Let's Encrypt - DST Root CA X3 expiration (September 2021)

[tienloc1]

I'm a noob so I'm not sure if it will affect all my sites work with Let's Encrypt used myvestacp or not? If yes, are there any steps to update it as soon as possible?

TIA!

[myVesta]

Well, it will not affect servers, but it will affect old mobile phones and WinXP users.
And there is nothing we can do - those users must buy new mobile phones or to try Firefox on WinXP.

On server side everything will work fine for serving sites.

BUT...
Servers that didn't run update for a long time may expirience problem with curl.
So, incoming connections (to the server) will works fine, BUT, when server try do download something with curl - it can fail - curl will not accept certificate from remote server.
Just update the server - and problem will be solved - viewtopic.php?f=28&t=270

[tienloc1]

Well, it will not affect servers, but it will affect old mobile phones and WinXP users.
And there is nothing we can do - those users must buy new mobile phones or to try Firefox on WinXP.

On server side everything will work fine for serving sites.

BUT...
Servers that didn't run update for a long time may expirience problem with curl.
So, incoming connections (to the server) will works fine, BUT, when server try do download something with curl - it can fail - curl will not accept certificate from remote server.
Just update the server - and problem will be solved - viewtopic.php?f=28&t=270

Thank you so much for your details.