Linux logon limits users and IP addresses

Linux logon limits users and IP addresses-Linux Enterprise applications-Linux server applications. The following is a detailed description. 1. Restrict IP login:

1: hosts. allow in the/etc/directory is the IP configuration file that can be logged on. If the currently available IP address range is 192.168.0.0

It can be set:

Sshd: 192.168.0.0/255.255.255.0)

2: hosts. deny under the/etc/directory is the restricted IP configuration file, set to all cannot log on

Sshd: all

The two configuration files are finally configured to log on to the system through SSH only the IP address in the 192.168.0.0 network segment!

Ii. restrict user login:

1. Modify/etc/pam. d/sshd.

Auth required pam_listfile.so item = user sense = allow file =/etc/sshusers onerr = fail

2. Add users

Echo "root">/etc/sshusers