[kwlug-disc] ISRG Root X1 week (well, DST ROOT CA X3 expiration)

[Mikalai Birukou]

I am hoping you are having a peaceful closure of this ISRG Root X1 week.

https://letsencrypt.org/docs/dst-root-ca-x3-expiration-september-2021/

This transition, giving the scale of Let'sEncrypt actual use is probably 
going fine. Satellites are not falling from the sky (Oh, thank inertia 
for that? oka-ay).

I want to thank Paul for bringing up our BBB server for our Monday 
meeting. And may be spread found info 
https://github.com/bigbluebutton/greenlight/issues/2927

I have a suspicion that many services are down because of nuances. And 
issues may have, old ubuntu 16, without new certificate, or an expired 
certificate's failure is not letting libs to use new cert. Certbot 
flag   --preferred-chain is a news to me, while I knew from history that 
Let'sEncrypt relied on several chains for introduction.