[ubuntu] Squid choking connection

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http://ubuntuforums.org – Hi all, We are having a problem with traffic passing through our Squid proxy server, where by it is reducing the bandwidth of clients passing through it to 10% of that of clients NOT passing through it's proxy. The ONLY function of this is URL filtering. There is no user management, reporting, bandwidth allocation etc on this. The server isn't used for anything else. I've been through pretty much everything, and can't see any reason why this may be like this. We were not having any problems with this before summer. (PS. We are a high school). The squid proxy is only applied to student pro (Hardware)