I. Open/Close Firewall command under Linux 1) permanent, no recovery after restart: Chkconfig iptables on off: chkconfig iptables off 2) immediate effect, restart restore:/etc/ Init.d/iptables start off:/etc/init.d/iptables stop It is necessary to note 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 two. Ubuntu off firewall iptables-a input-i! PPP0 -j accept three. CentOS Linux firewall configuration and shutdown execute the "Setup" command to start the text mode configuration Utility, select "Firewall Configuration" in "Select a tool", and then select the "Run Tool" button The firewall configuration interface appears, set the security level to disabled, and then select OK. or by command: #/sbin/iptables-i input-p tcp–dport 80-j accept#/sbin/iptables-i input-p TC P–dport 22-j accept#/etc/rc.d/init.d/iptables Save after you restart your computer, the firewall defaults to 80 and 22 ports. This should also not restart the computer: #/etc/init.d/iptables Restart shut down the Firewall service to: View firewall information: #/etc/init.d/iptables Status Shutdown Firewall service: #/etc/init.d/iptables stop permanently closed? Do not know how a permanent method: #chkconfig--level iptables off
Turn off the firewall under Linux
