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Re: Reverse Hostnames with '_msdcs' not valid

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  • Bastian Blank
    ... This is invalid. A label may not include the underline character. ... [RFC 1034] The only exceptions are specified in other RFC, like the SRV record and
    Message 1 of 11 , Aug 30, 2012
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      On Wed, Aug 29, 2012 at 01:01:52PM +0200, Bernhard Schmidt wrote:
      > ok: 134.130.87.26 -PTR-> domaindnszones.geotechnik.rwth-aachen.de
      > -A-> 134.130.87.26
      > ok: -PTR-> forestdnszones.geotechnik.rwth-aachen.de
      > -A-> 134.130.87.26
      > ok: -PTR-> gc._msdcs.geotechnik.rwth-aachen.de

      This is invalid. A label may not include the underline character.

      | <domain> ::= <subdomain> | " "
      | <subdomain> ::= <label> | <subdomain> "." <label>
      | <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
      | <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
      | <let-dig-hyp> ::= <let-dig> | "-"
      | <let-dig> ::= <letter> | <digit>
      | <letter> ::= any one of the 52 alphabetic characters A through Z in
      | upper case and a through z in lower case
      | <digit> ::= any one of the ten digits 0 through 9
      [RFC 1034]

      The only exceptions are specified in other RFC, like the SRV record and
      for the future TLS-certificates.

      Bastian

      --
      Our way is peace.
      -- Septimus, the Son Worshiper, "Bread and Circuses",
      stardate 4040.7.
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