Local binding port for SSH client?

[Bill Davidsen]

Jorge Fábregas wrote:
> On Tuesday 02 September 2008 05:00:32 pm Kevin J. Cummings wrote:
>> Are you looking for a way to control which outgoing port ssh uses?
> 
> Yes, this is what I want.  For example, on a remote ACL you may have your 
> filters based on:
> 
> - destination ip
> - destination port
> - source ip
> 
> I was thinking I could add "source port" to that list..but then , on the 
> client side, I'd have to specify local binding port.
> 
> Irrespectively of its security merits I'm just curious if it's possible at all 
> (with ssh or any other net tool).
> 
If you want to learn a little about iptables you can just do SNAT to 
control the IP and port.
   iptables -A POSTROUTING -t nat -p tcp -d 1.2.3.4 --dport ssh \
   -j SNAT --to-source 4.3.2.1:24702

That is, if the destination IP is 1.2.3.4 and the destination port is 
ssh (22), change the source IP to 4.3.2.1 port 24702

Requires static IP.

-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot