[HECnet] All gone silent

Johnny, It uses your local resolver and what it does is another story, try this: root at Homer1:/home/roll# dig @185.70.40.19 mail.protonmail.ch ; <<>> DiG 9.9.5-3ubuntu0.19-Ubuntu <<>> @185.70.40.19 mail.protonmail.ch ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43785 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 4 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;mail.protonmail.ch. IN A ;; ANSWER SECTION: mail.protonmail.ch. 1200 IN A 185.70.41.101 ;; AUTHORITY SECTION: protonmail.ch. 1200 IN NS ns2.protonmail.ch. protonmail.ch. 1200 IN NS ns1.protonmail.ch. protonmail.ch. 1200 IN NS ns7.protonmail.ch. ;; ADDITIONAL SECTION: ns1.protonmail.ch. 1200 IN A 185.70.40.19 ns2.protonmail.ch. 1200 IN A 185.70.41.19 ns7.protonmail.ch. 1200 IN A 3.127.12.149 ;; Query time: 370 msec ;; SERVER: 185.70.40.19#53(185.70.40.19) ;; WHEN: Mon Aug 16 18:46:31 PDT 2021 ;; MSG SIZE rcvd: 165 ----- Original Message ----- > GW:/home/bqt> dig mail.protonmail.ch > > ; <<>> DiG 9.10.5-P1 <<>> mail.protonmail.ch > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 48613 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1 > > ;; OPT PSEUDOSECTION: > ; EDNS: version: 0, flags:; udp: 4096 > ;; QUESTION SECTION: > ;mail.protonmail.ch. IN A > > ;; Query time: 871 msec > ;; SERVER: 127.0.0.1#53(127.0.0.1) > ;; WHEN: Tue Aug 17 03:41:27 CEST 2021 > ;; MSG SIZE rcvd: 47 > > > Too late in the evening for me to even try figure out what I am seeing. > But maybe you can spot it... > > Johnny > > On 2021-08-17 03:40, Peter Lothberg wrote: >> (If "DIG" was used to produce output's this would be easier to debug...) >> >> Here i my 5-cents, >> >> DNS servers/DNS revolvers do nowadays not respond if the indirect bit is set >> in a query. This might be the thing we are seeing? >> >> -P >> >> >> ----- Original Message ----- >>> From: "bqt" <bqt at softjar.se> >>> To: "hecnet" <hecnet at Update.UU.SE> >>> Sent: Monday, August 16, 2021 9:34:20 PM >>> Subject: Re: [HECnet] All gone silent >> >>> On 2021-08-17 03:04, Paul Koning wrote: >>>> >>>> >>>>> On Aug 16, 2021, at 6:36 PM, Mark <mwjr at protonmail.com> wrote: >>>>> >>>>> Mystery solved (or at least the mystery of no response) - I used to have some >>>>> issues when I ran authoratitive DNS and mail directly from our school's IP >>>>> addresses rather than an 'established' (big tech co) source >>>> >>>> Why would that explain the failure to answer DNS queries? DNS servers are >>>> supposed to answer queries from everyone. I've never heard of failing to do >>>> so. FWIW, I just tried asking ns1.protonmail.ch about mail.protonmail.ch, and >>>> it was happy to answer me (to my random Comcast client addresses, IPv4 and IPv6 >>>> both work). >>> >>> I think the comment should be read as "that explains the failure of the >>> mail being delivered". >>> >>> Why the DNS queries are blocked from my mail server remains a mystery, >>> but it is a fact that they are. >>> >>> I could/should update that machine, in case there is something in my >>> whole setup that is a reason, but right now I can't really understand >>> what that would be... >>> >>> If I explicitly give the IP address of ns1.protonmail.ch as the name >>> server, I do get a response. Not sure if it might in the end be some >>> other name server that is refusing me, and I don't really feel like >>> trying to figure out where things are going wrong right now. >>> But maybe updating my system will help. We'll see. Something I'll try in >>> the next day or two. >>> >>> Johnny >>> >>> -- >>> Johnny Billquist || "I'm on a bus >>> || on a psychedelic trip >>> email: bqt at softjar.se || Reading murder books >>> pdp is alive! || tryin' to stay hip" - B. Idol > > -- > Johnny Billquist || "I'm on a bus > || on a psychedelic trip > email: bqt at softjar.se || Reading murder books > pdp is alive! || tryin' to stay hip" - B. Idol