No Supported Authentication Methods Available on SFTP

Question

I tried to connect to a server using SFTP, but I got the error: “No Supported Authentication Methods Available.” Not sure what’s wrong with the keys. Has anyone fixed this?

Answer 1

If you're getting the "No Supported Authentication Methods Available" error in SFTP, here’s what you can do to fix it: 

Check Server Logs for Errors

• To log in and view auth logs in one simple command, use:  

Update SSH Configuration

• Open the SSH config file:

• Set PasswordAuthentication to yes by running:

 

• To enable challenge-response authentication, run:

       

      

• Press Ctrl + O, then Enter to save. And then Press Ctrl + X to exit.

Restart the SSH Service

• Apply the changes:

Verify File Permissions and Key Configuration

• To set the correct permissions, use:  This sets the .ssh directory to 700 and the private key file to 600.

• So now to verify your key setup, run:

Review SSH Client Logs (Local Machine)

• To see detailed output when connecting with SFTP, enable "verbose mode" by adding -v to your SFTP command:

• Check for errors: Review the output for hints on why the authentication may be failing.