On Sat, 2005-05-28 at 10:57 +0200, Meni Shapiro wrote: > Hi, > > You failed to mention what SMTP server you are running. Sorry, I didn't think that would make a difference. The SMTP issue is a side effect of the routing problem. The machine responds to all connections from foreign networks via the default gateway, instead of the interface that the connection was made two. It's postfix by the way :-)
The setup looks like this. eth0 is local network, 192.168.1.1 is the default gateway (IP-COP firewall). eth1 is connected to a router, which is connected to a least line. For argument's sake, lets say eth1 is 203.203.203.21 (and the router is .20). eth1 is a publicly routeable IP. It used to be the only internet connection, but the leased line is going to be axed soon. This machine used to be the firewall for the network too, doing NAT with iptables, nothing fancy, as well as being the mail gateway for an exchange server in the network. Now it's just running postfix. So what happens is a connection comes in on eth1 from somewhere on the internet, and the box tries to reply via the default gateway, which is connected to a different ISP. I found this: http://linux-ip.net/html/adv-multi-internet.html which seems to be the answer to my problem, will try it out tomorrow when I have access to the building. Thanks -- Hans du Plooy SagacIT (Pty) Ltd hansdp at sagacit dot com -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
