On Tue, 2007-02-13 at 22:54 +0100, Paul Viney wrote:
> I still seem to have much the same problem. I no longer get ICMP unreachable
> errors, but the packet just seems to disappear - I can't see it being
> forwarded on any interface, nor can I find any kind of reply - icmp or
> otherwise.
This is one of my favourites :-)
Usually that problem is caused by the rp_filter feature, which silently
drops packets that arrive on an interface answers wouldn't be routed to.
Just try
for i in /proc/sys/net/ipv4/conf/eth*/rp_filter; do
echo 0 > $i
done
and see if that helps.
(indeed, you don't really need to switch it off for all of them, just
the uplink interfaces would be enough)
Hth,
Torsten
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