On 2007/01/28 13:03, Soner Tari wrote: > I'm running Postfix on OpenBSD and have multiple external links on the > same box. I want outgoing smtp connections to be routed to ext_if2, but > the rest to ext_if1. To achieve this, default route being ext_if1, I > tried a couple of things: > > pass out log quick route-to ($ext_if2 $ext_gw2) \ > proto tcp to any port smtp user _postfix keep state
if that's all you have, run tcpdump on $ext_if2 and you'll see packets going out with $ext_if1's source address because you're missing the nat rule to go with it. route-to/reply-to just change the routing, not the src/dest addresses. > In short, I need something like destination-port-based routing for > multiple links. The situation is not specific to smtp port or Postfix, > I'd like to achieve the same for any port I wish. works perfectly.
