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Learn tips for controlling mobile technology and devices in your organization amid the chaos, with expert videos on mobile security and related resources from BlackBerry.
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I am not that familiar with ISA server but it is basic firewall rules. Create a rule to block all Yahoo messenger ports except to the specific IP you want to let through. Make sure you assign a static IP to the computer you want to have messenger access. This was first published in September 2002
Network Management Strategies for the CIO
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