ssh putty keyboard-interactive authentication access denied

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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.

  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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