Linux Centos 6.9 in SSH default port modified pits

About the Linux Centos6.5 ssh default port modification Blog There are a lot of, I am not verbose here, but in the face of CentOS 6.9, you will find a giant pit;

After modifying Iptables, execute the following command;

# Service Iptables Save

You will find that the Dport modification failed with the port number still 22,

At this point, you will be very depressed to find no matter how the changes are not effective,

The point came, I tried countless times to find out,

Execute the following command first:

# Service Iptables Restart

At this time, unexpectedly modified successfully, and then modify the sshd configuration file, this time to take effect,

Then log back in and then execute the SAV command,

Perfect solution.

Linux Centos 6.9 in SSH default port modified pits