If you are using SSH keys, disabling access to the server via password will be a useful additional security measure for you.
Switching off via nano
Use the following command:
We get into the sshd config.
We find the string PasswordAuthentication yes
We need to remove the grid (#) so that the row becomes active. And then we change the value of yes to no.
Press Ctrl + X, enter Y to save.
Restarting the SSH service:
Disconnection via sFTP
In the panel above the file manager, we need to erase the standard path /root and specify /etc/ssh
In this directory, we need to open the sshd_config file.
We find the corresponding PasswordAuthentication yes string.
Remove the grid (#) so that the line becomes active. And then we change the value of yes to no.
We save the file and send it to the server.
Restarting the SSH service:
Using an SSH key in sFTP
After enabling access only via SSH key, a problem may arise when connecting via sFTP, which is extremely simple to solve at the moment.
FileZilla
Click on the Edit category and select Settings
Then select the sFTP page and click the Add Key File button.
Select the location and add the file.
The key has been added, now FileZilla will take it into account when trying to connect to servers.
WinSCP
Click on the button to create a new connection:
A window opens. Here we specify the IP address of the server and the Username.
Use the More button under the Password line.
In the window that opens, select the Authentication section.
Add the private key and click OK.
We are trying to connect to the server.
The program requests the secret key code, we enter spacecore:
We have connected to the server!
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