ssh putty keyboard-interactive authentication access denied

When you try to access your server using SSH do you get an access denied error? Please make your PuTTY settings match the picture below in regards to keyboard-interactive authentication errors.

keyboard-interactive-authentication
  1. PuTTY Configuration
  2. Connection
  3. SSH
  4. Auth
  5. Make sure these boxes are checked:
    • Display pre-authentication banner (SSH-2 only)
    • Attempt authentication using Pageant
    • Attempt “keyboard-interactive” auth (SSH-2)

Searching on the web using phrase “keyboard-interactive authentication” will also yield helpful solutions.

The error could be caused by an incorrect password. Make sure that you are not including any spaces if you are copy / pasting the password into Putty.

One more thing, in high-security environments sometimes keyboard interactive methods may be disabled by default to prevent brute-force login attempts.

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