I had some1 set up my dlink so i dont know what my

you need to manually reset the router to its factory settings. To do this, look at the rear part of the router and look for a very small whole with a small pin inside. press that pin down using a stick for 30 seconds to reset. resetting means losing all info and settings so make sure you have the IP configurations of your ISP but you can call your ISP to get these. And when reset, the username is admin and the password is blank OR try the reverse: username is blank and password is admin. You can try it now without resetting maybe the technician left the default settings unchanged

For that connect your router to computer with ethernet cable.
Then you can access it with following link.
http://192.168.1.1
or
http://192.168.0.1
type user as "admin" or blank or "password"
Then you can see configuration page of router then if you want topen port click on port forwarding or NAT.
Then change as you want.
then save and restart router to take effect.
.
Let me know if you need further assistance.
thanks.