Check, enable, and disable the Linux system firewall

The Linux system firewall must check, enable, and disable the ping test. Otherwise, the test may fail. View the firewall information: #/etc/init. d/iptables status firewall restart: #/etc/init. d/iptables restart
Disable and enable the Firewall service (do not disable the firewall permanently): www.2cto.com permanently effective: chkconfig iptables on/off (restart takes effect) immediate effect: service iptables start/stop (restart failed) you can also disable the firewall permanently as follows: # chkconfig -- level 35 iptables off # chkconfig-level 35 iptables off you can also directly modify/etc/sysconfig/iptables to add A-A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport 80-j ACCEPT