The simple configuration of firewall under Linux and the introduction of inserting rules _linux

View the current firewall settings

Delete a policy, such as the 4th line policy

Iptables-d INPUT 4

-A: Insert at tail

-I inserts a new rule in the specified chain, which is inserted into the first row

(For example: Insert on line seventh)

Iptables-i INPUT 7-p tcp-m State--state new-m TCP--dport 81-j ACCEPT

and then save

Service Iptables Save

and then reboot.

Service Iptables Restart

The above is a small set to introduce the Linux firewall under the simple configuration and insert rules, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!