How do i open port 21 on my router

hi everyone

i was wondering does anyone knows how to open port 21 on their router

i need help opening port 21

My router is DL-524

 

You need to get in to your routers settings by typing your routers ip address in your browsers address bar.

 

Depending on your Revison you can get to the product manuals and FAQs here... http://support.dlink.com/products/revision.asp

 

i can get in my router but i dont no were to go

 

just DL-524 revison is A1

 

Port 21

http://support.dlink.com/faq/view.asp?prod_id=1341