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List:       ipfilter
Subject:    Re: ipnat and port allocation problems
From:       The UnSeen <ian () south-border ! com>
Date:       1997-08-18 23:46:30
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On Mon, 18 Aug 1997, Darren Reed wrote:

> In some mail I received from Sen Nagata, sie wrote
> [...]
> No.  ipnat doesn't interact at all with TCP's list of ports that are in
> use.  Can you tell me what was happening to the packets, tho ?  Like, did
> you do a tcpdump and see packets from the "other" ssh connection only
> with the numbers changed because of NAT ?  Did the packets get dropped
> inside IP Filter ?  If both ssh connections have different ip#,port# pairs
> then it should not interfere...

ssh initiates connections from ports 1023 downward to destination port 22.
That is to say:

sshd server listens on port 22 while the client sends/listens on ports
roughly from 1019-1023.  

For more info I offer the following link:

http://www.cs.hut.fi/ssh/

Enjoy,

					The Unseen
					ian@south-border.com
					http://south-border.com/users/ian

"Why do you have to mess with the fantasy?  We already know about the reality
so don't mess with the fantasy." -- From Weird Science


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