nanog mailing list archives
Re: ns1-proddns.glbdns.o365filtering.com unreachable?
From: Stephane Bortzmeyer <bortzmeyer () nic fr>
Date: Wed, 6 Jul 2022 11:49:23 +0200
On Wed, Jul 06, 2022 at 11:37:40AM +0200, Bjoern Franke via NANOG <nanog () nanog org> wrote a message of 10 lines which said:
<tenant>.mail.protection.outlook.com seems to throw servfails.
The authoritative name servers for this domain do not handle EDNS (which was specified only 23 years ago) so the resolvers that do not fallback on EDNS (probably the majority) return a SERVFAIL. Seen with RIPE Atlas probes: % blaeu-resolve -r 500 --type NS mail.protection.outlook.com [ns1-proddns.glbdns.o365filtering.com. ns2-proddns.glbdns.o365filtering.com.] : 319 occurrences [ERROR: SERVFAIL] : 138 occurrences [] : 1 occurrences Test #42222155 done at 2022-07-06T09:24:50Z
Current thread:
- ns1-proddns.glbdns.o365filtering.com unreachable? Thomas Mieslinger (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Bjoern Franke via NANOG (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Stephane Bortzmeyer (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Peter van Dijk (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Stephane Bortzmeyer (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Stephane Bortzmeyer (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Bjoern Franke via NANOG (Jul 06)
- Re: ns1-proddns.glbdns.o365filtering.com unreachable? Cas de Reuver (Jul 06)