[ale] Redirect a port

[Christopher Fowler]

I have a service that runs on port 5000 on a server.  I have devices in
the field that are configured for 5000 or 5001.  Is it possible to use
iptables to redirect requests coming into 5001 to 5000?  I've done this
with DNAT but the server that is running the software is not behind a
NAT.  It is on a public IP.  So I want to do something like this:


0.0.0.0/0 -> 209.168.X.X:5001 -> 5000