Replacing OpenSSH server with dropbear
dropbear is a SSH 2 server and client designed to be small enough to be used in small memory environments, while still being functional and secure enough for general use.
It implements most required features of the SSH 2 protocol, and other features such as X11 and authentication agent forwarding.
1. Install dropbear
apt-get install dropbear
Disable root login to SSH
Allowing root logins to your SSH damon is a big security threat. If the SSH port is open, hackers will probably at some time attempt to brute force your root password. It's a good idea to disable root logins to SSH and instead use a normal user to login and type "su -" to enter the super user shell or sudo to perform tasks that require root privileges.
1. Open the SSH daemon config file and change this line: (pico /etc/ssh/sshd_config)
PermitRootLogin no
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