To add a port to open in a firewall rule

System Environment: CentOS 6.5

Add an entry under the firewall file, but note the location of the entry;

[Email protected]debris ~]# vi/etc/sysconfig/iptables

# Firewall configuration written by System-config-firewall
# Manual Customization of this file are not recommended.
*filter
: INPUT ACCEPT [0:0]
: FORWARD ACCEPT [0:0]
: OUTPUT ACCEPT [0:0]
-A input-m state--state established,related-j ACCEPT
-A input-p icmp-j ACCEPT
-A input-i lo-j ACCEPT
-A input-m state--state new-m tcp-p TCP--dport 22-j ACCEPT
-A input-m state--state new-m tcp-p TCP--dport 23-j ACCEPT
-A input-m state--state new-m tcp-p TCP--dport 3306-j ACCEPT
-A input-m state--state new-m tcp-p TCP--dport 8080-j ACCEPT
-A input-j REJECT--reject-with icmp-host-prohibited
-A forward-j REJECT--reject-with icmp-host-prohibited
COMMIT

！ Attention! , you cannot add an entry under Commit, or it will fail!

This article is from the "Debris Memory" blog, please be sure to keep this source http://debris.blog.51cto.com/1614432/1619607

To add a port to open in a firewall rule