This is really related to iptables, not I presume Fedora-specific. But I'm really hoping that somebody here will be able to school me on iptables, so I don't have to find and subscribe to some other list just to ask one question.
I'm faced with the problem of needing to punch a hole in a firewall on our portal server so that, in our case, ssh to port 20022 on external interface of that server actually just connects to port 22 on another machine located in the network on the internal interface. I hope I'm being clear.
I've tried many iterations of iptables rules to accomplish this. The closest I've come is: