German Shorthair questions

Define "will not go to a kennel"

is this an indoor plastic crate or a outside metal kennel? When you say will not go to a kennel, do you mean he will not enter it on his own? How old is the dog? Do you have any history on the dog?

These questions will help with what your next step is

I trained mine (but I had him from a pup) to go to a crate by feeding him in it. If he doesn't want to go in, he's going to be hungry. But I also leave it open and never use it as a punishment. Its his safe spot. He has chew toys, a blanket, and his food and water in there.
As far as barking when the doorbell rings? Let me know, although I like dogs to bark when strangers come around.