Hi all, I found the error. acl QUERY urlpath_regex cgi-bin \? acl NoCacheDomains dstdomain .checkpoint.com acl local-servers src 172.20.0.0/16 192.168.100.0/24 no_cache deny QUERY no_cache deny NoCacheDomains no_cache deny local-servers This should not be in your configurationfile if your own network is 172.20.0.0/16 and 192.168.100.0/24. Because the ACL looks to the source IP's it will never cache requests coming from those ranges and therefore it cannot cache anything. I also noticed I had pasted the wrong configfile in my first mail so you guys couldn't have found the cause of my problem... so lesson learned: always paste the config you are using. *doh* One question though: what does TCP_IMS_HIT mean? What is "IMS"? Kind regards, Jeroen.