In message <c059877d829f76429f49e0b48705d888ddd21...@exch-01.corp.cira.ca>, Jacques Latour writes: > Hi, > > Sent something relating to this on DNS-OARC this morning, but it seems to > be legit to have delegation for a _tcp.example.ca, which fails the syntax > requirements defined in section 8.1. Illegal characters MUST NOT be in > the domain name". > > A delegation can happen to a valid domain name, not necessarily a valid > hostname. > > Zonemaster fails on delegations like _sips._tcp.cam.ac.uk > > # dig _sips._tcp.cam.ac.uk ns +short > rnb-uls2-jabber.phone.cam.ac.uk. > cnh-uls2-jabber.phone.cam.ac.uk. > wolf-uls2-jabber.phone.cam.ac.uk. > > Jack
There are rules for TLDs which are tighter than the general DNS requirements. I can remember when COM was looking at what names to allow in delegations and I said something along the lines of you can allow anything but if you allow something other than LDH then the person requesting the delegation needs to know that they can't use it for hostnames. After that the COM delegation rules got tightened down to just LDH and some delegations got removed. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
