How do CentOS7 modify the SSH login port

centos7 changes the default login port of ssh to be similar to centos6, that is, the firewall is not as good, and then selinux is best closed.

[Modify ssh default port 22]

vi /etc/ssh/sshd_config

Add a line below Port 22, for port 50000, Port 50000

Then save and restart ssh service systemctl restart sshd.service

[New port released in firewall]

firewall-cmd --permanent --add-port=50000/tcp

Query with this command

firewall-cmd --permanent --query-port=50000/tcp

If it was yes, it was added successfully; if it was no, it was unsuccessful

Successful reload firewall ES32en-ES33en? reload

[Close selinux]

View selinux status sestatus, if enabled is on

vi /etc/selinux/config

Modify SELINUX = disabled

Then restart vps and try to log in with the new 50000 port. If the login is successful, delete Port 22 and restart the ssh service.