How to Restrict SSH login to a Specific IP or host in Ubuntu?

Step1. Login to the server with SSH access.

Step2. Login to the server with root access.

Step3. Open file /etc/hosts.deny by using a text editor.

    # vi /etc/hosts.deny 

Step4. Add the following line to deny all incoming SSH connections to the server:

    # sshd: ALL

Step5. Save and close the file.

Step6. Open the file /etc/hosts.allow file by using a text editor:

     # vi /etc/hosts.allow

   Add the following line to allow incoming SSH connections for specific ip or host to the server.

        sshd : localhost

        sshd : 192.168.0.

        sshd : 99.151.250.7

Step7. Save and close the file.

You can allow or deny based on IP address, subnet, or hostname.

THANK YOU!!!