"-" and "_" in domain name

[Joseph S D Yao]

Bottom line:

DNS, per all the RFCs, allows any character.

BIND used to disallow some characters, but now allows all characters,
IIRC.

The "-" character is always acceptable in host names and other domain
names.

The "_" character may not be used in host names, and I believe is
therefore deprecated - at least by some - in "real" domain names.
Microsoft, of course, decided to use them in some of its proprietary
stuff.  I guess that's redundant.

-- 
Joe Yao				jsdy at center.osis.gov - Joseph S. D. Yao
OSIS Center Systems Support					EMT-B
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