SSH on Linux

To verify wether the SSH port is open or not, I use the Nmap tools:
Silver-Surfer:~ DragonX$ nmap -p22 192.168.1.10

Starting Nmap 4.53 ( http://insecure.org ) at 2008-02-13 10:52 ICT Interesting ports on 192.168.1.10:
PORT STATE SERVICE
22/tcp closed ssh

To open the port:
#/usr/sbin/lokkit