View, turn off, and turn on firewall commands under Linux

View, turn off, and turn on firewall commands under Linux

1) Permanent, no recovery after reboot
Open: Chkconfig iptables on
OFF: Chkconfig iptables off
2) immediate effect, failure after reboot
Open: Service iptables start
Close: Service iptables stop
It should be stated that for other services under Linux, the above command can be used to perform the open and close operations.
When the firewall is turned on, do the following settings, open the relevant port, modify the/etc/sysconfig/iptables file, add the following:
-A rh-firewall-1-input-m state--state new-m tcp-p TCP--dport 80-j ACCEPT
-A rh-firewall-1-input-m state--state new-m tcp-p TCP--dport 22-j ACCEPT
3) View firewall status
Chkconfig iptables--list
Note: Before Redhat 6.5, the libvirted service needs to be banned because the libvirted service will boot up the firewall. The command is as follows:
Chkconfig libvirted off

View, turn off, and turn on firewall commands under Linux