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git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@9255 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
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teastep 2009-01-07 16:25:14 +00:00
parent 7dd04d8460
commit ba8a0976f1
1 changed files with 37 additions and 23 deletions
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50
docs/MultiISP.xml
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@ -306,8 +306,8 @@
<para>You want to specify 'track' if Internet hosts will be
connecting to local servers through this provider. Any time
that you specify 'track', you will also want to specify
'balance' (see below).</para>
that you specify 'track', you will normally want to also
specify 'balance' (see below).</para>
<para>Use of this feature requires that your kernel and
iptables include CONNMARK target and connmark match support
@ -371,9 +371,10 @@
specify 'balance' even if you don't need it. You can still
use entries in <filename>/etc/shorewall/tcrules</filename>
to force all traffic to one provider or another.<note>
<para>If you don't heed this advice then be prepared
to read <ulink url="FAQ.htm#faq57">FAQ 57</ulink> and
<ulink url="FAQ.htm#faq58">FAQ 58</ulink>.</para>
<para>If you don't heed this advice then please read
and follow the advice in <ulink
url="FAQ.htm#faq57">FAQ 57</ulink> and <ulink
url="FAQ.htm#faq58">FAQ 58</ulink>.</para>
</note></para>
</important>
@ -469,11 +470,15 @@
(Added in Shorewall-perl 4.2.5)</emphasis></term>
<listitem>
<para>Indicates that a balanced default route through the
provider should be added to the default routing table (table
253). The route is added with a weight equal to the
specified <replaceable>weight</replaceable> (default 1). The
option is ignored with a warning message if
<para>Indicates that a default route through the provider
should be added to the default routing table (table 253). If
a <replaceable>weight</replaceable> is given, a balanced
route is added with the weight of this provider equal to the
specified <replaceable>weight</replaceable>. If the option
is given without a <replaceable>weight</replaceable>, an
separate default route is added through the provider's
gateway; the route has a metric equal to the provider's
NUMBER. The option is ignored with a warning message if
USE_DEFAULT_RT=Yes in
<filename>shorewall.conf</filename>.</para>
</listitem>
@ -1324,7 +1329,7 @@ wlan0 192.168.0.0/24</programlisting><note>
</listitem>
<listitem>
<para>Connections initiated by the server and connection requested by
<para>Connections initiated by the server and connections requested by
clients on the firewall that have bound their local socket to one of
the DSL IP addresses. Two entries in
<filename>/etc/shorewall/route_rules</filename> take care of that
@ -1335,18 +1340,22 @@ wlan0 192.168.0.0/24</programlisting><note>
<para>As a consequence, I have disabled all route filtering on the
firewall and do not use the <emphasis role="bold">balance</emphasis>
option in <filename>/etc/shorewall/providers</filename>. The default route
in the main table is established by DHCP. By specifying the
<emphasis>default_rt</emphasis> option on Avvanta, I ensure that there is
a default route when Comcast is down.</para>
in the main table is established by DHCP. By specifying the <emphasis
role="bold">fallback</emphasis> option on Avvanta, I ensure that there is
still a default route if Comcast is down.</para>
<para><filename>/etc/sysctl.conf</filename>:</para>
<programlisting>net.ipv4.conf.all.rp_filter = 0</programlisting>
<para><filename>/etc/shorewall/shorewall.conf</filename>:</para>
<programlisting>ROUTE_FILTER=No</programlisting>
<para><filename>/etc/shorewall/providers</filename>:</para>
<programlisting>#NAME NUMBER MARK DUPLICATE INTERFACE GATEWAY OPTIONS COPY
Avvanta 1 0x100 main eth0 206.124.146.254 track,loose,default_rt eth2,eth4,tun*
Avvanta 1 0x100 main eth0 206.124.146.254 track,loose,fallback eth2,eth4,tun*
Comcast 2 0x200 main eth3 detect track eth2,eth4,tun*
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE</programlisting>
@ -1355,11 +1364,14 @@ Comcast 2 0x200 main eth3 detect track
traffic from Avvanta-assigned IP addresses is sent via the Avvanta
provider. Note that because the Comcast line has a dynamic IP address, I
am not able to use USE_DEFAULT_RT=Yes in
<filename>/etc/shorewall/shorewall.conf</filename>.</para>
<filename>/etc/shorewall/shorewall.conf</filename>. The 'tun*' included in
the COPY column is there because I run a routed OpenVPN server on the
firewall.</para>
<para><filename>/etc/shorewall/route_rules</filename>:</para>
<programlisting>#SOURCE DEST PROVIDER PRIORITY
- 162.20.0.0.24 main 1000 # Addresses assigned by routed OpenVPN server
206.124.146.176/30 - Avvanta 26000
206.124.146.180 - Avvanta 26000
- 216.168.3.44 Avvanta 26000 # Avvanta NNTP Server -- verifies source IP address
@ -1379,6 +1391,7 @@ Comcast 2 0x200 main eth3 detect track
<programlisting>Routing Rules
0: from all lookup local
1000: from all to 172.20.0.0/24 lookup main
10000: from all fwmark 0x100 lookup Avvanta
10001: from all fwmark 0x200 lookup Comcast
20256: from 71.227.156.229 lookup Comcast
@ -1462,7 +1475,8 @@ eth0 !206.124.146.0/24 206.124.146.179
<para>All traffic leaving eth3 must use the dynamic IP address assigned to
that interface as the SOURCE address. All traffic leaving eth0 that does
not have an address falling within the Avvanta subnet (206.124.146.0/24)
must have its SOURCE address changed to 206.124.146.179.</para>
not have a SOURCE address falling within the Avvanta subnet
(206.124.146.0/24) must have its SOURCE address changed to
206.124.146.179.</para>
</section>
</article>