Linux Setup opens a port

Modify the firewall configuration needs to modify/etc/sysconfig/iptables This file, if you want to open which port, add a bar inside.

-A rh-firewall-1-input-m state--state new-m tcp-p TCP--dport 1521-j ACCEPT

Yes, where 1521 is the port number to open, and then restart the Linux Firewall service.

To stop/start the Firewall service command:

After logging in with Root, execute

Service Iptables stop--stop

Service iptables Start--Start

(Service command is located in/sbin)

Firewall rules can only be activated when the Iptables service is running. To start the service manually, use the following command:

/sbin Rvice iptables Restart

To ensure that it starts at system boot time, use the following command:

/sbin/chkconfig--level 345 iptables on

The IPChains service cannot run concurrently with the Iptables service. To determine that the IPChains service is disabled, execute the following command:

/sbin/chkconfig--level 345 IPChains off

Linux Setup opens a port