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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@684 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
202 lines
7.0 KiB
Plaintext
202 lines
7.0 KiB
Plaintext
This is a minor release of Shorewall.
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Problems Corrected:
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1) A problem seen on RH7.3 systems where Shorewall encountered start
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errors when started using the "service" mechanism has been worked
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around.
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2) Where a list of IP addresses appears in the DEST column of a DNAT[-]
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rule, Shorewall incorrectly created multiple DNAT rules in the nat
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table (one for each element in the list). Shorewall now correctly
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creates a single DNAT rule with multiple "--to-destination" clauses.
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3) Corrected a problem in Beta 1 where DNS names containing a "-" were
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mis-handled when they appeared in the DEST column of a rule.
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4) The handling of z1!z2 in the SOURCE column of DNAT and REDIRECT
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rules has been corrected.
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5) The message "Adding rules for DHCP" is now suppressed if there are
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no DHCP rules to add.
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6) Corrected problem in 1.4.6 where the MANGLE_ENABLED variable was
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being tested before it was set.
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7) Corrected handling of MAC addresses in the SOURCE column of the
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tcrules file. Previously, these addresses resulted in an invalid
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iptables command.
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8) The "shorewall stop" command is now disabled when
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/etc/shorewall/startup_disabled exists. This prevents people from
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shooting themselves in the foot prior to having configured
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Shorewall.
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9) A change introduced in version 1.4.6 caused error messages during
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"shorewall [re]start" when ADD_IP_ALIASES=Yes and ip addresses were
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being added to a PPP interface; the addresses were successfully
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added in spite of the messages.
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The firewall script has been modified to eliminate the error
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messages.
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Migration Issues:
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1) In earlier versions, an undocumented feature allowed entries in
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the host file as follows:
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z eth1:192.168.1.0/24,eth2:192.168.2.0/24
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This capability was never documented and has been removed in 1.4.6
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to allow entries of the following format:
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z eth1:192.168.1.0/24,192.168.2.0/24
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2) The NAT_ENABLED, MANGLE_ENABLED and MULTIPORT options have been
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removed from /etc/shorewall/shorewall.conf. These capabilities are
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now automatically detected by Shorewall (see below).
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New Features:
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1) A 'newnotsyn' interface option has been added. This option may be
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specified in /etc/shorewall/interfaces and overrides the setting
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NEWNOTSYN=No for packets arriving on the associated interface.
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2) The means for specifying a range of IP addresses in
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/etc/shorewall/masq to use for SNAT is now
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documented. ADD_SNAT_ALIASES=Yes is enabled for address ranges.
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3) Shorewall can now add IP addresses to subnets other than the first
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one on an interface.
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4) DNAT[-] rules may now be used to load balance (round-robin) over a
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set of servers. Any number of servers may be specified in a range of
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addresses given as <first address>-<last address> and multiple
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ranges or individual servers may be specified in a comma-separated
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list.
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Example:
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DNAT net loc:192.168.10.2-192.168.10.5,192.168.10.44 tcp 80
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5) The NAT_ENABLED, MANGLE_ENABLED and MULTIPORT configuration options
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have been removed and have been replaced by code that detects
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whether these capabilities are present in the current kernel. The
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output of the start, restart and check commands have been enhanced
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to report the outcome:
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Shorewall has detected the following iptables/netfilter capabilities:
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NAT: Available
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Packet Mangling: Available
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Multi-port Match: Available
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Verifying Configuration...
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6) Support for the Connection Tracking Match Extension has been
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added. This extension is available in recent kernel/iptables
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releases and allows for rules which match against elements in
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netfilter's connection tracking table.
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Shorewall automatically detects the availability of this extension
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and reports its availability in the output of the start, restart and
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check commands.
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Shorewall has detected the following iptables/netfilter capabilities:
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NAT: Available
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Packet Mangling: Available
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Multi-port Match: Available
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Connection Tracking Match: Available
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Verifying Configuration...
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If this extension is available, the ruleset generated by Shorewall
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is changed in the following ways:
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a) To handle 'norfc1918' filtering, Shorewall will not create chains
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in the mangle table but will rather do all 'norfc1918' filtering in
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the filter table (rfc1918 chain).
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b) Recall that Shorewall DNAT rules generate two netfilter rules;
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one in the nat table and one in the filter table. If the Connection
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Tracking Match Extension is available, the rule in the filter table
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is extended to check that the original destination address was the
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same as specified (or defaulted to) in the DNAT rule.
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7) The shell used to interpret the firewall script
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(/usr/share/shorewall/firewall) may now be specified using the
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SHOREWALL_SHELL parameter in shorewall.conf.
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8) An 'ipcalc' command has been added to /sbin/shorewall.
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ipcalc [ <address> <netmask> | <address>/<vlsm> ]
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Examples:
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[root@wookie root]# shorewall ipcalc 192.168.1.0/24
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CIDR=192.168.1.0/24
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NETMASK=255.255.255.0
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NETWORK=192.168.1.0
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BROADCAST=192.168.1.255
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[root@wookie root]#
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[root@wookie root]# shorewall ipcalc 192.168.1.0 255.255.255.0
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CIDR=192.168.1.0/24
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NETMASK=255.255.255.0
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NETWORK=192.168.1.0
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BROADCAST=192.168.1.255
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[root@wookie root]#
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Warning:
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If your shell only supports 32-bit signed arithmatic (ash or
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dash), then the ipcalc command produces incorrect information for
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IP addresses 128.0.0.0-1 and for /1 networks. Bash should produce
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correct information for all valid IP addresses.
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9) An 'iprange' command has been added to /sbin/shorewall.
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iprange <address>-<address>
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This command decomposes a range of IP addressses into a list of
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network and host addresses. The command can be useful if you need to
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construct an efficient set of rules that accept connections from a
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range of network addresses.
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Note: If your shell only supports 32-bit signed arithmetic (ash or
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dash) then the range may not span 128.0.0.0.
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Example:
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[root@gateway root]# shorewall iprange 192.168.1.4-192.168.12.9
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192.168.1.4/30
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192.168.1.8/29
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192.168.1.16/28
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192.168.1.32/27
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192.168.1.64/26
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192.168.1.128/25
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192.168.2.0/23
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192.168.4.0/22
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192.168.8.0/22
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192.168.12.0/29
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192.168.12.8/31
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[root@gateway root]#
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10) A list of host/net addresses is now allowed in an entry in
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/etc/shorewall/hosts.
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Example:
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foo eth1:192.168.1.0/24,192.168.2.0/24
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11) The "shorewall check" command now includes the chain name when
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printing the applicable policy for each pair of zones.
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Example:
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Policy for dmz to net is REJECT using chain all2all
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This means that the policy for connections from the dmz to the
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internet is REJECT and the applicable entry in the
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/etc/shorewall/policy was the all->all policy.
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12) Support for the 2.6 Kernel series has been added.
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