Here is what I'm looking to do (And please tell me if I'm crazy as I've been beating my head on this for a week) I'm looking to take a packet that is incoming on my machine, on port 21 and redirect it to port 3805 on a completely different external machine. Basically, I'm trying to solve how to make the machine a transparent proxy on the same external interface. The packets coming in on port 21 can be coming from anywhere on the internet, and will be sent to port 3805 on the remote machine, which then should come back through my box and back to the clients. Any ideas on using iptables for this? I dusted off redir and while it worked it had its occasional issues so I'm trying to bring a better hammer to beat on the nail.
