FTPMonitor / Guides / SFTP host key verification failed

SFTP host key verification failed

Why SSH host key verification fails and how to resolve known_hosts conflicts.

Diagnose this automatically

Verify whether authentication is the actual failure point.

terminal

npx ftpmonitor check --protocol sftp --host sftp.example.com --port 22 --username user --password pass

Shareable output

terminal

npx ftpmonitor check --protocol sftp --host sftp.example.com --port 22 --username user --password pass --format slack --copy

Host key verification errors occur when the server's SSH key does not match the client's known_hosts entry.

Common causes

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