RE: Reverse SSH tunelling

From: Tay, Gary (
Date: 08/31/04

Date: Tue, 31 Aug 2004 18:13:29 +0800
To: "L0stm4n" <>, "Raistlin Majere" <>


-----Original Message-----
From: L0stm4n []
Sent: Saturday, August 28, 2004 4:35 AM
To: Raistlin Majere
Subject: Re: Reverse SSH tunelling

Check out this URL:

you could probably combine that with key auth instead of passwords.

And instead of having them always trying to ssh in, you could setup a
file on a webserver and have them parse the file. if they see their
hostname in the file it means they should "call home". just have em
check that file every 5 minutes or so.

On Wed, 25 Aug 2004 22:50:54 -0400, Raistlin Majere
<> wrote:
> Hi All,
> I need some advice .. I have a situation where about fifty
> servers will be located in fifty sites that cannot allow services to
> be hosted. These servers will be in private network space behind
> firewalls. I can use them to 'scp' files out to a common home base
> server, but sometimes I need to access a command line console on these

> servers. I am thinking of having a hourly cron job ssh out to my home
> base server and leaving that tunnel open so that I can access that
> console, but am looking for the specific way of doing this. Security
> os pf the utmost concern, so I need some sort of encrypted tunnel,
> hence the thought of ssh, but I don't know how to do this 'reverse'
> tunnel... I was also thinking of a 'free swan' vpn tunnel ..
> Thanks
> Raist

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