How Linux shuts down the firewall

1)   After restart effective   on: chkconfig iptables on  off:  chkconfig iptables off  2)   Immediate effect, restart after failure   on: service iptables start  off:  service iptables  stop  It should be explained 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 

/etc/init.d/iptables status temporarily shuts down the firewall:
/etc/init.d/iptables Stop restart Iptables:
/etc/init.d/iptables Restart

1./etc/init.d/iptables stop or service iptables stop
2.chkconfig--level iptables off
3.setenforce 0
4.vim/etc/sysconfig/selinux, modified to: Selinux=disabled and selinuxtype=disabled.

How Linux shuts down the firewall