I tried to use PuTTY yesterday. I logged in through a pre-existing SSH connection, but the window froze up and would not let me do anything. Then after a few seconds, it gave me the error message saying that PuTTY had timed out. I tried logging in multiple times, and even to different servers, but sadly, each time yielded the same result.

I was able to connect to the network a few weeks ago, but not yesterday. This is a school network and no changes have been made to it recently. I have made no significant changes to my computer recently either. I have no idea what to do beyond the instructions my professor gave me, and that is how I have been trying to do it.

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