Hi all,
 
To block Yahoo chat and Napster.com, I did nslookup and got IP addresses and I am planning to block  these set of IP addresses on the Firewall.
 
Is it the right way to get the respective server IP addreses and block this service or is there any port number I can block on Firewall.
 
Thanks
 
regs
 
sathish m r
 

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