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linuxubuntusshssh-keygen

SSH still asking for password despite conf and permissions set up

I have a remote server (Contabo), and a Host (my Dell computer). I have created a new sudo user laura instead of using root all the time, with:

adduser laura
usermod -aG sudo laura

I have generated SSH keys on my Dell computer with the following command:

ssh-keygen -t rsa -b 4096

The ssh-copy-id did not work, however I've used this command to send the public key newly generated, into my Contabo Server:

sudo scp id_rsa_contabo.pub laura@:/home/laura/.ssh/

Of course I have replaced with the IP of my Contabo server. I can see the public key inside my .ssh folder, which I insert into an authorized_keys file.

However, no matter what I do (and I've been trying for hours now), when I do this:

ssh laura@<IP>

With < IP > replaced by the IP address of my Contabo server, the system still asks me for a password!

What I've tried so far:

  • I made sure permissions were correct, as I read several articles on StackOF saying the .ssh folder should be set at 700 and the authorized_keys file should be at 600.

  • The naming is correct: authorized_keys with Z instead of S. Also, when I've generated a pair of key, I've named it id_rsa_contabo, and I did the following:

    ssh-agent bash

    ssh-add ~/.ssh/contabo_rsa

This is because my file does not match the default naming convention for keys (normally it’s id_rsa).

  • Trying to see what's going on in the var/log/auth : I can see bots trying to brute-force my server and failing, and I can also see myself connecting to the Contabo server with a password : nothing strange in this file to me.

  • Trying the following command:

    ssh [email protected] -v

No error message, however my file id_rsa_contabo (the one in the authorized_keys) is not even read by the system. See my screenshot for the output of this command:

screenshotssh

  • Trying the following command to force the system to use my newly generated key :

    ssh -i id_rsa_contabo.pub [email protected]

  • I have checked the content of /etc/ss/ssh_config and /etc/ss/sshd_config. I have the following in both:

    RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile %h/.ssh/authorized_keys .ssh/authorized_keys2

.

Nothing seems to work. Please can a good samaritan help me? :(

Solution

  • It works now (after I came in the office the next day). I believe I forgot to restart the services with the following command...

    systemctls restart ...