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How to revoke trust for a previously trusted SSH server key.

To revoke trust for an already trusted SSH server key you have to find the stored copy of that key and delete it.

The key file will be in one of 2 places:

  1. %installdir\programdata\Known SSH Sites
  2. My Documents\Robo-FTP 3.9\Known SSH Sites

The file will be named after the hostname you are connecting to. For example, if in your site definition you have the URL/IP address field set to "" then the file containing the trusted key fingerprint will be named "" Delete that file and that key fingerprint will no longer be trusted.

UPDATE: As of Robo-FTP 3.10, look for known sites stored for the current user in %installdir\UserData\username\Known SSH Sites instead of My Documents as listed above.

Article last updated: 2021-01-18

Tags: SSH, SFTP, Robo-FTP