I have a problem: I've been given an account on a testing-box. My public RSA key has been added to my account and I can connect just fine using programs such as WinSCP or Git bash. However, when I try to use PuTTY, like I always do, the server immediately closes the connection, only displaying
Server unexpectedly closed network connection.
WinSCP also has a feature to open the current connection using PuTTY. Note: I am already successfully connected to the server at this point using my username and public-key. However, this results in the same
Server unexpectedly closed network connection message immediately.
I have tried to connect to the server with no credentials pre-entered but was unable to do so either (same message).
What reason could this have, and how can this be resolved?