Most DSL broadband internet service providers and many
cable companies change the IP addresses of their customers frequently. In the
case of DSL, the change generally occurs each time the customer connects to the
Internet, while with cable, the changes can occur at any point.
It might seem impossible to host a web site from an IP address that
potentially changes every day, but it can actually be done quite easily through
the magic of dynamic DNS.
What is Dynamic DNS?
Dynamic DNS services provide their clients with a DNS address (as covered above) and
install a small application on the client's computer which monitors its current
ISP-designated IP address. When that IP address changes, the application alerts the
dynamic DNS provider who then updates the client's DNS records with the new
IP. In this way, visitors who try to access the client's web site using
his DNS address will always be directed to the right IP address, no matter how
many times a day it changes.
Several companies offer free dynamic DNS service over the Internet.
Generally speaking, you sign on for a free membership and pick a DNS name from
the ones the company has on offer. This does provide you with limited options
for personalizing the address of your website, since most dynamic DNS companies
will only allow you to customize the 'server' part of the address they give
you. For example, you might be presented with '*****.sytes.net' and be
allowed to customize the asterisked portion.
Fortunately, most domain registration services allow you
to redirect your registered DNS name to another DNS name. This means you can
register the domain name of your choice then
redirect it to your yourwebsite.sytes.net dynamic DNS address,
which then redirects visitors to your constantly updated IP address.
To set this up, you'll first have to register with
a dynamic DNS provider. Some of the more popular free dynamic DNS sites are DynDNS.org
and No-IP.com, but there are
many, many more. Here's a list to get you
In most cases, the dynamic DNS provider will lead you
through the process of setting up dynamic DNS, which includes choosing a domain
name from the provider and downloading and installing their client software.
There are several other options that dynamic DNS providers may offer, such as
aliases (which allow you to map multiple domain names to your computer's
IP address) and MX records for email, but
we're not going to cover these in detail in this
Once the dynamic DNS is all set up, test it by opening
up a web browser and entering the domain name you got from the dynamic DNS
provider. Provided your web site is up
and running in IIS, you will now be seeing your website from across the Internet.
Now all you have to do is ensure that the dynamic DNS
update program you downloaded from
the provider is running at all times, and
anyone will be able to access your website from the