Disable root user remote login

Linux Modify SSH Port 22

Vi/etc/ssh/ssh_config

Vi/etc/ssh/sshd_config

And then modify it to port 8888.

Service sshd Restart as root (Redhat AS3)

Using putty, Port 8888

Linux under the default SSH port is 22, for security purposes, now modify the SSH port is 1433, modify the method as follows:

/usr/sbin/sshd-p 1433

To enhance security

First, add a user with normal permissions:

#useradd Uploader

#passwd Uploader

Set Password

The production machine prohibits root remote SSH login:

#vi/etc/ssh/sshd_config

Put

Permitrootlogin Yes

Switch

Permitrootlogin No

Restarting the SSHD service

#service sshd Restart

Remote Management log in with normal user uploader, then switch to root user with Su root to get the highest privileges

Linux system root user is omnipotent, in order to system security SSH prohibit root user telnet, if necessary, using the sudo mechanism is also a good choice

Edit/etc/ssh/sshd_config

Modify Permitrootlogin to change Yes to No

Restart the SSH service

Service sshd Restart or

/etc/init.d/sshd restart

Disable root user remote login