Most public networks (libraries,schools, official places) have their ports blocked for security reasons. If you want to run toribash on their networks then you need to use third party software to play, such as Hotspot shield, openVPN etc.
Though I don't suggest using these, they might be useful in some cases.
If you cannot connect with a new account then that usually means you're trying to connect a server you shouldnt be able to connect. As some said before me, make sure you connect a server that's appropriate for your belt.