How to teach "No Bark"

[T.D.'s MOM]

How do you teach the "no bark" command?? TD will sometimes sit at the window and bark at someone walking by. Now if it is late at night and someone is walking in our yard, I want him to bark. But when I know that it is okay, how do I tell him that? He doesn't do it everytime someone goes by, but I guess when it's someone he hasn't seen before he barks. I tell him No Bark, and during the 2-3 seconds when he IS quiet I tell him good boy. But then he continues barking. I think he thinks I am telling him good boy for barking instead of being quiet http://www.rottweiler.net/rottie/mad.gif I have tried getting his attention with a toy or something which works for that time. Any suggestions??
Also, this part should probably go to behavior, but it fits in here too. We had a service man at our house, so I put TD in his kennel because not everyone loves dogs like I do http://www.rottweiler.net/rottie/biggrin.gif So, he came in the house and asked right away if we had a dog and asked if it was in our back yard. I told him he was kenneled and he said good. I don't know if TD just sensed that he didn't like dogs or was scared, but he started barking and growling at him. Of course he asked what kind of dog it was, and I told him (which I didn't want to do at that point since he'll probably go tell all his friends about this mean Rott he saw today, blah blah blah) Anyway, I firmly told TD, NO BARK, which was like talking to the wall. Finally, I told him THAT'S ENOUGH very firm at his face through the kennel door and he stopped, then I told him good boy. Maybe since THAT'S ENOUGH worked, maybe I should work on teaching that as "shut up, its okay" instead of NO BARK. I hope this is all making sense. So, my question is, how do I teach a no bark command.
Thanks in advance.
Jennifer & TD

[rottmommie]

I AM NOT SURE I AM RIGHT BY ANY MEANS, BUT MY TRAINER TOLD ME NOT TO DISCOURAGE THE ALERT TYPE OF BARKING, LIKE WHEN SOMEONE COMES NEAR THE HOUSE, DOOR DOORBELL ETC. I AM TO TELL HIM GOOD BOY!!! HE SAYS I WANT THE DOG TO ALERT ME THAT SOMEONE IS THERE, AND IF I TELL HIM TO SHUT UP, I WILL BE PISSED IF SOMEONE BREAKS INTO MY CAR AND THE DOG DOESNT BARK. I GUESS THERE IS A OPINT THAT YIOU WANT THE DOG TO 'turn off" though. I GUESS I WILLL ASK ABOUT THAT NEXT SESSION!!!