The solution: SRV RR
First defined in experimental RFC 2052
- (like a more general form of MX).
Obsoleted by RFC 2782
- It describes a DNS RR which specifies the location of the server(s) for a specific protocol and domain.
Supported from BIND 4.9.5 upwards
- Caveat BIND 8.2 8.2.2 p6