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valid chars in host names
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David Borman
Nov 22, 1993, 5:48:39 PM11/22/93
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According to RFC-1123/RFC-952, the only valid characters in a
host name are alpha-numerics and a hyphen. Has anything relaxed
those rules since then to allow other characters (like and
underscore)?
-David Borman, d...@cray.com
John C Klensin
Nov 22, 1993, 9:59:12 PM11/22/93
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>According to RFC-1123/RFC-952, the only valid characters in a
>host name are alpha-numerics and a hyphen. Has anything relaxed
>those rules since then to allow other characters (like and
>underscore)?
>host name are alpha-numerics and a hyphen. Has anything relaxed
>those rules since then to allow other characters (like and
>underscore)?
David,
If my memory is correct, the "no underscores" part of the restriction
predates the DNS and is due mainly to human factors reasons: you permit
two inter-word separators, and people can't remember which one to use
and get to be driven crazy by getting that wrong. Absent really
compelling reasons, the rule should probably continue to stand.
And, to answer your precise question, "nope, not yet as far as I know".
john
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