[HECnet] All gone silent

[Peter Lothberg]

(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