someone once told me to fill an empty soda can with coins or something that will make loud noise
tape the can shut
then toss it (Near, not AT) your dog whenever they bark
this should train the bad behvaior out of them

good luck

Never hurt the dog to get what you want!!!!!!
When the doorbell rings, get the dog to sit, and stay. Don’t open the door until she does. If she gets up while you are opening the door, shut the door, and get her to sit again…. Keep doing until she gets it. When it works give her a calm pet and praise (not to excite her) and a small treat. Tell the person to give a pet, but not to much attention!!
Good luck
if you have any more Q.’s…..

I have a barker too and she is also a puller on the leash
Mine is 10 months old and I am still trying to train her the best I can. I recently used someone elses idea and got a season of the Dog Whisperer from blockbuster. Boo me if you must. I have seen all of the Its Me or the Dog shows so I thought I would give Cesar Millan a try. He gives good tips I watched it yesterday and even today on our walk I was able to keep her from pulling…part of the time. You can give it a whirl. There were also episodes about compulsive barkers. It may help and Good Luck.
What type of dog she and how old?

buy a muzzle or batton