How to choose a common name for different domain patterns

Question

The common name for my SSL Key is .mydomain.com . What common name should i get issued so that i can use a URL like https://api.mydomain.com and https://api-test.mydomain.com ?

Answer 1

Somehow wildcard ssl and simple domain ssl both are same. For your SSL key concern, the only change you should is common name. Wildcard ssl requires key for *.yourdomain.tld.

PS: All SSL CA requires 2048 bit CSR key.

Here you check how it makes difference and similar.

Technical Difference:

1. Simple ssl and wildcard ssl carry different common name. As explained above.
2. Simple SSL secures only www and non-www domain name. Where wildcard secures unlimited sub-domain names.

Similar terms:

1. Both requires domain control verification process. DCV process is compulsory for everyone to acquire ssl certificate.
2. Both support same technology ssl encryption.
3. Both requires 2048-bit CSR key.

Answer 2

You can create a wildcard certificate using *.mydomain.com