Re: how to block web messenger services

[Mathew Rowley <mathew.rowley () gmail com>]

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 () vediorps com> 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 () securityfocus com [mailto:listbounce () securityfocus com] On
> Behalf Of Dixon, Wayne
> Sent: Friday, March 23, 2007 5:39 PM
> To: nawalmiftahi () gmail com; security-basics () securityfocus com
> 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 () securityfocus com [mailto:listbounce () securityfocus com]
> On Behalf Of nawalmiftahi () gmail com
> Sent: Tuesday, March 20, 2007 6:26 AM
> To: security-basics () securityfocus com
> 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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