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<h1 id="main-title">A/UX: How To Turn On IP Forwarding (8/94)</h1>
<div id="abstract">
 
<div id="intro-container"><div class="truncate"><div class="attr SYMPTOMS"><div class="attr TOPIC"><FONT SIZE=4><BR>
I just discovered that A/UX defaults IP forwarding to OFF.  This means that an A/UX system with more than one interface no longer &quot;knows&quot; how to route IP traffic regardless of how in.routed is configured.<BR>
<BR>
</FONT></div></div> <!--  attr Symptom  --></div> <!--  truncate --></div> <!--  intro-container --><div class="clear"> </div>
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To enable forwarding, run adb on the kernel.  Log in and type the following command:<BR>
<BR>
# adb -w -k /unix /dev/kmem<BR>
<BR>
a.out file = /unix (COFF format)<BR>
core file = /dev/kmem<BR>
ready<BR>
<BR>
ipforwarding?D<BR>
<BR>
ipforwarding:    0<BR>
<BR>
ipforwarding?W 1<BR>
<BR>
ipforwarding:    0x0                 =         0x1<BR>
<BR>
$w<BR>
$q<BR>
#<BR>
<BR>
This changes the &quot;ipforwarding&quot; constant in the kernel.  Reboot, and when<BR>
the system comes back up, IP forwarding will be on.<BR>
<BR>
For more details on IP forwarding refer to the A/UX Network System Administration manual section on &quot;Configuring and Managing a TCP/IP Network&quot;.<BR>
<BR>
<BR>
Article Change History:<BR>
24 Aug 1994 - Reviewed and updated.<BR>
<BR>
Support Information Services<BR>
<BR></div>
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<div class="mod-date">Published Date: Feb 20, 2012</div>
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