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Unit 6: Domain Name System

But the profit of having your own non-production domain goes beyond just DNS. It also comes notes
in handy for testing Sendmail e-mail server and Apache Web server configurations, etc. For
instance, you can see if your Debian system properly sends and receives e-mail for your non-
production domain. Or you could install a test cerfificate (available for free from most certifying
authorities like Thawte or Verisign) on your Debian system acting as a Web server so you can
investigate SSL functionality. Just about any type of Internet server you want to play with will
have more functionality when you can give it a registered domain name that has DNS resolution
capabilities. And if you don’t have any plans to eventually use it as a production domain, just
let it expire after the first year is up and the knowledge gained will be well worth the 35 bucks.
Support for dynamic DNS is disabled by default which is fine if you do have static IP address(es)
on your server(s).

ddclient Configuration File for EasyDNS

We’ll install ddclient in a bit. It’ll prompt you for the essential configuration information during
the install. When it’s finished it’ll create the /etc/ddclient.conf file and it should look something
like this (the information you enter during the client install is in blue):
# Configuration file for ddclient generated by debconf
#
# /etc/ddclient.conf

pid=/var/run/ddclient.pid
protocol=easydns
use=if, if=eth0
server=members.easydns.com
login=bgates
password=luvlinux
my-last-name.net

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