I got a problem on watching youtube or those flash video in our LAN. If I disable our squid, it is smooth but when we start it, I need much more time to download the video. I have try to use no_cache but no use at all: acl QUERY urlpath_regex cgi-bin \? acl NOCACHE dstdomain .youtube.com$ acl SWF url_regex .swf$ no_cache deny SWF no_cache deny QUERY no_cache deny NOCACHE I have also try the following and also no use. acl NO_CACHE url_regex -i "/etc/squid/nocache.url" acl NO_CACHE url_regex ^http://www.youtube.com$ no cache deny NO_CACHE We are using the transparent proxy setting. I have try to googling and find in this mailling list and still can't resolve it.