Currently running squid 3.0.STABLE14-20090412, but the issue has been around for months, possibly ever since moving to 3.0STABLE release from 3.0PRE, or maybe squid 3.0 config: url_rewrite_program /usr/local/squid/bin/squidGuard -c /Applications/squid/squidguard.conf url_rewrite_children 8 url_rewrite_concurrency 8 url_rewrite_host_header off cache.log with debug_options 61,5 2009/04/14 19:58:13.313| redirectStart: 'http://doubleclick.net/' 2009/04/14 19:58:13.313| redirectHandleRead: {<NULL>} 2009/04/14 19:58:13.506| redirectStart: 'http://www.doubleclick.com/' 2009/04/14 19:58:13.507| redirectHandleRead: {<NULL>} squidGuard 1.4 is blocking just fine by itself: echo "http://doubleclick.net 1.2.3.4/- user GET -" | squidGuard -c /Applications/squid/squidguard.conf -d 2009-04-14 19:56:04 [942] New setting: logdir: /Applications/squid/logs 2009-04-14 19:56:04 [942] New setting: dbhome: /Applications/squid/db 2009-04-14 19:56:04 [942] init domainlist /Applications/squid/db/squid-local 2009-04-14 19:56:04 [942] loading dbfile /Applications/squid/db/squid-local.db 2009-04-14 19:56:04 [942] init domainlist /Applications/squid/db/squid-domains 2009-04-14 19:56:04 [942] loading dbfile /Applications/squid/db/squid-domains.db 2009-04-14 19:56:04 [942] init urllist /Applications/squid/db/squid-urls 2009-04-14 19:56:04 [942] loading dbfile /Applications/squid/db/squid-urls.db 2009-04-14 19:56:04 [942] init expressionlist /Applications/squid/db/squid-expressions 2009-04-14 19:56:04 [942] squidGuard 1.4 started (1239753364.026) 2009-04-14 19:56:04 [942] squidGuard ready for requests (1239753364.030) 2009-04-14 19:56:04 [942] source not found 2009-04-14 19:56:04 [942] no ACL matching source, using default 2009-04-14 19:56:04 [942] Request(default/block/-) http://doubleclick.net 1.2.3.4/- - GET REDIRECT 302:http://127.0.0.1 1.2.3.4/- user GET 2009-04-14 19:56:04 [942] squidGuard stopped (1239753364.030) Any suggestion of additional troubleshootings with squid will be the most welcome. -- Psssst! Schon vom neuen GMX MultiMessenger gehört? Der kann`s mit allen: http://www.gmx.net/de/go/multimessenger01