DDNS input

Hi 

Have the Nighthawk RAX200 and am trying to work out how to complete the DDNS fields to enable the DDNS. Trying to use the Dyndns settings but do not understand the netgear requirements to make it it work.

Host Name:

Username:

Password:

First, what is the host name and where do I find it? The email sent from Dynddns gives a 'create url', is this it?

Second, Which user name and password do I use. Is it the one for the modem, the one for logging on to Netgear, my email login or what?

Sorry but I am completely ignorant on these things...

Neon....