>I think Evan was proposing that home-ipv6-customer.isp.net would also exist, >so a PTR check that looked for >*existence* would succeed, but one that looked for *matching* would fail for >most of those addresses. > >Do we know whether typical PTR checks look for existence or matching?
The ones I know all look for matching. It's too easy for a malicious or negligent provider (typically in eastern Europe or Asia) to stick in PTRs like mail.google.com. R's, John _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
