On 06/11/2018 20:44, Tony Finch wrote:
My understanding is that wildcards don't work for SRV because the _prefixes are used to disambiguate which service you are asking for, effectively to extend the RR TYPE number space. So if you wildcard a SRV record then the target port has to support every possible protocol :-)
No, it's because you can't do: _http._tcp.*.example.com IN SRV ...
If you are using an _prefix without any meaning of its own but only to move a record away from the apex (so that it can be delegated or CNAMEd) and also using a specific RR type or an RDATA prefix, then wildcards do not conflict.
I believe they still do, e.g. _domainkey.*.example.com IN TXT ... Ray _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
