Re: how to block web messenger services

Another way to go is creating is using Snort inline. Its pretty easy to sniff the connection traffic and find unique strings to create pretty fast rules. I have done this for other online (AIM Express, GMail chat) chat services.




On Mon, 26 Mar 2007 08:53:20 -0400
"Devin Rambo" <drambo@xxxxxxxxxxxx> wrote:

There are companies that make appliances that can do application layer
filtering and/or QoS. We're playing around with a Packeteer PacketShaper
here, and so far, we're pretty impressed with what it can do. Among the
layer 7 traffic it can regulate are all the common IM services, but there
are a whole bunch of other protocols that you can work with as well - VOIP,
file sharing, etc.

Devin

-----Original Message-----
From: listbounce@xxxxxxxxxxxxxxxxx [mailto:listbounce@xxxxxxxxxxxxxxxxx] On
Behalf Of Dixon, Wayne
Sent: Friday, March 23, 2007 5:39 PM
To: nawalmiftahi@xxxxxxxxx; security-basics@xxxxxxxxxxxxxxxxx
Subject: RE: how to block web messenger services

Short of a proxy to block the specific addresses, I myself, can't think of
anyway, since the web services connect to the back end server of the IM
services; and the only connection from your site to the web service site is
via HTTP, I can't think of any other way.

Wayne




-----Original Message-----
From: listbounce@xxxxxxxxxxxxxxxxx [mailto:listbounce@xxxxxxxxxxxxxxxxx]
On Behalf Of nawalmiftahi@xxxxxxxxx
Sent: Tuesday, March 20, 2007 6:26 AM
To: security-basics@xxxxxxxxxxxxxxxxx
Subject: how to block web messenger services


Hi all ,
i am a security admin,yahoo messenger and other chat services are blocked
on our network, but we can access them thru web(ebuddy) , i wanted to know
how can we make sure that these chat services (yahoo messenger, icq, msn
messeger ) cannot be accessed through web as well , i mean how to block
them. thanks


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