Archive for January 7, 2009

Cisco IOS Dynamic DNS

I recently decided to configure dynamic DNS on my Cisco router at home. Lately, my ISP has been giving me issues causing my IP address to change quite often. Since I don’t pay for a static IP, I use dynamic DNS services to map my IP to a DNS name.

I use a free service from dyndns, which lets you pick a domain name to link to your IP. This is most useful for those of us hosting some minor applications behind our routers and we want to connect via a DNS name vs. an IP address that can change.

I usually just go to the website when my IP address changes, but I decided I wanted to let my router do the updating for me.

See sample config below ::

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