you might want to check out a nbt enumeration utility to see if you're broadcasting allowing for sensitive information leaks. i would suggest nbtdump from @stake:

http://www.atstake.com/research/tools/index.html

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if you're wanting to scan the entire network for similar vulnerabilities, then it might be easier to use something equivalent to my own nbtdig:

http://droby10.addr.com/utility/nbtdig/
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