Hi Amos, Thank you for your reply. This is required because when a video is hosted in windows media server and fetched from client using windows media player it uses Windows media HTTP streaming protocol for video streaming. In this protocol client sends 2-3 subsequent requests to the sever to fetch the video with same url using some pragmas. If the video is present in cache, squid is serving all the requests with the cached data i.e. the video file. This is creating problem. To avoid this scenario I don't want to cache any response from windows media server. susu -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/acl-defined-with-rep-header-used-to-deny-cache-is-not-working-tp4663267p4663273.html Sent from the Squid - Users mailing list archive at Nabble.com.