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Date:      Sun, 08 Sep 2002 09:44:20 +0200
From:      Michael Bretterklieber <mbretter@inode.at>
To:        freebsd-net@freebsd.org
Subject:   protocol inspection (tunneling ssh over http proxy)
Message-ID:  <3D7AFFD4.6020500@inode.at>

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Hi,

Is there any project or are there any plans to extend ipfw with a 
protocol inspection module?

I know that this can be very bad for the performance of a firewall, but 
If you have only a bandwidth of 1MBit this shouldn't be a problem.

We have problems in our company, that some users, wich have not directly 
access to the internet, let ssh tunnel over our http-proxy. Extending 
ssh for tunneling is very easy (see Putty or corkscrew) and its also not 
a problem for them to let on another machine sshd run on port 443 or 80.

At the moment I have no idea how to prevent the users from tunneling ssh 
over http.

bye,
-- 
--
--------------------------------------
E-mail: Michael.Bretterklieber@jawa.at
----------------------------
JAWA Management Software GmbH
Liebenauer Hauptstr. 200
A-8041 GRAZ
Tel: ++43-(0)316-403274-12
Fax: ++43-(0)316-403274-10
GSM: ++43-(0)676-93 96 698
homepage: http://www.jawa.at
--------- privat -----------
E-mail:   mbretter@inode.at
homepage: http://www.inode.at/mbretter
--------------------------------------



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