Note: There is no practical difference between the subdomain Most home users have an IP address that can change hour to hour and this complicates building a home website and making it accessible to everyone on the internet.
A service called DYNAMIC DNS allows users anywhere on the Internet to find your website(s) and/or mail server(s) with their constantly changing IP address.
For those who you wish to learn how to use ISC's BIND and DHCP, for example as a learning exercise, this is how I got it all to work in Debian Sarge, the current stable version of Debian GNU/Linux.
This short article was prompted by my question on the Debian-Administration forum site, where I was able to get some answers to the issues I faced and I did promise to post a solution if I got one.
You can have a perfect setup, but already have something there, and it will complain.
If it is the default route it is complaining about, you can remove it by running to stop believing that it has already configured the interface.
The Postfix configuration file specifies a very small subset of all the parameters that control the operation of the Postfix mail system.
Parameters not explicitly specified are left at their default values.
The parameter name must contain only characters from the set [a-z A-Z0-9_].
You will need to place your DNS server address on the first line of this file and remember to end the line with a carriage return (hit enter) as seen below: It is better to add nameserver information to Network Manager connections (if you are using Network Manager) as described by bodhi.zazen, or to interface definitions in /etc/network/interfaces (if you are using ifup) than to add the information statically and globally to /etc/resolvconf/d/base.
For the average home computer user there is no need to install a complex package such as the Internet Software Consortium's BIND DNS or DHCP server, since there are far simpler lower resource tools to use, for example dnsmasq.
A user could also add a mail service on the same machine using the same mail server software.
Suppose also that you have a website at you wish to access the site by the alias of being able to enter perhaps or maybe