewall start failures in some dhcp configurations
has been fixed.
- 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.
- You can now configure
Shorewall so that it doesn't
require the NAT and/or mangle netfilter modules.
- Thanks to Alex Polishchuk,
the "hits" command from seawall is now in shorewall.
- Support for IPIP tunnels has been added.
6/18/2001 - The current version of Shorewall is 1.1.8. In this version
6/2/2001 - The current version of Shorewall is 1.1.7. In this version
- The TOS rules are
now deleted when the firewall is stopped.
- The .rpm will now
install regardless of which version of iptables is
installed.
- The .rpm will now
install without iproute2 being installed.
- The documentation
has been cleaned up.
- The sample configuration
files included in Shorewall have been formatted
to 80 columns for ease of editing on a VGA console.
5/25/2001 - The current version of Shorewall is 1.1.6. In this version
- You may now rate-limit the
packet log.
- Previous versions
of Shorewall have an implementation of Static NAT which
violates the principle of least surprise. 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 "ALL INTERFACES" column to /etc/shorewall/nat.
By placing "no" or "No" in the new column, the NAT behavior
of prior versions may be retained.
- The treatment of
IPSEC Tunnels where the remote
gateway is a standalone system has been improved. 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.
5/20/2001 - The current version of Shorewall is 1.1.5. In this version
5/10/2001 - The current version of Shorewall is 1.1.4. In this version
- Accepting RELATED connections
is now optional.
- Corrected problem
where if "shorewall start" aborted early (due to
kernel configuration errors for example), superfluous 'sed'
error messages were reported.
- Corrected rules generated
for port redirection.
- The order in which
iptables kernel modules are loaded has been corrected
(Thanks to Mark Pavlidis).
4/28/2001 - The current version of Shorewall is 1.1.3. In this version
- Correct message issued
when Proxy ARP address added (Thanks to Jason Kirtland).
- /tmp/shorewallpolicy-$$
is now removed if there is an error while starting
the firewall.
- /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.
- 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.
- 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.
- 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.
- Previously, placing
"-" in the PORT(S) column in /etc/shorewall/rules resulted
in an error message during start. This has been corrected.
- The first line of
"install.sh" has been corrected -- I had inadvertently
deleted the initial "#".
4/12/2001 - The current version of Shorewall is 1.1.2. In this version
- Port redirection
now works again.
- The icmpdef and common
chains may now be user-defined.
- 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.
- The LRP Version is
renamed "shorwall" for 8,3 MSDOS file system compatibility.
- A couple of LRP-specific
problems were corrected.
4/8/2001 - Shorewall is now affiliated with the Leaf Project 
4/5/2001 - The current version of Shorewall is 1.1.1. In this version:
- The common chain
is traversed from INPUT, OUTPUT and FORWARD before
logging occurs
- The source has been
cleaned up dramatically
- 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.
3/25/2001 - The current version of Shorewall is 1.1.0. In this version:
- Log messages now
indicate the packet disposition.
- Error messages have
been improved.
- The ability to define
zones consisting of an enumerated set of hosts
and/or subnetworks has been added.
- The zone-to-zone
chain matrix is now sparse so that only those chains
that contain meaningful rules are defined.
- 240.0.0.0/4 and 169.254.0.0/16
have been added to the source subnetworks whose
packets are dropped under the norfc1918 interface
option.
- 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.
- The Linux kernel's
route filtering facility can now be specified
selectively on network interfaces.
3/19/2001 - The current version of Shorewall is 1.0.4. This version:
- 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.
- Adds the ability
to specify logging in entries in the /etc/shorewall/rules
file.
- Correct handling
of the icmp-def chain so that only ICMP packets are
sent through the chain.
- 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).
3/13/2001 - The current version of Shorewall is 1.0.3. This is a bug-fix
release with no new features.
- The PATH variable
in the firewall script now includes /usr/local/bin
and /usr/local/sbin.
- DMZ-related chains
are now correctly deleted if the DMZ is deleted.
- The interface OPTIONS
for "gw" interfaces are no longer ignored.
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.
Updated 2/13/2003 - Tom Eastep
Copyright © 2001, 2002 Thomas M. Eastep.