I have an acl that I use to block ad sites. One of the regex's that I use is: "_ad_". I have discovered that I need to tweak this regex to fail when it finds the following pattern: http://something.com/path/some_ad_test.js I modified my regex as follows: _ad_(?!test) which should work as far as I can tell, however, when I reload squid, I get the following error: squid.conf line 644: acl Deny_ADs url_regex -i "/etc/squid/deny_ADs" aclParseRegexList: Invalid regular expression '_ad_(?!test)': Invalid preceding regular expression In fact, anytime I ever try to use round brackets, I get that error. As a workaround, I used _ad_[^t] which is vague but does allow the pattern to fail the query. Any suggestions out there? Thanks in advance...
