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More tcfilter documentation

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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@8320 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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docs/traffic_shaping.xml
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@ -1334,6 +1334,111 @@ qt ip link set dev ifb0 up</programlisting></para>
2:110 - 206.124.146.179 #SNAT Responses
2:110 - 206.124.146.180 #Work Laptop
2:130 - 206.124.146.177 tcp 25 #Incoming Email.</programlisting></para>
<para>You can examine the installed filters with the <command>shorewall
show filters</command> command. What follows shows the output for
<filename class="devicefile">eth0</filename> with the filters shown
above. <emphasis role="bold">Bold font</emphasis> are comments
explaining the rules.<programlisting>gateway:~ # shorewall-lite show filters
Shorewall Lite 4.1.6 Clasifiers at gateway - Thu Mar 20 16:38:10 PDT 2008
Device eth1:
Device eth2:
Device eth0:
filter parent 1: protocol ip pref 10 u32
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 2:</emphasis> ht divisor 1 <emphasis
role="bold"> &lt;========= Start of table 2. parses TCP header</emphasis>
<emphasis role="bold"> </emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 2::800</emphasis> order 2048 key ht 2 bkt 0 <emphasis
role="bold">flowid 1:130</emphasis> (rule hit 2268 success 0)
match c1210000/ffff0000 at nexthdr+0 (success 0 ) <emphasis
role="bold"> &lt;========= SOURCE PORT 49441 goes to class 1:130</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 2::801</emphasis> order 2049 key ht 2 bkt 0 flowid <emphasis
role="bold">1:130</emphasis> (rule hit 2268 success 546)
match 03690000/ffff0000 at nexthdr+0 (success 546 ) <emphasis
role="bold"> &lt;========= SOURCE PORT 873 goes to class 1:130</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 1:</emphasis> ht divisor 1 <emphasis
role="bold"> &lt;========= Start of table 1. parses ICMP header</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 1::800</emphasis> order 2048 key ht 1 bkt 0 <emphasis
role="bold">flowid 1:110</emphasis> (rule hit 16 success 10)
match 08000000/ff000000 at nexthdr+0 (success 10 ) <emphasis
role="bold"> &lt;========= echo-request goes to class 1:110</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 1::801</emphasis> order 2049 key ht 1 bkt 0 flowid 1:110 (rule hit 6 success 6)
match 00000000/ff000000 at nexthdr+0 (success 6 ) <emphasis
role="bold">&lt;========= echo-reply goes to class 1:110
</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800:</emphasis> ht divisor 1 <emphasis
role="bold">&lt;========= Start of Table 800. Packets start here!</emphasis>
<emphasis role="bold">=============== The following 2 rules are generated by the class definition in /etc/shorewall/classes ==================</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::800</emphasis> order 2048 key ht 800 bkt 0 <emphasis
role="bold">flowid </emphasis><emphasis role="bold">1:110</emphasis> (rule hit 19434 success 1686)
match 00060000/00ff0000 at 8 (success 5359 ) <emphasis
role="bold">&lt;========= TCP </emphasis>
match 05000000/0f00ffc0 at 0 (success 2867 ) <emphasis
role="bold">&lt;========= Header length 20 and Packet Length &lt; 64</emphasis>
match 00100000/00ff0000 at 32 (success 1686 ) <emphasis
role="bold">&lt;========= ACK</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::801</emphasis> order 2049 key ht 800 bkt 0 <emphasis
role="bold">flowid 1:110</emphasis> (rule hit 17748 success 16)
match 00100000/00100000 at 0 (success 16 ) <emphasis
role="bold">&lt;========= Minimize-delay</emphasis><emphasis
role="bold"> jumps to class 1:110</emphasis>
<emphasis role="bold"> =============== Jump to Table 2 if the matches are met ==================</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::807</emphasis> order 2055 key ht 800 bkt 0 <emphasis
role="bold">link 2:</emphasis> (rule hit 5853 success 0)
match ce7c92b2/ffffffff at 12 (success 0 ) <emphasis
role="bold">&lt;========= SOURCE 206.124.146.178 </emphasis>
match 00060000/00ff0000 at 8 (success 0 ) <emphasis
role="bold">&lt;========= PROTO TCP</emphasis>
offset 0f00&gt;&gt;6 at 0 eat
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::802</emphasis> order 2050 key ht 800 bkt 0 <emphasis
role="bold">flowid 1:110 </emphasis> (rule hit 17732 success 3800)
match ce7c92b2/ffffffff at 12 (success 3800 ) <emphasis
role="bold">&lt;========= SOURCE 206.124.146.178 goes to class 1:110</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::803</emphasis> order 2051 key ht 800 bkt 0 <emphasis
role="bold">flowid 1:110</emphasis> (rule hit 13932 success 1058)
match ce7c92b3/ffffffff at 12 (success 1058 ) <emphasis
role="bold">&lt;========= SOURCE 206.124.146.179 goes to class 1:110</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::804</emphasis> order 2052 key ht 800 bkt 0 flowid 1:110 (rule hit 12874 success 7005)
match ce7c92b4/ffffffff at 12 (success 7005 ) <emphasis
role="bold">&lt;========= SOURCE 206.124.146.180 goes to class 1:110</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::805</emphasis> order 2053 key ht 800 bkt 0 <emphasis
role="bold">link 1:</emphasis> (rule hit 5869 success 0)
match 00010000/00ff0000 at 8 (success 16 ) <emphasis
role="bold">&lt;========= PROTO ICMP</emphasis> <emphasis
role="bold">jumps to Table 1</emphasis>
offset 0f00&gt;&gt;6 at 0 eat
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::806</emphasis> order 2054 key ht 800 bkt 0 <emphasis
role="bold">link 1: </emphasis> (rule hit 5853 success 0)
match 00010000/00ff0000 at 8 (success 0 ) <emphasis
role="bold">&lt;========= PROTO ICMP jumps to Table 1 (Shorewall-perl isn't</emphasis>
offset 0f00&gt;&gt;6 at 0 eat <emphasis
role="bold">smart enough yet to suppress this duplicate rule)</emphasis>
<emphasis role="bold"> =============== Jump to Table 2 if the matches are met ==================</emphasis>
filter parent 1: protocol ip pref 10 u32 <emphasis role="bold">fh 800::808</emphasis> order 2056 key ht 800 bkt 0 <emphasis
role="bold">link 2: </emphasis> (rule hit 5853 success 0)
match ce7c92b1/ffffffff at 12 (success 5654 ) <emphasis
role="bold">&lt;========= SOURCE 206.124.146.177</emphasis>
match 00060000/00ff0000 at 8 (success 2268 ) <emphasis
role="bold">&lt;========= PROTO TCP</emphasis>
offset 0f00&gt;&gt;6 at 0 eat</programlisting></para>
</section>
</section>