how i can block yahoo messenger in a small office network

dear sir
how i can block yahoo messenger in a small office network i have small office but i donot have server and i want to bock yahoo messenger in all computer in network
how i can do that
can i block all messenger
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Hi nasemabdulla,

block the ports that yahoo uses

Do you have a router?  If so you can block these ports on the router to disbale Yahoo:

If not you should be able to filter these ports in the TCP/IP properties of the network connection. Like this:

Also there are several 3rd party tools which can block this (not free):

Hope this helps.

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nasemabdullaAuthor Commented:
dear gidds99
can i use it in windows xp SP2 and how

thanks for your help
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Can you use what in XP SP2?  I offered 3 different solutions to your problem.
Try ussing ipsec also.
The best is to use block the ports on the router as suggested by gidds99

gidds99>> I think he meant firewall of windows Xp service pack 2.


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