enforcing ssl for entire application : ssl redirection

HI, 

using the following code : it redirects to  a different port rather than the hosted one. 

config.Filters.Add(new RequireHttpsAttribute());

my intention is to  enfoce ssl and the purpose is served but it redirects to new port : ssl is generally hosted on 443 however, 

i would need more clarity on this #aspnetcore  

can  some one explain how do i enforce ssl to same port or the better way of enforcing ssl from startup class ?