Forwarding Ports/Dynamic DynDNS Configure

[JelvisChan]

Okay, I have a question about forwarding Port 80 TCP.

I successfully forwarded port 80 to my IP Address, but I'm not sure whether this IP has to be the one in your computer - in my case 192.168.2.22, or the automatically detected IP from DynDNS, which I'm using to host my local computer - 87.177.87.11.

I made a host name on DynDNS call: http://jelvis.dyndns.org
Also, I went to Dynamic DNS configuration in my router configuration, and it asked me for my Domain Name - is this jelvis, jelvis.dydns, or what?

I gave me a list of options:

dydns.org
no-IP.net
etc.

I chose dydns.org, which I think is right.
It then asked me for my username...is this the username that I use for the DynDNS Website, along with my password?

I order to configure a Dynamic DNS host, do I have to pay for a domain?

I don't understand...partly because all of the language on my router configuration is in German.

I attached a screenshot of what I've been doing, and please fill free to help me out with the text fields:

[iMerlin]

Hey Jelvis, you ever get this working? Im trying to set up the same thing and not having much luck. I did a search and stumbled onto your post here.