Add the CA cert for your server to the existing default CA certificate store. The default CA certificate store can changed at compile time with the following configure options:--with-ca-bundle=FILE: use the specified file as CA certificate store. CA certificates need to be concatenated in PEM format into this file.

Install Intermediate Certificate - SSL Certificate Provider SHA-256 - Orders March 31, 2014 and After. AlphaSSL SHA-256 R1 Intermediate Certificates AlphaSSL CA - SHA256 - G2 SHA256 - RSA - 2048 Valid until: 20 February 2024 AlphaSSL CA Bundle - SSL2BUY SSL Intermediate and Root CA Bundle 31. AlphaSSL CA Bundle 1; Comodo CA Bundle 6; GeoTrust CA Bundle 6; RapidSSL CA Bundle 2; Sectigo CA Bundle 6; Symantec CA Bundle 4; Thawte CA Bundle 6; SSL Tools 5; SSL/TLS Security Errors 17

Installing your Certificate on Apache Mod_SSL / OpenSSL

A certificate authority (CA), also sometimes referred to as a certification authority, is a company or organization that acts to validate the identities of entities (such as websites, email addresses, companies, or individual persons) and bind them to cryptographic keys through the issuance of electronic documents known as digital certificates. Get a signed certificate back as well as their root certificate and intermediate certificate (CA-BUNDLE). Upload the certificate and CA-BUNDLE to the webserver via cPanel, Plesk, w\e. My question is simply, what is the purpose of the CA-BUNDLE? My certificate gets signed by a DigiCert Intermediate CA which is signed by DigiCert's root CA. SSL Intermediate and Root CA Bundle 31. AlphaSSL CA Bundle 1; Comodo CA Bundle 6; GeoTrust CA Bundle 6; RapidSSL CA Bundle 2; Sectigo CA Bundle 6; Symantec CA Bundle 4; Thawte CA Bundle 6; SSL Tools 5; SSL/TLS Security Errors 17

To configure an HTTPS server, the ssl parameter must be enabled on listening sockets in the server block, and the locations of the server certificate and private key files should be specified: . server { listen 443 ssl; server_name www.example.com; ssl_certificate www.example.com.crt; ssl_certificate_key www.example.com.key; ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_ciphers HIGH:!aNULL:!MD5;

How to Setup Apache HTTP with SSL Certificate? - Geekflare