how do i block a client from accessing yahoo chat My current set ups is as follows -- have a firewall and behind it have a proxy server running on port 3128.
now to block yahoo chat access i did the following in my squid.conf
acl special_url url_regex -i chat.yahoo.com|messenger.yahoo.com http_access deny special_url
but this still allows clients to log to yahoo chat .
Do i need to block certain ports , and if so which ones
Thank you !!