UDP Port Problem

ok im having sum Trouble with the UDP port like when

i Put in 27015 an i click start server the server comes up and in the ip adress it says ...**:27016

an it doesent apper in the internet when u search in server itss only in Lan so how do i fix this? i want it to

stay 27015

By The Way the ***s are my ip address

Then forward both ports. No problem.

i did that but it still dosent work my server still appers on lan


what does it mean when ur server appers on both lan an internet?

can people still join your game?