Sequel Ace SSH connection error handling

Apr 8, 2023#sequel #ssh56

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SSH records public keys of visited computers in ~/.ssh/known_hosts to verify them upon future visits. If the public key is different, OpenSSH will issue a warning to prevent attacks. This caused connection issues with MySQL, which were resolved by deleting the problematic server's IP record in ~/.ssh/known_hosts.

SSH will record the public key of every computer you have accessed in ~/.ssh/known_hosts. When you access the same computer again, OpenSSH will verify the public key. If the public key is different, OpenSSH will issue a warning to prevent attacks such as DNS hijacking. This is what has been causing me to be unable to connect to my MySQL through SSH.

vim ~/.ssh/known_hosts

You can see the records of the connections made through SSH, with each record on a separate line starting with the IP address. It is easy to identify the problematic server IP and delete that record to establish the connection.