The Subject Alternative Name (SAN) is an extension in X.509 certificates that allows multiple domain names, subdomains, or IP addresses to be associated with a single SSL/TLS certificate. Before that it was the Common Name field in the certificate subject which could contain a single hostname.
The Subject Alternative Name (SAN) is an extension in X.509 certificates that allows multiple domain names, subdomains, or IP addresses to be associated with a single SSL/TLS certificate. Before that it was the Common Name field in the certificate subject which could contain a single hostname.