This draft RFC expired 13 years ago. The corresponding modern standard is, as ivanr correctly points out, DNS SVCB and HTTPS records: https://www.ietf.org/a

This draft RFC expired 13 years ago. The corresponding modern standard is, as ivanr correctly points out, DNS SVCB and HTTPS records: https://www.ietf.org/archive/id/draft-ietf-dnsop-svcb-https-11.html https://www.ietf.org/archive/id/draft-ietf-dnsop-svcb-https-...