Installing and configuring SSH server en ubuntu

# sudo aptitude install openssh-server
# sudo vi /etc/ssh/sshd_config

(can change the porth there too)
Protocol 2

PermitRootLogin no

AllowUsers jane
AllowUsers john

# sudo /etc/init.d/ssh restart

Sometimes you may need to limit which hosts can contact the SSH server. Restrictions can be implemented by using the /etc/hosts.allow and /etc/hosts.deny files. The next allows connections only from trusted networks.

# sudo gedit /etc/hosts.allow

# Allow SSH from my own networks
sshd : localhost
sshd : 10. 192.168.
sshd : .mydomain.com .mydomain.net

# sudo gedit /etc/hosts.deny

# Deny everything by default
ALL : ALL : severity auth.info

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