[TriLUG] Stump the Chumps! ssh tunneling

bp bpevans at bellsouth.net
Thu Jun 5 18:07:24 EDT 2003


Sure.  Setup or find an HTTP server that will do redirects/proxy.  Do 
the ssh connection & redirect to that server and you can browse what 
ever you need from that server.  I used to do just this from home into 
cisco & from other sites through my home server.  It's been a long time 
though & i forget the details fo setting it up...

-bp


Tarus Balog wrote:

> Gang:
>
> Okay, time for Stump the Chumps.
>
> Disclaimer: the following scenario discusses trying to get around a 
> network access roadblock. This was done on a network I had full 
> permission to use (I was in a bank right next to the AS/400 with all 
> the money) so it in no way is requesting help for an illegal activity.
>
> I was at a customer site installing Linux on what used to be Novell 
> server. The network manager was on vacation, so I was pretty much left 
> with a page of instructions and someone who could point out the 
> machine in a lineup.
>
> I installed the O/S and then went to use apt-for-rpm from 
> freshrpms.net. Unfortunately, HTTP on port 80 was set up to be 
> redirected to a Novell Border Manager box, who's client promptly wet 
> the bed with Mozilla.
>
> Now, ftp, ssh and other protocols were open, so I was able to get out 
> on the internet. For example, if I wanted to see the main CNN page I 
> could run:
>
> ssh -L 80:cnn.com:80 sortova.com
>
> and then point the browser to "localhost" and it worked.
>
> However, apt for rpm accessed the freshrpms.net site which used a 
> redirect (not the right term - more like an alias - but you get the 
> meaning). Since this redirect was seen by the browser as a move from 
> "localhost" to another site, it would attempt to access port 80 on 
> that site and promptly be caught by the Border Manager.
>
> Quiz time: using the tools at hand, is there a way to tunnel *all* 
> http traffic through the ssh tunnel?
>
> -T
>
>
>
> ----------
> Tarus Balog
> Consultant
> Sortova Consulting Group, Inc. (www.sortova.com)
> tarus at sortova.com - 919-696-7625
>
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