Host name format

[Barry Margolin]

In article <38716123.C9ADCCD0 at mailcity.com>,
Ashwin  <k.ashwin at mailcity.com> wrote:
>Hi All,
>    Can anyone let me know if "_" (underscore) in an hostname is valid
>or not? I am not able to fine the right rfc that would give me the
>naming conventions. I checked up in rfcs #1034 and #1035. They do talk
>about domain naming conventions but am not sure if it would apply for
>naming hosts too.

RFC 952, as amended by RFC 1123 section 2.1, specifies the syntax of host
names.  The allowable characters are letters, digits, hyphen, and dot (only
to separate domain labels).  The first and last characters must be letters
or digits.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
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