Most network administrators at work, university or school deny access to file sharing or instant messaging services with a firewall or proxy server. If you are constantly getting a message saying "Can't connect" or something similar, the service you are trying to connect to has probably been blocked by your network administrator.
bypass proxy: hopster is a small application that lets you get around the firewall or proxy, so you can use a file sharing or instant messenger program even from behind a firewall. It is a free download, and it installs itself in a minute - no complicated configuration steps needed.
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