How To allow access to AIM, Yahoo, Gtalk and MSN Messenger through Squid Proxy ?
To proxy and to allow AIM, MSN, Yahoo and GTalk Instant Messenger traffic via with Squid, change/add the following line in the Squid configuration file
# Allow AIM protocols
acl AIM_ports port 5190 9898 6667
acl AIM_domains dstdomain .oscar.aol.com .blue.aol.com .freenode.net
acl AIM_domains dstdomain .messaging.aol.com .aim.com
acl AIM_hosts dstdomain login.oscar.aol.com login.glogin.messaging.aol.com toc.oscar.aol.com irc.freenode.net
acl AIM_nets dst 64.12.0.0/255.255.0.0
acl AIM_methods method CONNECT
http_access allow AIM_methods AIM_ports AIM_nets
http_access allow AIM_methods AIM_ports AIM_hosts
http_access allow AIM_methods AIM_ports AIM_domains
# Allow Yahoo Messenger
acl YIM_ports port 5050
acl YIM_domains dstdomain .yahoo.com .yahoo.co.jp
acl YIM_hosts dstdomain scs.msg.yahoo.com cs.yahoo.co.jp
acl YIM_methods method CONNECT
http_access allow YIM_methods YIM_ports YIM_hosts
http_access allow YIM_methods YIM_ports YIM_domains
# Allow GTalk
acl GTALK_ports port 5222 5050
acl GTALK_domains dstdomain .google.com
acl GTALK_hosts dstdomain talk.google.com
acl GTALK_methods method CONNECT
http_access allow GTALK_methods GTALK_ports GTALK_hosts
http_access allow GTALK_methods GTALK_ports GTALK_domains
# Allow MSN
acl MSN_ports port 1863 443 1503
acl MSN_domains dstdomain .microsoft.com .hotmail.com .live.com .msft.net .msn.com .passport.com
acl MSN_hosts dstdomain messenger.hotmail.com
acl MSN_nets dst 207.46.111.0/255.255.255.0
acl MSN_methods method CONNECT
http_access allow MSN_methods MSN_ports MSN_hosts