How can I block only Yahoo Messenger with ISA server?

Joel Johnson

How can I block only Yahoo Messenger with ISA server?
Yahoo uses http. You will need to block access to their servers. Here is the current list from yahoo:

Protocol: TCP or HTTP

Servers:
scs.msg.yahoo.com
scsa.msg.yahoo.com
scsb.msg.yahoo.com
scsc.msg.yahoo.com

Port: 20,23,25,80,119,5050,8001,8002

This was last published in July 2003

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Cisco collaboration revenue takes hit to start 2020

The 4 features of a complete enterprise video platform

External collaboration in Webex Teams limited by new security control

SearchMobileComputing

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What Android security threats should IT know about?

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Key components for negotiating an HPC colocation contract

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Step 2: The "block the nexus" approach: IM

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