I've googled and done some searches, and the only information I can find is for port forwarding with NAT. Perhaps that's what I need to accomplish what I am trying to do. If I missed an obvious link or source with this information, I apologize and please slap me. I currently have an SMTP server listening on port 25, and the machine has its own static IP address, no NAT is being used. I want to use iptables to forward inbound traffic on port 587 to port 25 of that same machine, so basically making SMTP listen on both ports. I do not wish to configure the SMTP software to listen on multiple ports, since I may want to open up several more ports in the future and that would be a lot of idle daemons listening on ports they may or may not use. So, my questions is: how can I have incoming traffic on port 587 go to port 25 of the localhost? Thanks, Kristofer - To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
