Centos firewall configuration

[Damien25]

I am looking for explanation on centos firewall configuration. Does any know how to disable the centos firewall? What is procedure to configure CentOS Firewall From Command Line? I have already search for the program and i found some program where you can set WWW and FTP allowed but need to know information about configuration.

[Calvin K]

A Linux firewall is software based firewall that provides protection between your server (workstation) and damaging content on the Internet or network. “The chkconfig command is used to update and queries runlevel information for system service. It is a system tool for maintaining the /etc/rc*.d hierarchy. Use this tool to disable firewall service at boot time.”

[Lillebror]

Thsi are command used while configuring centos firewall :

/sbin/service iptables save
/sbin/service ip6tables save
/sbin/service iptables off
/sbin/service ip6tables off
/sbin/service iptables stop
/sbin/service ip6tables stop

[MrChris-]

Netfilter is a host-based firewall for Linux operating systems. It is included as part of the Linux distribution and it is activated by default. # vi /etc/sysconfig/iptables is the command to enter in to ip table. Netfilter firewall is controlled by the program called iptables. netfilter is a set of hooks in kernel that allows kernel modules to register callback functions with the network stack.Netfilter filtering take place at the kernel level, before a program can even process the data from the network packet.

From command line to configure centos firewall run:

/usr/bin/system-config-securitylevel-tui

Configure the settings to your needs.

[Devasis]

Red Hat Enterprise Linux 5 and its derivative CentOS 5 includes a graphical tool called Security Level Configuration for configuring the firewall options. During the Firewall Configuration screen of the Red Hat Enterprise Linux installation, you were given the option to enable a basic firewall as well as to allow specific devices, incoming services, and ports.