Prevent Yahoo messenger connections with Squid
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Public domain
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### /usr/local/squid/etc/squid.conf

    # Yahoo! Messenger
    acl ym dstdomain .messenger.yahoo.com .psq.yahoo.com
    acl ym dstdomain .us.il.yimg.com .msg.yahoo.com .pager.yahoo.com
    acl ym dstdomain .rareedge.com .ytunnelpro.com .chat.yahoo.com
    acl ym dstdomain .voice.yahoo.com

    acl ymregex url_regex yupdater.yim ymsgr myspaceim

    # Other protocols Yahoo!Messenger uses ??
    acl ym dstdomain .skype.com .imvu.com

    http_access deny ym
    http_access deny ymregex

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_BY: Pejman Moghadam_  
_TAG: squid, yahoo_  
_DATE: 2011-03-04 22:33:12_