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  Asked: Nov 19 2007   10:11 AM GMT
  Asked by: Aliyani

Isa server rules............


ISA Server, Security management

Hi,
I wrote a roule in isa server 2004 for preventing users ao access to yahoo and msn messanger but it doesn't work!!!!!someones say that the messengers url were changed!!!
I don't know the messengers's ports!!!!??
Could you please tell me what is the best solution for this problem!!!!??
Thank you.
-------
Regards
Mahnaz

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Last Answered: Nov 19 2007  11:23 AM GMT  by Maryam82




I believe Yahoo messenger can be blocked with the port it uses. You can check them out with command 'netstat -n'
If am not mistaken, MSN messenger can't be blocked because it uses the same MSN servers for authentication and port 80. So if you wan to block it, you'll have to block MSN sites (MSN, hotmail)
You can block these therough application signatures. You can check if ISA 2004 provides such utility.
Check websense it is a nice filtering service.
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