CentOS to modify SSH default 22 port

I am a student party, the school's network restrictions on the comparison of strict, this can not be on that can not log on. Windows 3389 is not available and Linux 22 ports are not available.

All will need to modify the port to implement.

First, find a way to connect to your Linux server.
(Mobile hot can OH)

First modify the configuration file

Vi/etc/ssh/sshd_config

Find #port 221, here is the identity default use 22 port, modified to the following:

Port 22
Port 1234

Change it to 1234.
Then save the exit.

Perform

/etc/init.d/sshd restart
This way the SSH port will work concurrently with 22 and 1234.

Edit firewall configuration now: Vi/etc/sysconfig/iptables

Enable Port 1234.
Perform/etc/init.d/iptables restart

Now, use the SSH tool to connect to port 1234 to test for success. If the connection succeeds, edit the Sshd_config settings again and delete the Port22 inside.