forked from extern/shorewall_code
Add 'default_rt' option
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@9249 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep
parent
d4d8d79dc2
commit
ee6cdfe001
@ -253,6 +253,21 @@ our $mode;
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our $family;
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#
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# These are the zone-oriented builtin targets
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#
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our %builtin_target = ( ACCEPT => 1,
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REJECT => 1,
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DROP => 1,
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RETURN => 1,
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DNAT => 1,
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SAME => 1,
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LOG => 1,
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NFLOG => 1,
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QUEUE => 1,
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NFQUEUE => 1,
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REDIRECT => 1 );
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#
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# Initialize globals -- we take this novel approach to globals initialization to allow
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# the compiler to run multiple times in the same process. The
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@ -494,7 +509,7 @@ sub add_jump( $$$;$ ) {
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#
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# Ensure that we have the chain unless it is a builtin like 'ACCEPT'
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#
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$toref = ensure_chain( $fromref->{table} , $to ) unless ( $targets{$to} || 0 ) & STANDARD;
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$toref = ensure_chain( $fromref->{table} , $to ) unless $builtin_target{ $to };
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}
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#
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@ -525,7 +540,6 @@ sub insert_rule($$$)
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$iprangematch = 0;
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$chainref->{referenced} = 1;
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}
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#
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@ -769,7 +783,7 @@ sub new_chain($$)
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{
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my ($table, $chain) = @_;
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fatal_error "Internal error in new_chain()" if $chain_table{$table}{$chain};
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fatal_error "Internal error in new_chain()" if $chain_table{$table}{$chain} || $builtin_target{ $chain };
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$chain_table{$table}{$chain} = { name => $chain,
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rules => [],
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@ -1136,33 +1150,29 @@ sub newexclusionchain() {
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# one for destination exclusion.
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#
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sub source_exclusion( $$ ) {
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my ( $exclusions, $targetref ) = @_;
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my ( $exclusions, $target ) = @_;
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return $targetref unless @$exclusions;
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return $target unless @$exclusions;
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$targetref = ensure_filter_chain( $targetref, 0 ) unless reftype $targetref;
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my $chainref = new_chain( $targetref->{table}, newexclusionchain );
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my $chainref = new_chain( reftype $target ? $target->{table} : 'filter' , newexclusionchain );
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add_rule( $chainref, match_source_net( $_ ) . '-j RETURN' ) for @$exclusions;
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add_jump( $chainref, $targetref, 1 );
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add_jump( $chainref, $target, 1 );
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reftype $_[1] ? $chainref : $chainref->{name};
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reftype $target ? $chainref : $chainref->{name};
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}
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sub dest_exclusion( $$ ) {
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my ( $exclusions, $targetref ) = @_;
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my ( $exclusions, $target ) = @_;
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return $targetref unless @$exclusions;
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return $target unless @$exclusions;
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$targetref = ensure_filter_chain( $targetref, 0 ) unless reftype $targetref;
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my $chainref = new_chain( $targetref->{table}, newexclusionchain );
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my $chainref = new_chain( reftype $target ? $target->{table} : 'filter' , newexclusionchain );
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add_rule( $chainref, match_dest_net( $_ ) . '-j RETURN' ) for @$exclusions;
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add_jump( $chainref, $targetref, 1 );
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add_jump( $chainref, $target, 1 );
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reftype $_[1] ? $targetref : $targetref->{name};
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reftype $target ? $chainref : $chainref->{name};
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}
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sub clearrule() {
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@ -299,7 +299,7 @@ sub initialize( $ ) {
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LOGPARMS => '',
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TC_SCRIPT => '',
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EXPORT => 0,
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VERSION => "4.2.4-RC3",
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VERSION => "4.2.4",
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CAPVERSION => 40203 ,
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);
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#
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@ -995,7 +995,7 @@ sub create_temp_object( $ ) {
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fatal_error "A compiled script may not be named 'shorewall'" if "$file" eq 'shorewall' && $suffix eq '';
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eval {
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$dir = abs_path $dir;
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$dir = abs_path $dir unless $dir =~ m|^/|; # Work around http://rt.cpan.org/Public/Bug/Display.html?id=1385
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( $object, $tempfile ) = tempfile ( 'tempfileXXXX' , DIR => $dir );
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};
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@ -462,6 +462,20 @@
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the INTERFACE column is assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>default_rt (Added in Shorewall-perl 4.2.5)</term>
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<listitem>
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<para>Indicates that a default route through the provider
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should be added to the default routing table (table 253).
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The route is added with a metric equal to the provider
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NUMBER so multiple providers can have this option. The
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option is ignored with a warning message if
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USE_DEFAULT_RT=Yes in
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<filename>shorewall.conf</filename>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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<para>For those of you who are terminally confused
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@ -1256,7 +1270,7 @@ wlan0 192.168.0.0/24</programlisting><note>
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</section>
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</section>
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<section>
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<section id="Complete">
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<title>A Complete Working Example</title>
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<para>This section describes the network at shorewall.net early in 2009.
