[dns-operations] about the underline in hostname

Randy Bush randy at psg.com
Thu May 29 12:34:16 UTC 2014

> I found this is a valid RR:
> _spf.yandex.ru.         2768    IN      TXT     "v=spf1
> include:_spf-ipv4.yandex.ru include:_spf-ipv6.yandex.ru ~all"
> But for A, CNAME, AAAA etc, the underline in hostname is invalid.
> Does this make a confusion?

no.  next question.


More information about the dns-operations mailing list