With ali symantec, until this year replaced the Let 's certificate of Encrypt, found the following strange questions, come to consult:
1, in some very old computer systems, IE directly show "unable to access web pages," rather than a certificate error such as
2, firefox browser sometimes tip "unable to securely connect to this page, the site use expired or unsafe TLS security Settings"

Above problem when using symantec certificate is nonexistent, symantec, sometimes because the client certificate of lack of trust root and tip has a problem, and Let 'sEncrypt directly is unable to open the web page to this one, is really don't understand,

Certificate itself is effective, at least in the most on the client side is normal access to :


Here is a problem:




Most of the client can still normal access:

CodePudding user response:

No one encountered this problem?

CodePudding user response:

Certificate in support of the agreement and the client browser support caused by mismatch can be detected using myssl.com

CodePudding user response:

You need to specify subdomain oh,

CodePudding user response:

Encryption suite? Configuration or certificate compatibility is convenient to compare the old system does not support, can add a cross certificate in increase compatibility