A weird thing I noticed about Microsoft in the past is that occasionally it will think you are on a class B network even if your address space ic clearly class C. I had that problem with an ISP I did consulting for, they were assigned the 209.25.255.0 network (I might be wrong about the second octet). We noticed heavy traffic coming in on their t1, so heavy infact that the poor cisco 3000 could barely handle commands from a terminal. It turns out that several networks were misconfigured and sending their broadcast traffic to us, we promptly called the upstream and asked for a new /24. I know it's sort of off topic for the port 137-139 discussion, but I thought some of you guys would be interested. Regards, James Stephens James@iperform.net Network Administrator 714-254-0200 Internet Performance Fax: 714-254-0600