What is Dynamic DNS?
Dynamic DNS is a Domain Name Service that is used with Dynamic IP addresses. DNS is used to allow devices to find other devices on the Internet by name rather than by IP address. Dynamic DNS allows you to use a domain name (which does not change) to locate a device with a Dynamic IP address. There are companies on the Internet which can provide you with a DNS Address, even if your IP address changes. For example www.dyndns.org or hn.org or www.no-ip.com. You should consult with them about how to use their service.
When a typical PC connects to the Internet through a broadband, dialup or other connection it is often assigned a random IP address (usually through a process called DHCP). The problem with a random IP address is that other Internet users don’t know your new address each time you connect. Thus, users can’t easily locate your PC when you run BadBlue or any other type of server. Dynamic DNS helps solve the problem. Some servers (like BadBlue) include DNS software that determines when the PC’s address has changed and sends the change to a master DNS server. For example, BadBlue supports a naming service called DynDNS.org. You can sign up for a free dynamic DNS account such as jsmith.dyndns.org. This will allow you to distribute a DNS name that your users can type in to their browsers’ address bar (http://jsmith.dyndns.org) rather than an IP address which can change frequently.
