> Is their any way squid can find out type of file and > block downloading (not by url-_regex)
You can use the rep_mime_type acl - just remember that you will have to block it in http_reply_access and not http_access. One other thing you can try - turn on logging of MIME headers to see if Kazaa uses a special MIME type, or maybe something in the UA string. Then block based on that. You might also want to consider putting Kazaa into a very slow delay pool instead of blocking it. If you block it users might try to work around it, but if you just slow it down then they might assume a network problem and give up. > By all above restrictions older versions of kazza > download has stopped but new version are not blocked. Kazaa does put a lot of effort into making the software hard to block. You're starting from scratch, fighting an uphill battle against a moving target. Good luck. Adam
