03-29-2011
It's all in the message. The remote hosts ID has changed, which means that either
- someone has changed the SSH keys of the remote host, possibly by re-installing the service or the complete OS or
- someone is attempting a man-in-the-middle attack, trying to snoop in on your connection
Either way you should try to verify the key, either by looking at the system yourself or asking the systems administrator for the new fingerprint, and not establish connections until you've had that verification.
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