Hi, I know, this has been asked many times before but I can´t make it work yet. I read that when using transparent proxy, to block MSN Messenger to a certain IP I should include in squid.conf the following: acl user src 192.168.1.11/255.255.255.255 acl messengerq req_mime_type -i ^application/x-msn-messenger acl messengerp rep_mime_type -i ^application/x-msn-messenger http_access deny user messengerq http_access deny user messengerp But i´ve tried that and still can´t block MSN on the terminal I´m testing. I read also about using url_regex like acl messenger1 url_regex .messenger.hotmail.com acl messenger2 url_regex .msgr.hotmail.com http_access deny user messenger1 http_access deny user messenger2 But can´t block it with that either. Can anyone that has succesfully blocked MSN Messenger, please send me an example on how to do it? Thanks and regards, Edo