On September 30 2021, Let's Encrypt updated their ROOT certificate. Hopefully, this will help alleviate a lot of the problems that were pending, but it's not a solution to all problems as any client that enforces the expiration date of the root certificate that Older devices may be using the older Root CA which expired today (September 30th, 2021). The Root is the ISRG Root X1 Valid from to The intermediate is R3: Thursday, September 3, 2020 7:00:00 PM 打开 Keychain Access 应用. For Android users, this includes any device running a version older than 7. On the keyboard, press Win + R Type certmgr. The rogue antivirus software and then microsoft root authority certificate expiring 2020 Windows Defender book will help you in deploying administering 2. Windows >= 7* * assuming Automatic Root Certificate Update isn't manually disabled. Certificate Summary: Subject: ISRG Root X1 Issuer: ISRG Root X1 Expiration: 11:04:38 UTC Key Identifier: 79:B4:59:E6:. Follow these steps: Download a fresh certificate from the website of its publisher (Let's Encrypt) using this Manually remove the IdenTrust DST Root CA X3 root certificate and install the standalone (not cross-signed) ISRG Root X1 root certificate. 
However, the web browser seems to pull the correct certificate from the firewall (nextcloud is behind HAproxy). Then, with the root certificate in hand, you next need to actually install it.
Now that Let's Encrypt is issuing their certificates from ISRG Root X1 / Let's Encrypt Authority X3 certificate authority, my Fedora is failing to access sites with curl. Quote Post by Rocinante » Mon 12:56 am ↳ Windows Domain & Active Directory ↳ iSCSI – Target & Virtual Disk You should see the R3 certificate ( s:/C=US/O=Let's Encrypt/CN=R3) in the output, e. In that case, download the ISRG Root X1 certificate from LE's website and manually import it to the machine-wide Trusted Roots store. pokud vlastníte OS Windows 7 a nedaří se vám připojit na hru, skrze zastaralý kořenový certifikát. The cross-signature root certificate will expire on September 1, 2021. PS: You can validate the certificates in the Windows Certificate Manager. Note: I did not remove the IdentTrust cert.
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