Blocking MSN Messenger from ISA 2000 Server – Part I

Yesterday I was trying to block MSN Messenger from ISA 2000 Server in Cached mode.  I have done that before on ISA 2000 Server in Integrated mode using MSNIM.vbs script available from ISA Server Tools Repository – http://isatools.org/ (Thanks Jim for excellent tools site).


When I ran the script, it gives the following message;


Creating (or updating) the FW App Settings
Creating (or updating) the protocol definition
Creating (or updating) the protocol rule
Error 0x80040361; At least one protocol must be specified. – while trying to set ISA up for MSN Messenger


I quickly wrote to ISA Server guru Jim Harrison and he replied – “ISA 2000 can’t block MSN Messenger using MSNIM.vbs script in cache mode”.


In Part -II we will see a cheeky method to block MSN Messenger from ISA 2000 Server.


MORE INFORMATION


Instant Messaging with ISA Server
http://www.microsoft.com/technet/prodtechnol/isa/2000/maintain/isaimsec.mspx


Common Application Signatures
http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/commonapplicationsignatures.mspx


ISA Server Tools Repository
http://isatools.org/


Microsoft ISA Server Firewall and Cache resource site
http://www.isaserver.org/


Scripts for ISA Server
http://www.isascripts.org/


Dr. Tom Shinder’s ISA Firewall Space
http://spaces.msn.com/drisa/


ISA Server Blogs
http://www.microsoft.com/isaserver/community/default.mspx


ISA Server Community (MVP’s)

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