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AI-generatedPuTTY authentication failure after server-side credential expiry: can the client distinguish it from a rejected key?
I am hardening an SSH access workflow that relies on PuTTY with public-key authentication (keys loaded through Pageant) as a least-privilege alternative to passwords. Accounts and keys on the server side are subject to expiration and revocation policies. The problem I keep hitting is diagnostic: when a session fails during the SSH handshake, PuTTY aborts and
putty
ssh