AOL Instant Messenger (AIM)
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Details
AIM natively uses TCP port 5190 and bypasses the Squid proxy. When configured to use an explicit proxy, it will use CONNECT tunneling to go through squid.
Squid Configuration File
# Permit AOL Instant Messenger to connect to the OSCAR service acl AIM_ports port 5190 443 acl AIM_domains dstdomain .oscar.aol.com .blue.aol.com acl AIM_domains dstdomain .messaging.aol.com .aim.com acl AIM_nets dst 64.12.0.0/16 205.188.0.0/16 http_access allow CONNECT AIM_ports AIM_nets http_access allow CONNECT AIM_ports AIM_domains