Thanks, TOM for this co-operation, i hope it would work, becuase my i was configuring wrong,,,,but at the time i have to off(work), really appericiate you and your wife's work in the field of networking[security], specially the 3rd chapter of configuring ISA 2000(syngress) really impressed everyone.... Regards, Faraz Thomas W Shinder <tshinder@xxxxxxxxxxx> wrote: Header Content-Type: Signature application/x-msnmsgrp2p Request header. and Response header Thomas W Shinder, M.D. Site: www.isaserver.org Blog: http://blogs.isaserver.org/shinder/ Book: http://tinyurl.com/3xqb7 MVP -- ISA Firewalls --------------------------------- From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Faraz Hassan Khan Sent: Wednesday, March 22, 2006 9:41 AM To: isalist@xxxxxxxxxxxxx Subject: [isalist] Re: For Blocking MSN Messenger File Transfers, TOM Said; Well may be(I Think NOT)... But when you defined those signatures, what was your search criteria while adding new signature? Search in : ? HTTP header : ? Signature : ? Thomas W Shinder <tshinder@xxxxxxxxxxx> wrote: Maybe things have changed. Do a packet trace to see what headers are being used now. Thomas W Shinder, M.D. Site: www.isaserver.org Blog: http://blogs.isaserver.org/shinder/ Book: http://tinyurl.com/3xqb7 MVP -- ISA Firewalls --------------------------------- From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Faraz Hassan Khan Sent: Wednesday, March 22, 2006 9:27 AM To: isalist@xxxxxxxxxxxxx Subject: [isalist] For Blocking MSN Messenger File Transfers, TOM Said; Hi EveryOne For Blocking MSN Messenger File Transfers, TOM Said; All you need to do is configure the HTTP Security Filter with a signature to block the following Host Header: /x-msnmsgrp2p Now i have Access Rule(Allows Internal to external Only HTTP & HTTPS), while adding a new signature, what should be the signature search criteria? 1. Search in : Request headers HTTP header : /x-msnmsgrp2p Signature : MSN Messenger 2.Search in : Request URL Signature : /x-msnmsgrp2p 3. Search in : Request headers HTTP header : /x-msnmsgrp2p Signature : /x-msnmsgrp2p I have checked all these combinations of signature search criterias, but NOT WORKING! --------------------------------- Yahoo! Travel Find great deals to the top 10 hottest destinations! --------------------------------- Yahoo! Mail Use Photomail to share photos without annoying attachments. --------------------------------- Yahoo! Mail Use Photomail to share photos without annoying attachments.