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Re: [suse-security] IP Tunnel in only one direction possible



Also, make sure forwarding is turned on for that interface.

On Wed, 2003-04-23 at 13:02, Thomas Kerkau wrote:
> Hi Peter,
> 
> 
> > |NET2 pings NET1: GW2(eth0) logs an icmp request ?
> > on eth0:
> >   9 7.631138    192.168.101.239       192.168.100.205       ICMP     Echo
> > (ping) request
> 
> the paket is entering GW2.
> 
> > 
> > 192.168.101.0/24 ist net2 internal
> > 192.168.100.0/24 ist net1 internal
> > 
> > on ipsec0:
> >       3  1.694921    217.235.199.35        192.168.100.205       ICMP
> > Echo (ping) request
> 
> the paket is leaving ipsec0
> 
> > 
> > on eth1:
> > nothing--
> > 
> > on ppp0
> > nothing--
> 
> but not forwarded to ppp0/eth1. Just checked this on a 7.3, you will see
> ESP-pakets on both. hopfully this was not changed. Is ipsec0 bound to
> eth1/ppp0 (interfaces directive in ipsec.conf)? 
> 
> > Yes I forgot to paste int the reply. :)
> > but basically ipsec0 looks differnent on both machines
> > 
> > GW2:|> 10:21:04.305584 192.168.101.239 > 192.168.100.1: icmp: echo
> > GW1:|> 08:51:05.057368 unknown ip 0
> 
> Are you shure that these entries are correlated? Do you see ESP-pakets
> on the external interface of GW1?
> 
> My feeling at this point is that GW2 doesn't send any paket to GW1.
> Check if "ipsec eroute" and "ipsec auto --status" shows the correct
> connections, and check "route".
> 
> Greetings, Thomas
> 
> 
> --
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