Configuring SSH on Debian GNU/Linux 4.0
1. Login as root
2. Install OpenSSH by running command:
apt-get install ssh
3. open file /etc/ssh/sshd_config and add these values:
#Authentication
PermitRootLogin no
MaxAuthTries 2
First one blocks access for root, so then you can login with a standard account and hit su to switch to the root user. Second one disconnects from the session after two failed login attempts.
You can also add this line:
AllowUser your_username
It allows only specified user to log in using ssh. After logging in as a standard user just su and you have all root privileges.
