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Hi Scott,

Thank you for the clarification. My confusion comes from thinking that the packets would need to be separated, either by adifferent IP address, port, or both. If an sftp session is initiated on the i to the remote location, on the default port, how is an additional session created, on the default port, when the IP addresses on both ends are the same, and yet the packets get routed to the appropriate connection? I thought the connection was the port. If I understand the process correctly, in addition to ip address and port, there is also a connection number?

John McKee


-----Original message-----
From: Scott Klement midrange-l@xxxxxxxxxxxxxxxx
Date: Wed, 25 Nov 2009 16:46:21 -0600
To: Midrange Systems Technical Discussion midrange-l@xxxxxxxxxxxx
Subject: Re: LPR over SSH

Hi John,

I don't see why it matters whether you are using sftp to the same location?!

The SFTP and SSH Tunnel aren't going to get mixed together if that's
what you're worried about. They're running in separate TCP connections,
after all...

Just as you're able to have multiple 5250 sessions to your telnet server
without the data getting mixed together, you're also able to have
multiple SSH sessions to a single SSH server without the connections
getting mixed together. This really is a non-issue.


jmmckee wrote:
Hi Scott,

I started with the concept from Linux of LPR over SSH. That was not
what I wanted. I wanted a secure print solution. Which this >might<
be. I hesitate since I also use sftp to the same location. If a
different port is not used, how would the remote system separate sftp
and this secure print session? That was why I thought that a new
port between the local and remote system could be used.

I apologize for making this as confusing as it has become. When I
proposed this to my contact at the remote site, I was told that the
company that provides sftp for them was confused. Lots of hops and
hoops to go through, for something that seems rather simple.

John McKee

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