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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 /etc/pf.conf file:

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?

Update

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.

freedev
  • 323

2 Answers2

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rdr pass on $internal_ip inet proto tcp from any to any port 22

Not an expert by any means, think that should do it. Been a long time since I used anything other than iptables :)

Jake
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You can try to find a port of rinetd for Mac OS X.

Mike
  • 598