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.