The root user cannot modify iptables. the root user iptables

The root user cannot modify iptables. the root user iptables

Requirement: Because the firewall imposes IP and port restrictions, you need to add a rule to allow access to the specified IP address and port.

Vi/etc/sysconfig/iptables. After the file is added, wq is saved, prompting that the file cannot be saved only !!!

Solution:

1. Check the file permissions and find no problems.

2. view the file property lsattr iptables and display: ---- I -------- iptables. It means that the file is locked and cannot be deleted and cannot be modified. The problem is found.

3. Execute chattr-I iptables

4. Modify iptables again and save the settings. You can save the settings successfully ~~

Command Description: attributes of the chattr append File

Lsattr display file attributes

Copyright Disclaimer: This article is an original article by the blogger and cannot be reproduced without the permission of the blogger.