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SSH - Relay?

From: Hal Vaughan <hal(at)thresholddigital.com>
Date: Sat Dec 08 2007 - 11:37:11 EST

There are times when I'm at a client's system and I need to access my home computer to tell it to resend data or do something similar so I've just ssh'ed in to my home computer from outside. My firewall forwards a port to my workstation and there's no need to go into the rest of the security details. Basically, with my current ISP, I can just ssh to my home system. I also have a few computers at client's sites that I may need to reach that are behind firewalls, so I have a system where I can post a connection request to a web page, those computers will see it, and issue a command like this (with the variables replaced, of course):

ssh -l $user -nNT -R $port:localhost:22 $domain >/dev/null 2>&1 &

Then when it creates the reverse ssh tunnel, I can login to that system through the tunnel.

I don't want to go into issues with my current ISP, but I would like to switch to Verizon FiOS for a number of reasons. I'd rather not have to pay the extra for a static IP and the ability to run a web server. I considered it, but then *I* have to maintain that server and it's roughly $50 a month more than what I'd be paying for home service. My current hosting company (Westhost) charges me something like $10-$12 a month. While it'd be nice to host my sites here in terms of some conveniences, the price and security hassle outdoes the benefit.

The one issue with Verizon is that I see in their ToS that I can't run any kind of server on my account and I know they block at least port 80. I don't plan to use port 80, but if I lost the ability to ssh into my home computer, it'd hurt in terms of extra on-sight trips.

Is there some way to have two systems use ssh and "meet" in the middle, at a relay site, then form a direct connection? I could use my hosting site as a relay, but sometimes ssh connections have a latency issue, so once I made a connection, I'd want to find a way to create a direct connection.

If that can't be done, I'm open to other suggestions.

Thanks!

Do you need help?

Hal

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Received on Sat Dec 8 11:38:47 2007

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