Hi,
This is a question to the mail administrator. What happened on Friday Oct. 9th
of this year on the Internet? Now I don't want you to overly worry because I'm
just going through my logs and there is a small story to tell, and besides it
could have happened on the Internet and had no relation to openbsd's network.
The story is, that I log time to lives (TTL) with a setsockopt() on my logging
DNS server. Whenever mail.openbsd.org sends a mail it does not ask its cache
but does a dns query every time. This is a great beacon on the Internet (at
least for me) it tells something of the dedication openbsd has for delivering
the mail from the mailing lists.
I did a bit of analysing of my logs and found this:
$ grep 199.185.178.25 /var/log/delphinusdnsd | awk '{print $1 " " " " $14; }' |
sort -u | tr '\n' ' ' && echo
Dec (ttl=48, Dec (ttl=49, Dec (ttl=50, Nov (ttl=48, Nov (ttl=49, Nov
(ttl=50, Oct (ttl=43, Oct (ttl=48, Oct (ttl=49, Oct (ttl=50, Sep (ttl=48,
Sep (ttl=49, Sep (ttl=50,
As you can see the TTL's are 48, 49, and 50 when they reach my network. Except
October 9, here the TTL has a 43 with it. Here is a sample log:
Oct 9 03:19:44 parallax delphinusdnsd[29829]: request on descriptor 10 interfac
e "168.119.124.130" from 199.185.178.25 (ttl=43, region=1, tta=0.453ms) for "mai
l.centroid.eu." type=A(1) class=1, edns0, dnssecok, answering "mail.centroid.eu.
" (45/168)
It was early in the morning for me, I missed it completely because I don't
systematically search my logs. Only when I'm bored do I look through this.
The hop count increased by 5 hops, it could have been a BGP blip perhaps?
Perhaps it was maintenance on my providers network who knows, I don't know.
All I know is that according to my logs it was between 3:19:43 and 3:19:45
CEST timezone on that day, I queried both my auth nameservers for this.
Could it have been another operator on the Internet rerouting something? I
searched a little in the openbsd archives there was no maintenance announced,
it was a boring Thursday/Friday night, roughly nine days before 6.8 release
time.
Maybe it was just a network blip. But maybe OpenBSD sysadmins saw something?
Other than this funny mail, I want to wish everyone a happy solstice tomorrow,
I wish you seasons greetings and merry christmas and happy new year 2021!
Stay healthy before we beat this global pandemic!
Best Regards,
-peter
