Changes

# Before we can use this new port we must change our firewall to allow traffic through the new port number and block access to port 22 by issuing the command:<br /><b><code><span style="color:#3366CC;font-size:1.2em;">iptables -I INPUT -p tcp -s0/0 --dport 2200 -j ACCEPT</span></code></b><code># Next, we will drop any incoming traffic to port 22 by issuing the command:<br><b><code><span style="color:#3366CC;font-size:1.2em;">iptables -I INPUT -p tcp -s0/0 --dport 22 -j DROP</span></code><br /b># We have now possibly mislead a potential "hacker" to the true port for our ssh server's communication channel (port). To test the new port connect to '''centos1''' from '''centos2''' using the following command:<br /><b><code><span style="color:#3366CC;font-size:1.2em;">ssh -p 2200 user@centos1</span></code></b>