I need to forward all connection to any address port 22 to a different gateway (i.e. no default). Firstly I suppose to do it with ipfw:
sudo ipfw add 5 fwd $EXTERNAL_IP,22 tcp from any to any 22 keep-state
But with Mac OS X Lion it seems do not work. Anyway, looking at ipfw documentation I see it is deprecated and I should use pfctl.
So I have modified
rdr proto tcp from $internal_ip to any port 22 -> $external_ip port 22
But with no luck.
Does anyone know how to translate or forward all connections generated by local applications to any address but port 22 to a different gateway/ip address?
Following Jake's suggestion I tried to specify only destination IP, so I converted rdr rule to mac os x syntax:
rdr proto tcp from any to any port 22 -> $external_ip port 22
Even in this case I didn't get results I expected, i.e. I can connect via ssh to my server but through default gateway.