>The server won't deliver the file unless the tokens are in place. Whenever a file is fetched, it appears to be the same irrespective of the tokens. I will carry out more research based on checksums of multiple files to make sure. < I very doubt ".... to be the same ..." . Because this would not make sense. youtube does something similar for their videos, and there the tokens contain add info like resolution of the movie, as it is distributed in different ones. Depending upon actual connection speed, for instance. So, the only reason to have "random" tokens in your case would be to confuse the caches, which I doubt. OR it might signal some info regarding the size of the range requests. Then it would be safe to ignore the tokens, as you are considering, as the complete file will be cached within squid, and the different ranges serviced from there. (Note: This is something, youtube did some time ago. ) So you might test with different connections speeds, too. -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Re-Cache-Windows-Updates-ONLY-tp4665520p4665525.html Sent from the Squid - Users mailing list archive at Nabble.com.