How can I troubleshoot and resolve the issue of “no supported authentication methods available”?
I am currently doing a specific task that is related to connecting to a remote server, however during this specific task I encountered a scenario where an error’ messy occurred which was showing “no supported authentication methods available”. How can I troubleshoot and resolve this particular issue?
In the context of AWS, if you are getting the issue of “ no supported authentication methods available” then you can follow the following steps for troubleshooting and resolving this particular issue:-
Checking SSH keys
Try to ensure that the SSH keys are you using are correct and should match the public key that is added to the authorized server.
Key permission
Try to verify the permission of your SSH key files. Remember that they should be set to 600(chmod 600 key.pem) to ensure proper security.
SSH version
Try to make sure that your SSH client and even server versions are compatible as outdated versions would possibly not support certain authentication methods.
SSH Configuration
You can review the SSH client configurations. You should ensure that the authentication method is configured in your particular SSH client.
Server-side Configuration
You should also check for the SSH daemon on the server. Try to ensure that the methods of authentication should be allowed by SSH daemon.
Restart SSH service
You are recommended that if you make changes to your particular server-side Configuration, then you should restart the SSH service to apply the changes that you have made.
Here is the example coding given:-
# Ensure correct permissions for the SSH key
Chmod 600 key.pem
# Attempt to connect with verbose output for detailed information
Ssh -v -I key.pem user@your_server_ip