Howto : Add user and Secure your ssh access

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One of the biggest security holes you could open on your server is to allow directly logging in as root through ssh. This howto shows you how to add a new user to your server  so  that you can su or sudo to root from it .

We will begin by how to add a new user to your server,after we will show how  to disable root login and use sudo instead.

First Open your terminal, as root type the commands :

and restart your sshd :

vi /etc/ssh/sshd_config  or gedit /etc/ssh/sshd_config

# default value.                       # default value.                             
#Port 22              chage with     port 31022 (without #)
#Protocol 2,1                           #Protocol 2,1
Protocol 2                               Protocol 2
#AddressFamily any                 #AddressFamily any
#ListenAddress 0.0.0.0            #ListenAddress 0.0.0.0
#ListenAddress ::                    #ListenAddress ::

3- Also we advice you to set the LoginGraceTime, the LoginGraceTime configures the server to disconnect the user after a set amount of time if they have not successfully logged in, to do that , always in your sshd_config file :

LoginGraceTime 20s

PermitRootLogin no
#StrictModes yes
MaxAuthTries 3

4-Now restart SSH. As root run the command:

/etc/init.d/sshd restart

Now you can run your sshd secure, and will make it hard for others to login to your server.

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