Dynamic DNS or DDNS is a method of updating, in real time, a DNS to point to a changing IP address on the Internet. This is used to provide a persistent domain name for a resource that may change location on the network.
Many routers have built in DDNS Services but can be limited in the services which they update. If the Router supports a the service, or you are willing to pay or donate for a service, you should do this, it is faster and more reliable. In that case, there is no need to use a softwareside solution.
Software Dynamic DNS
FreeDNS.afraid.org is a free Service which is easy and uncomplicated to set up.
Another option is to:
- goto Dynamic DNS page on freedns.afraid.org
- add A record and select your prefered domain name
- copy link under Direct URL, it will be something like "http://freedns.afraid.org/dynamic/update.php?ZRRJZ...................bzo4Njc1M4DA"
- use crontab -e to enter new schedulled command:
*/10 * * * * curl -ks http://freedns.afraid.org/dynamic/update.php?ZRRJZ...................bzo4Njc1M4DA > /dev/null
DynDNS is another Dynamic DNS service.