This isn't just old devices either, my Android phone is running near enough to the latest release and this broke my radius auth against a Lets encrypt cert.
I had to manually edit the CA to remove the final root cert, which Lets Encrypt are still including via the renewal tool I'm using. I knew it was coming, but didn't expect it to cause this problem.... ________________________________ From: AusNOG <[email protected]> on behalf of Luke Thompson <[email protected]> Sent: Friday, 1 October 2021 12:44:44 PM To: Lachlan Gilmour; Mark Andrews Cc: [email protected] Subject: Re: [AusNOG] Global DNS yuck? cPanel also failed to plan for the expiry, so we're seeing workarounds then revocations (oops, that didn't work - etc). Still no real headway after 12~ hours. The root cert expiry was a long time coming, though if you check Twitter it seems like it's caught many out. Cheers, Luke Thompson Operations Manager On 1/10/21 12:40 pm, Lachlan Gilmour wrote: I believe it is related to the Lets Encrypt root cert that expired overnight. I've seen quite a few older devices today having issues accessing sites using lets encrypt certs. More info on the issue can be found here: https://docs.certifytheweb.com/docs/kb/kb-202109-letsencrypt/<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZhMDU5Mjk2ZGMwY2FkNGNjYz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiYyZjk4NjkwOGJlM2E1YTI9MTMzMyYmdXJsPWh0dHBzJTNBJTJGJTJGZG9jcyUyRWNlcnRpZnl0aGV3ZWIlMkVjb20lMkZkb2NzJTJGa2IlMkZrYi0yMDIxMDktbGV0c2VuY3J5cHQlMkY=> On Fri, Oct 1, 2021 at 12:36 PM Mark Andrews <[email protected]<mailto:[email protected]>> wrote: More correctly they had working DNSSEC deployed (https://dnsviz.net/d/slack.com/YVXX_g/dnssec/<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiMTQ0NjA3MDliZDFkZGRhYz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiY0ZjA4NjkwOGJlM2E1OWY9MTMzMyYmdXJsPWh0dHBzJTNBJTJGJTJGZG5zdml6JTJFbmV0JTJGZCUyRnNsYWNrJTJFY29tJTJGWVZYWCU1RmclMkZkbnNzZWMlMkY=>) and then pulled both the DS records for slack.com<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NDhlOGQ5ZWM4Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZiZmFjYjk4Y2FlZGU1YWI9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZzbGFjayUyRWNvbQ==> and the DNSSEC records in slack.com<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NDhlOGQ5ZWM4Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZiZmFjYjk4Y2FlZGU1YWI9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZzbGFjayUyRWNvbQ==> AT THE SAME TIME resulting in DNSSEC validation failures. Cached DS records said slack.com<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NDhlOGQ5ZWM4Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZiZmFjYjk4Y2FlZGU1YWI9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZzbGFjayUyRWNvbQ==> is signed but the answers from the slack.com<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NDhlOGQ5ZWM4Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZiZmFjYjk4Y2FlZGU1YWI9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZzbGFjayUyRWNvbQ==> servers where missing the DNSSEC records. They failed to wait for the DS records to expire from DNS caches before removing the DNSSEC records in slack.com<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NDhlOGQ5ZWM4Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZiZmFjYjk4Y2FlZGU1YWI9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZzbGFjayUyRWNvbQ==>. Failure to wait for unsigned responses to clear caches before publishing DS records can also cause issues with multiple levels of caching. > On 1 Oct 2021, at 08:23, Scott Howard > <[email protected]<mailto:[email protected]>> wrote: > > They broke (and subsequently fixed) their DNSSEC configuration many hours > ago, but it was broken long enough to get cached by some servers for up to 24 > hours so some users are still having issues connecting. > > Short of the classic "have your ISP clear their DNS cache" not much anyone > can do except wait it out... > > https://status.slack.com/2021-09/06c1e17de93e7dc2<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiODUxMmM3ZjlhYzFkZWQ2OD02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiY4YTk5OGMxZDVhM2JhZmY9MTMzMyYmdXJsPWh0dHBzJTNBJTJGJTJGc3RhdHVzJTJFc2xhY2slMkVjb20lMkYyMDIxLTA5JTJGMDZjMWUxN2RlOTNlN2RjMg==> > > Scott > > > On Thu, Sep 30, 2021 at 3:19 PM Andrew Yager > <[email protected]<mailto:[email protected]>> wrote: > Hi, > > Slack is down and finding a few other (non slack) services etc being broken > seemingly with DNS things. Anyone know what’s going on? > > A > _______________________________________________ > AusNOG mailing list > [email protected]<mailto:[email protected]> > http://lists.ausnog.net/mailman/listinfo/ausnog<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYTVmMjgzYWRhYzdjNTk0Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZhZmFjMTlmODllZmU0ZTk9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZsaXN0cyUyRWF1c25vZyUyRW5ldCUyRm1haWxtYW4lMkZsaXN0aW5mbyUyRmF1c25vZw==> > _______________________________________________ > AusNOG mailing list > [email protected]<mailto:[email protected]> > http://lists.ausnog.net/mailman/listinfo/ausnog<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYTVmMjgzYWRhYzdjNTk0Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZhZmFjMTlmODllZmU0ZTk9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZsaXN0cyUyRWF1c25vZyUyRW5ldCUyRm1haWxtYW4lMkZsaXN0aW5mbyUyRmF1c25vZw==> -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected]<mailto:[email protected]> _______________________________________________ AusNOG mailing list [email protected]<mailto:[email protected]> http://lists.ausnog.net/mailman/listinfo/ausnog<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYTVmMjgzYWRhYzdjNTk0Yz02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiZhZmFjMTlmODllZmU0ZTk9MTMzMyYmdXJsPWh0dHAlM0ElMkYlMkZsaXN0cyUyRWF1c25vZyUyRW5ldCUyRm1haWxtYW4lMkZsaXN0aW5mbyUyRmF1c25vZw==> -- Lachlan Gilmour [https://www.google.com/a/surfpacific.com.au/images/logo.gif] w : surfpacific.com.au<http://antispam.csu.edu.au:32224/?dmVyPTEuMDAxJiZiYzQ0M2I2NGM3OTg5ZTk0ZD02MTU2NzYzNV83NTY2MV8xNTEwNl8xJiY0ZWVkYTk1OTRlZmU5YWY9MTMzMyYmdXJsPWh0dHBzJTNBJTJGJTJGc3VyZnBhY2lmaWMlMkVjb20lMkVhdSUyRg==> p : +61 7 5571 1161<tel:+61755711161> f : +61 7 5676 6652 e : [email protected]<mailto:[email protected]> a : Suite 30307, Level 3, Tower 3 Southport Central Commercial, 9 Lawson Street, Southport, Queensland 4215, Australia. 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