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Enhance FAQ 89 -- DSL modem access

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This commit is contained in:
Tom Eastep 2010-05-30 09:30:56 -07:00
parent 97d8fd1588
commit 07366ac819
1 changed files with 48 additions and 3 deletions
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docs/FAQ.xml
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@ -2710,6 +2710,8 @@ Shorewall has detected the following iptables/netfilter capabilities:
LOG Target: Available
Persistent SNAT: Available
gateway:~# </programlisting>
<para></para>
</section>
<section id="faq19">
@ -2748,14 +2750,16 @@ loc $FW ACCEPT </programlisting>
<itemizedlist>
<listitem>
<para>My local network is 172.20.1.0/24 so I set the IP address in
<para>My local network is 172.20.1.0/24, so I set the IP address in
the modem to 172.20.1.2.</para>
</listitem>
<listitem>
<para>The IP address of my firewall's interface to the LAN is
172.20.1.254. I added the following two configuration
entries:</para>
172.20.1.254. The logical name of the DSL interface is EXT_IF and my
LAN interface is INT_IF.</para>
<para>I added the following two configuration entries:</para>
<para><filename>/etc/shorewall/masq:</filename></para>
@ -2770,6 +2774,47 @@ EXT_IF:172.20.1.2 0.0.0.0/0 172.20.1.254
<programlisting>#ADDRESS INTERFACE EXTERNAL HAVEROUTE PERSISTENT
172.20.1.2 EXT_IF INT_IF no yes
</programlisting>
</listitem>
</itemizedlist>
<para>If you can't change the IP address of your modem and its current
address isn't in your local network, then you need to change this
slightly; assuming that the modem IP address is 192.168.1.1:</para>
<itemizedlist>
<listitem>
<para>Do not include an entry in
<filename>/etc/shorewall/proxyarp</filename>.</para>
</listitem>
<listitem>
<para>Add an IP address in 192.168.1.0/24 to your external interface
using your configuration's network management tools. For
Debian-based systems, that means adding this to the interface's
stanza in <filename>/etc/network/interfaces</filename>:</para>
<programlisting> post-up /sbin/ip addr add 192.168.1.254/24 dev <replaceable>external-interface</replaceable></programlisting>
</listitem>
<listitem>
<para>Add a host route to 192.168.1.1 out of your external interface
using your configuration's network management tools. On Debian-based
systems, that means adding this to the interfaces's stanza in
<filename>/etc/network/interfaces</filename>:</para>
<programlisting> post-up /sbin/ip route add 192.168.1.1/32 dev <replaceable>external-interface</replaceable> src 192.168.1.254</programlisting>
</listitem>
<listitem>
<para>Your entry in <filename>/etc/shorewall/masq</filename> would
then be:</para>
<programlisting>#INTERFACE SOURCE ADDRESS
COMMENT DSL Modem
EXT_IF:192.168.1.1 0.0.0.0/0 192.168.1.254
</programlisting>
</listitem>
</itemizedlist>