apache - After changing the https certificate of the domain name, some computers cannot open it.

Question

The domain name originally had a certificate, but since I applied for a free certificate from WoSign, I had to apply again every time I added a second-level domain name. After deploying the new certificate I applied for, I found that some computers can open the domain name of https://, but some cannot open it, and it says that the certificate is invalid. How to fix it?

Answer 1

1. There is a reason for "certificate is invalid". Please post that reason.

2. Different operating systems and browsers have different support for TLS and CA, especially old systems are likely to have problems. Please send us the operating system version and browser version of the computers that have access problems.

3. Alternative reasons: The certificate issuing authority (CA) support is not extensive enough; there are clients such as Windows XP that do not support SNI, and the server requires SNI; the algorithm used by the certificate is not supported by some systems; the certificate does not configure the correct intermediate certificate , some clients are missing intermediate certificates and will not download them online.