>Has there been any effort to standardize or register the "special" >subdomains, e.g. something like *well-known*.domain.com? Having seen large >companies fail to secure the abuse@, webmaster@, security@, and other local >parts that allow "proving" domain ownership, I'm not as sanguine that >tumblr and dyndns (and wix and squarespace and wordpress and ..) will >remember to block off all the pertinent subdomains in advance.
Dave Crocker is working on a registry of special tags like _dmarc but they all contain underscores so they're not hostnames. ICANN has some rules about second-level hostnames in contracted TLDs, but they're not very relevant here. There's a somnolent WG called DBOUND whose goal is to publish boundaries in the DNS, perhaps along the lines of the Mozilla PSL, but it's going nowhere. So the answer is no, and that's why I expect there'd be a lot of heartburn if we wrote a spec that used a fixed label in a hostname, since as far as I can tell nobody's done that before. The IETF way to look up a hostname for a service is to use DNS SRV, and it's widely used. For example, approximately 100% of SIP providers use it. it works fine. R's, John _______________________________________________ Uta mailing list [email protected] https://www.ietf.org/mailman/listinfo/uta
