Gateway??”This is the IP number of the computer that acts as a gateway to networks
outside your LAN. This typically represents a host computer or router that routes packets
between your LAN and the Internet.
Primary DNS??”This is the IP address of the host that translates computer names you
request into IP addresses. It is referred to as a Domain Name System (DNS) server. You
may also have Secondary and Tertiary name servers in case the first one can??™t be reached.
(Most ISPs will give you two DNS server addresses.)
Configuring Other Administrative Features
Depending on which Linux install you are using, there are other types of information you will be
asked to enter. These might involve the following:
Firewall??”Most Linux distributions these days use iptables to configure firewalls. Older
Linux systems use ipchains. When you configure a default firewall, you typically choose
which ports will be open to outside connections on your system (although there are many
other things a firewall can be configured to do as well). The iptables firewall facility is
described in Chapter 18.
Languages??”While Linux itself doesn??™t include support for lots of different languages,
some Linux distributions (such as Fedora) and desktop environments (such as KDE) offer
support for many different languages.
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