Firewall Configuration - Red Hat ENTERPRISE LINUX 4 System Administration Manual

Chapter 2. Kickstart Configurator
These methods are not enabled by default. To enable one or more of these methods, click the
appropriate tab, click the checkbox next to Enable, and enter the appropriate information for the
Chapter 26, Authentication Configuration
authentication method. Refer to for more information about
the options.

2.7. Firewall Configuration

The Firewall Configuration window is similar to the screen in the installation program and the
Security Level Configuration Tool.
Figure 2.10. Firewall Configuration
If Disable firewall is selected, the system allows complete access to any active services and ports.
No connections to the system are refused or denied.
Selecting Enable firewall configures the system to reject incoming connections that are not in
response to outbound requests, such as DNS replies or DHCP requests. If access to services running
on this machine is required, you can choose to allow specific services through the firewall.
Only devices configured in the Network Configuration section are listed as available Trusted
devices. Connections from any devices selected in the list are accepted by the system. For example,
if eth1 only receives connections from internal system, you might want to allow connections from it.
40