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Chapter 8: Local Network Services

subnet 192.168.1.0 netmask 255.255.255.0 {

option routers 192.168.1.1;

option subnet-mask 255.255.255.0;

option domain-name-servers server1.centralsoft.org,

server2.centralsoft.org;

range 192.168.1.2 192.168.100.254;

}

Another Approach to Gateway Services

This section covers the use of packaged gateway and firewall combination products

with multiple feature sets. Several free packages exist, such as Firestarter, IPCop,

Netfilter, and Shorewall. You will see Smoothwall and ClarkConnect mentioned in

Linux literature, but these are commercial products that install an entire Linux distri-

bution, not standalone applications.

For use in this chapter, we chose Firestarter. However, you may want to take a look

at Shorewall, a configuration utility for Netfilter (a command-line tool).

You can download Firestarter from the Fedora repositories. Our installation had the

following package:

[root@host2 ~]# rpm -q firestarter

firestarter-1.0.3-11.fc5

[root@host2 ~]#

The Firestarter Firewall Wizard (Figure 8-5) launches when an administrator starts

the program the first time. You can relaunch the wizard from the Firewall menu in

the main interface, as well as change the choices through the Preferences option.

Figure 8-5. The Firestarter Firewall Wizard

Gateway Services

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