To modify the sshd default port _linux

The specific steps are as follows:

Modifying a configuration file

Copy Code code as follows:

Vi/etc/ssh/sshd_config

Find "Port 22", remove the annotation, and change to the new port number, for example:

Copy Code code as follows:

Port 22342

Then save the exit, be sure to remember this port number, or once you exit the current client will not be connected.

Two restart sshd

Copy Code code as follows:

/etc/init.d/sshd restart

The new port will be in effect at that time, but the current connection will not be disconnected

Three verify that the new port is open

Copy Code code as follows:

Telnet 1.2.3.4 22342

Prompt "ssh-2.0-openssh_x.x" to indicate that it has been in effect, if the prompt "can not open to the host connection, in the port xxxxx: Connection Failed" to explain that the modification failed, and then look for reasons.