Comments on: Setting up a permanent ssh tunnel on Mac OS X

By: StarQuake

StarQuake — Wed, 27 Jul 2011 07:02:46 +0000

This is what I came up with after reading your post.
I run this on the server:
#!/bin/bash
while [ 1 ]; do
ssh -R 24800:127.0.0.1:24800 user@clienthost “synergyc -f –name clienthost 127.0.0.1″
sleep 5
done

Advantages for me are:
* Only one script
* I can start it only when needed, on the machine that has the keyboard and mouse
* The client never tries to connect when on another network

By: Aurimas

Aurimas — Tue, 03 Aug 2010 07:31:32 +0000

I see there’s one more project doing the thing:

http://code.google.com/p/cocoa-sshtunnel/

By: Justin

Justin — Thu, 19 Jun 2008 17:33:37 +0000

I’ve developed a Mac application called Meerkat which helps manage tunnels and keep them up over sleep/wake, network changes, etc. It might be handier than building scripts for each tunnel that you need. I had started scripting lots of things like you did initially, but after a while, it got unmanageable.

http://codesorcery.net/meerkat

By: G.J. van de Streek

G.J. van de Streek — Mon, 17 Mar 2008 13:28:03 +0000

@thai: did you change the script in any way? You might see this when using the -f option.

By: thai

thai — Wed, 05 Mar 2008 07:48:33 +0000

Great tutorial! Exactly what I was looking for.

Question: is it normal for the tunnel-start.sh script to continually try to tunnel through?

ps-efl|grep ssh shows multiple ssh tunnel attempts.

If I run the login-hook.sh script manually (instead of the loginhook way), I can see errors about trying to use 10548 (my local side port to AFP) again.

Thanks again for posting this how-to.

By: Aurimas

Aurimas — Wed, 27 Feb 2008 20:52:45 +0000

Ah, so did not find some tool ready for that out of the box? Regarding ServerAliveInterval – makes sense, I’ll have to add that as well.

By: andreas

andreas — Wed, 27 Feb 2008 20:34:55 +0000

Now I even tried it. It works well, but especially after I added

-o ServerAliveInterval=3

to the ssh command. Without this the ssh process would hang after a sleep in some cases. Now the process is terminated when the connection is lost.

Cheers

By: andreas

andreas — Sun, 17 Feb 2008 09:50:30 +0000

Thanks!

I was searching high and low for some application that would do this, but your script is a simple solution that looks very effective.

I am currently using ssh keychain, but after sleep it can’t handle reestablishing the tunnel.

Must not forget my unix skills

Cheers