I don't know much about secure certificates, so please bear with me...
I've got a webserver that has a single domain SSL certificate
I also have a couple of subdomains that point to different servers.
http://www.mysite.com ( main server)
http://subdomain.mysite.com (completely different server)
I am wondering: What is the best way to add SSL to the subdomain:
Is it possible to configure something like this with a wildcard certificate? Or is it better to purchase another single-domain certificate and install it on the seperate server?
Are there any special considerations / pitfalls in doing something like this?
Thanks, in advance, for your help.
You can get a wildcard cert but that is probably more expensive than you need and you'd need to copy your private key to each server -- which really is not recommended unless you are a crypto expert. You are better off simply purchasing two more certs for the two additional machines.
Wild card certificates only cover domains on the same server. I believe it's because the key used in the certificate is tied back to the server.
If you want to add a certificate for sites on other servers you will need specific certificates for those server/domain combinations.
来源：https://stackoverflow.com/questions/2958650/how-to-add-ssl-to-subdomain-that-points-to-a-different-server