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Re:Microsoft Teams outage due to expired certificate by omh on Monday February 03, 2020 @02:19PM (#22227864)
That's a great start.

But in a non-technical organisation, who should those messages go to?

Often the initial LetsEncrypt setup will be handled, correctly, by some IT staff. Then it might break several months or years later for some odd reason.

The organisational challenge is to get the message through to someone who understands it and will act on it.

Re:Microsoft Teams outage due to expired certificate by ryandrake on Monday February 03, 2020 @02:48PM (#22228193)
Yes, and: fix bugs so the setup doesn’t break. I’m constantly babysitting LetsEncrypt. It’s always failing in some stupid way, and all it can go is Email me with: “Ive been silently failing for the last couple of months and now your certificate is going to expire if you don’t drop everything and comb through my logs now LOL!”

This time the problem was LE all of a sudden decided to start storing my certificate in a directory called mydomain.com-0001 instead of mydomain.com, breaking the rest of the setup that relies on things being in the right directory. Automation is only useful when the software behaves predictably and consistently.

Re:Microsoft Teams outage due to expired certificate by somehnguy on Monday February 03, 2020 @03:15PM (#22228481)
Comforting to know I'm not the only one who constantly has random problems with Let's Encrypt. You're on point about the silently failing bit too.
Re:Microsoft Teams outage due to expired certificate by omh on Monday February 03, 2020 @04:01PM (#22229041)
LetsEncrypt issues for 3 months by default and then tries to renew after 2 months.

So if renewal fails you should have ~30 days to fix it.

But this does work best if your tools try the 2-month renewal. (I'm looking at you, wpengine!)

Re:Microsoft Teams outage due to expired certificate by daxelrod on Monday February 03, 2020 @04:04PM (#22229065)
Which client are you using? Certbot?
Re:Microsoft Teams outage due to expired certificate by outworlder on Monday February 03, 2020 @02:45PM (#22228150)
> The organisational challenge is to get the message through to someone who understands it and will act on it.

Yes, and to keep a very infrequently used channel working and up-to-date.

Re:Microsoft Teams outage due to expired certificate by brongondwana on Monday February 03, 2020 @03:43PM (#22228798)
This is why letsencrypt very sensibly creates short-lived certificates, meaning that the channel is not infrequently used.
Re:Microsoft Teams outage due to expired certificate by inimino on Monday February 03, 2020 @03:45PM (#22228839)
The channel only needs to be used when the automated process breaks.
Re:Microsoft Teams outage due to expired certificate by brongondwana on Monday February 03, 2020 @04:05PM (#22229075)
Oh right - yeah, that sucks. Rarely used processes often break.

Hence efforts like https://tools.ietf.org/html/rfc8701 - designed to make sure extensibility options don't get messed up.