Refer: LifeHacker
Ubuntu 8.10
sudo apt-get install ssh
Stop the server
sudo /etc/init.d/ssh stop
Start the server
sudo /etc/init.d/ssh start
Restart the server
sudo /etc/init.d/ssh restart
You probably want to change security for users allowed SSH login and disable root from SSH login
Edit this file:
vi /etc/ssh/sshd_config
Un-comment the following line:
PermitRootLogin no
Now restart the SSH server
/etc/init.d/sshd restart
SSH with Public Key
Refer: Cyberciti
Idea: Install Ubuntu in Virtual PC hang outside firewall and use for SSH uninstall samba and perhaps a whole bunch of other stuff too.
Use GuardDog to install a firewall, and lockdown everything except SSH. Tested inside proxy, and it was necessary to enable Internet, HTTP, HTTPS and also Network, Windows Networking (NETBIOS). This seemed to do a good job of locking down pretty much everything.