Welcome

Quick how-to secure your ssh on linux server.

Instructions

1. First add user

   sudo adduser <UserName>
   

2. Add user to sudoer group

   sudo usermod -aG sudo <UserName>
   

3. Edit ssh configuration file

   sudo nano /etc/ssh/sshd_config
   

   Add these to end of the file:

   ClientAliveInterval 360 # ssh Timeout
   ClientAliveCountMax 0 
   PermitEmptyPasswords no #Empty password text not permited
   AllowUsers <UserName> # Only alows entered users here
   Protocol 2 # User ssh protocol 2 (Latest)
   Port 222 # Change Port
   

4. Copy your ssh key to the server via (Mac/Linux)

   ssh-copy-id <UserName>@10.0.0.1 -p 222 For Windows: Login via ssh, cd into .ssh folder
   
   nano authorized_keys Now you have created a new file where you can copy your personal computers pub key. Once you have completed above instructions, now you can disable password login
   
   sudo nano /etc/ssh/sshd_config add last line to the config file
   
   PasswordAuthentication no
   

5. Restart ssh services

    sudo service sshd restart