On Thursday 29 May 2014 00:24, hua peng wrote: > 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"
The general geist... feng shui... the way it hangs... (how many languages can I offend?): ANY OCTET is legal in a label. HOWEVER, because of concerns regarding hostnames I can't, for instance, register "rm -rf *.com". (*cough* Khazakhstan) BUT if I own m3047.com (and I do!) I *could* (but don't!) serve any RR I so desire under that domain. (Regarding all numbers, I own 2535385091.org... it's my phone number.) And I reserve the right to serve anything I want under m3047.com. For legal purposes. (Which reminds me, but that's another post.) There is also some confusion about the notion of "domain". A domain, as far as the DNS is concerned, is a concatenated list of labels, served from a known root. No, no, no I'm wrong. A domain is a ermmm Domain that someone can buy! How forgetful of me! What I'm getting at is that when they wrote this stuff they were mathematicians, and a "domain" had to do with where knowledge was present (hence NXDOMAIN vs ANSWER:0). So especially when you read old RFCs, keep that in mind. > But for A, CNAME, AAAA etc, the underline in hostname is invalid. > Does this make a confusion? That seems like an error on the side of overly restrictive. Are you certain? Are you really sure that the DNS is what is obstreperously impeding your happy path? -- Fred Morris _______________________________________________ dns-operations mailing list dns-operations@lists.dns-oarc.net https://lists.dns-oarc.net/mailman/listinfo/dns-operations dns-jobs mailing list https://lists.dns-oarc.net/mailman/listinfo/dns-jobs
