iptables and firewall in centos

http://blog.1024code.com/120.html

CentOS7出现Unit iptables.service could not be found

The default firewall of CentOS7 is not iptables, but firewalle.

This may happen because the iptables firewall is not installed.

 

 

 

https://blog.csdn.net/bbwangj/article/details/74502967

Open, close, view status, basic settings, etc. of iptables and firewall firewalls in centos