SFTP key authentication required
Why SFTP servers require SSH key authentication and how to configure keys correctly.
Diagnose this automatically
Verify whether authentication is the actual failure point.
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Many SFTP servers require SSH key authentication instead of passwords.
Common causes
- Password authentication disabled
- Missing public key
- Incorrect key permissions
Fix checklist
- Generate SSH key pair.
- Install public key on server.
- Ensure correct permissions on ~/.ssh.
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Related
- SFTP permission denied — Why SFTP returns permission denied errors and how to fix file or directory permissions.
- SFTP host key verification failed — Why SSH host key verification fails and how to resolve known_hosts conflicts.
- SFTP authentication failed — Why SFTP authentication fails and how to fix password or SSH key issues.
- SFTP subsystem request failed — Why SFTP subsystem requests fail and how to configure SSH servers correctly.
- Authentication failed — Why FTP/SFTP authentication fails and how to correct credential, key, and account policy issues.
- SFTP directory listing failed — Why SFTP connects but cannot list directories, and how to fix path, permissions, and chroot issues.
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