problem with redirecting

I have something like this myhost.dyndns.org. When I put myhost.dyndns.org in browser then redirect me to ADSL modem IP (10.0.0.138) but I try to redirect me on localhost (Apache server). How to solve this

From serverfault Ognjen

• You must set a port forward on your router/modem at least for port 80 to the (local) IP for your server.

  Beware, this can be dangerous as anyone can access this website in your private network.

  Ognjen : How to do this? You mean set NAPT?

  SvenW : Depending on your setup, something like NAPT might be available for you. In most cases though, you will have to look for something called port forward or a variant thereof. Actually, NAPT is a combination of normal NAT and port forwarding, if I remember this correctly.

  Grizly : Check out http://portforward.com/
  From SvenW