Firewall for Linux
From KlavoWiki
To disable/enable the Linux firewall use the following command:
system-config-securitylevel-tui
If the package is not installed you can install it by using the following yum command.
yum install system-config-securitylevel-tui.i386
To disable selinux on CentOS 6 which is not displayed in the above mentioned TUI edit
/etc/selinux/config
SELINUX=disabled