From owner-freebsd-security  Tue May 28 04:46:01 1996
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Date: Tue, 28 May 1996 06:50:32 -0500
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From: Alex Nash <alex@orion.fa.tdktca.com>
To: team_fbf@pristine.com.tw
Cc: freebsd-security@FreeBSD.org
Subject: RE: /kernel: attempted source route from xxx.xxx.xxx.xxx
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> Our FreeBSD system reports 
> 
> May 28 17:19:51 <hostname> /kernel: attempted source route from xxx.xxx.xxx.xxx to 192.72.150.2

IP input processing drops source route packets by default (note that
this differs from the original Net/3 code).  If you want to allow
source route packets, type:

   # sysctl -w net.inet.ip.sourceroute=1

Alex