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@ -1298,9 +1312,30 @@ wlan0 192.168.0.0/24</programlisting><note>
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<para>Because of the speed of the cable provider, all traffic uses that
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provider unless there is a specific need for the traffic to use the DSL
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line. As a consequence, I have disabled all route filtering on the
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line.</para>
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<itemizedlist>
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<listitem>
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<para>Responses to connections from the Internet to one of the DSL IP
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addresses -- the <emphasis role="bold">track</emphasis> option takes
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care of that.</para>
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</listitem>
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<listitem>
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<para>Connections initiated by the server and connection requested by
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clients on the firewall that have bound their local socket to one of
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the DSL IP addresses. Two entries in
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<filename>/etc/shorewall/route_rules</filename> take care of that
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traffic.</para>
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</listitem>
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</itemizedlist>
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<para>As a consequence, I have disabled all route filtering on the
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firewall and do not use the <emphasis role="bold">balance</emphasis>
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option in <filename>/etc/shorewall/providers</filename>.</para>
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option in <filename>/etc/shorewall/providers</filename>. The default route
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in the main table is established by DHCP. By specifying the
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<emphasis>default_rt</emphasis> option on Avvanta, I ensure that there is
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a default route when Comcast is down.</para>
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<para><filename>/etc/sysctl.conf</filename>:</para>
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@ -1309,7 +1344,7 @@ wlan0 192.168.0.0/24</programlisting><note>
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<para><filename>/etc/shorewall/providers</filename>:</para>
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<programlisting>#NAME NUMBER MARK DUPLICATE INTERFACE GATEWAY OPTIONS COPY
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Avvanta 1 0x100 main eth0 206.124.146.254 track,loose eth2,eth4,tun*
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Avvanta 1 0x100 main eth0 206.124.146.254 track,loose,default_rt eth2,eth4,tun*
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Comcast 2 0x200 main eth3 detect track eth2,eth4,tun*
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#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
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@ -1370,6 +1405,8 @@ default via 71.227.156.1 dev eth3 src 71.227.156.229
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Table default:
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default via 206.124.146.254 dev eth0 metric 1
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Table local:
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broadcast 127.255.255.255 dev lo proto kernel scope link src 127.0.0.1
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@ -1,4 +1,6 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.4//EN"
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"http://www.oasis-open.org/docbook/xml/4.4/docbookx.dtd">
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<refentry>
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<refmeta>
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<refentrytitle>shorewall-providers</refentrytitle>
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@ -199,7 +201,8 @@
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</varlistentry>
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<varlistentry>
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<term>src=<replaceable>source-address</replaceable></term>
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<term><emphasis
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role="bold">src=</emphasis><replaceable>source-address</replaceable></term>
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<listitem>
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<para>Added in Shorewall-perl 4.1.5. Specifies the source
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@ -213,7 +216,8 @@
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</varlistentry>
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<varlistentry>
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<term>mtu=<replaceable>number</replaceable></term>
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<term><emphasis
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role="bold">mtu=</emphasis><replaceable>number</replaceable></term>
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<listitem>
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<para>Added in Shorewall-perl 4.1.5. Specifies the MTU when
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@ -221,6 +225,20 @@
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interface named in the INTERFACE column is assumed.</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><emphasis role="bold">default_rt</emphasis></term>
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<listitem>
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<para>Added in Shorewall-perl 4.2.5. Indicates that a default
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route through the provider should be added to the default
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routing table (table 253). The route is added with a metric
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equal to the provider NUMBER so multiple providers can have
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this option. The option is ignored with a warning message if
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USE_DEFAULT_RT=Yes in
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<filename>shorewall.conf</filename>.</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</listitem>
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</varlistentry>
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@ -8,7 +8,7 @@
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<h1 style="text-align: left;">Shorewall Documentation</h1>
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<span style="font-weight: bold;">Tom Eastep</span><br>
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<span style="font-weight: bold;">
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</span>Copyright © 2005-2007 Thomas M. Eastep<br>
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</span>Copyright © 2005-2009 Thomas M. Eastep<br>
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<p>Permission is granted to copy, distribute and/or modify this
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document
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under the terms of the GNU Free Documentation License, Version 1.2 or
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@ -21,7 +21,7 @@ license is included in the section entitled “<span class="quote"><a
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href="GnuCopyright.htm" target="_self">GNU Free Documentation
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License</a></span>”.<br>
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</p>
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<p>2008-10-05<br>
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<p>2009-01-02<br>
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</p>
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<hr style="width: 100%; height: 2px;"> <strong></strong>
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<ul>
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@ -53,7 +53,7 @@ released with Shorewall 3.4.0 and later <br>
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<a href="/3.0/manpages/Manpages.html">Shorewall 3.x</a><br>
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<a href="/4.0/Manpages.html">Shorewall 4.0</a><br>
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<a href="Manpages.html">Shorewall 4.2</a><br>
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<a href="Manpages6.html">Shorewall6 4.x (IPv6 Support)</a><br>
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<a href="Manpages6.html">Shorewall6 4.2 (IPv6 Support)</a><br>
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<br>
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</li>
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<li><a href="shorewall_features.htm">Shorewall <span
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@ -70,11 +70,7 @@ Guide</a> -- Look here when "it doesn't work"<br>
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<li><strong>PPPPPPPS</strong> ( or, Paul's Principles for Practical
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Provision of Packet Processing with Shorewall ) <a
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href="http://linuxman.wikispaces.com/PPPPPPS">http://linuxman.wikispaces.com/PPPPPPS</a>
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-- Some very useful tips for dealing with Shorewall from Paul Gear<br>
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</li>
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-- Some very useful tips for dealing with Shorewall from Paul Gear</li>
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</ul>
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<div style="margin-left: 40px;">
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<a href="2.0/">Shorewall 2.x Documentation</a> </div>
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<br>
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</body>
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</html>
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