Cisco IOS versions 12.4 and later have the capability to directly update your No-IP hostname using a built-in DDNS client. If you have a Cisco router with the latest firmware, this support is already built into it. We offer these examples below for informational purposes only and recommend that router configuration changes be made by qualified personnel to minimize the risk of losing Internet connectivity or causing other damage to the router.
Note: Cisco maintains instructions on configuring IOS for DDNS updates. Please consult this link before proceeding.
5. ddns [both]
8. add url
9. remove url