Scorpy wrote:
> Maybe this will help.
> I used tcpdump at the same time on dsl0 and eth0.
> 
> ETH0 (local)
> 22:38:16.155954 IP 192.168.1.180.isakmp >
> cpe-85-10-34-99.static.amis.net.isakmp: isakmp: phase 1 I agg
> 22:38:16.893540 IP cpe-85-10-34-99.static.amis.net.isakmp >
> 192.168.1.180.isakmp: isakmp: phase 1 R agg
> 22:38:16.894071 IP cpe-85-10-34-99.static.amis.net.isakmp >
> BSN-95-229-95.dsl.siol.net.isakmp: isakmp: phase 1 R agg

Okay -- this is interesting. The local router is clearly confused; I
suspect as a result of NAT taking place between the two routers. It is
sending an ISAKMP phase 1 R packet addressed to your firewall and with a
source IP of the remote router (which is what we've been seeing in the
Shorewall message).

So the two routers don't get so far as to negotiate an SA; the local one
sends an unfathomable (to me) packet.

Afraid that you have reached the end of my knowledge here but I suspect
that it is a configuration problem in one or both of the routers. Maybe
someone more familiar with ISAKMP can shed some light.

-Tom
-- 
Tom Eastep    \ Nothing is foolproof to a sufficiently talented fool
Shoreline,     \ http://shorewall.net
Washington USA  \ [EMAIL PROTECTED]
PGP Public Key   \ https://lists.shorewall.net/teastep.pgp.key

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