Knowledge Base
SSL for Subdomains
Securing Subdomains with SSL
How to get SSL certificates for your subdomains.
Automatic Coverage
When requesting Let's Encrypt, you can include subdomains:
- example.com
- www.example.com
- blog.example.com
- shop.example.com
Adding Subdomains to Certificate
- Go to SSL Certificates in DirectAdmin
- Edit your Let's Encrypt certificate
- Add subdomains to the list
- Request new certificate
Separate Certificates
Each subdomain can have its own certificate if needed.
Wildcard Certificates
Wildcard (*.example.com) covers all subdomains:
- Let's Encrypt supports wildcards
- Requires DNS validation
- Covers unlimited subdomains
Common Subdomain SSL Issues
- Subdomain not included: Add to certificate
- DNS not pointing: Update A record
- Wrong certificate shown: Check certificate order
Best Practice
Request a single certificate covering your main domain and all subdomains you use.