Dear Squid-list, i am a bit confused about : http://www.squid-cache.org/Versions/v3/3.0/cfgman/acl.html acl aclname srcdomain .foo.com ... # reverse lookup, from client IP The name "none" is used if the reverse lookup fails. What I want to achieve is to deny access to clients which have no DNS entry. My ACL actually looks like this : acl BadClients srcdomain none deny_info ERR_CUSTOM_ACCESS_DENIED BadClients http_access deny BadClients But it doesn't work properly. The message which is defined in ERR_CUSTOM_ACCESS_DENIED appears but once the refresh button (or CTRL-R) in the browser (IE & Firefox) is pressed access is granted. What am I doing wrong here ? / regards, Jan