NO-IP DDNS on Cisco Router

[javentre]

FWIW:  I have found the DDNS code in IOS to be very buggy.  Things like changing the interval/frequency or URL doesn't always work.  Even removing the command and putting it back in hasn't resolved issues.  It usually took a reload.

[Ironman]

Yup, exactly what I noticed. Even though the old config and URL were gone from the config it was still showing up in a debug. I even completely removed the ddns config all together and yet I STILL saw it trying in the debug. A reload cleared it up.

[Reggle]

By the way, I've been using No-IP for the last two years and it really gets on my nerve to confirm the hostnames every two weeks.
Been looking into an alternative and will be trying these ones soon: FreeDNS.afraid.org

I'm using hopper.pw
It supports both IPv4 and IPv6, and updating is a single HTTP GET url where it will take the update source as IP address if you want. No mail confirmations.
It's community funded though, and my uptime of the DNS record has not been 100% lately.