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RE: Blocking IM

Subject: RE: Blocking IM
Date: Thu, 8 Dec 2005 16:39:08 -0500
IM use.

-----Original Message-----
From: Christophe Lucas [mailto:clucas@rotomalug.org] 
Sent: Thursday, December 08, 2005 3:21 PM
To: Amiryar, Edris (Seta); firewalls@securityfocus.com
Subject: Re: Blocking IM


Amiryar, Edris (Seta) (Edris_Amiryar@onr.navy.mil) wrote:
Thank you all for your responses. We are using a MS DNS and with our 
current setup blackholing with DNS isn't quite as simple as it should 
be unfortunately and we can't use host files because of some unique 
setup issues. Regardless we were able to successfully block MSN and 
Yahoo by using etherreal and blocking some class C subnets as well as 
putting in several DNS names into Surf Control. So far these class C 
subnets have had no affect on other Yahoo services such as the main 
page or other core features.

Is IM-use is the real problem or it is the bandwith it uses ?

                        ~Christophe


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