SSL guide

What is wildcard SSL?

A wildcard SSL certificate secures many subdomains under the same domain, such as app.example.com and mail.example.com.

WildcardUses a pattern such as *.example.com.
FlexibleUseful when you have many current or future subdomains.
HTTPSHelps secure multiple hostnames under one certificate scope.

When wildcard SSL is useful

  • Many app or service subdomains
  • Changing sets of customer or environment hostnames
  • Admin, API, mail, and portal subdomains
  • Simpler certificate coverage planning

What it covers

  1. 1. One domain familyThe certificate is issued for a wildcard name.
  2. 2. Many subdomainsEligible subdomains under that level are covered.
  3. 3. Future flexibilityNew matching subdomains can use the same certificate scope.

Need flexible HTTPS coverage?

DNSExit Free SSL tools support wildcard certificates for domains you control.

Explore Free SSL Read DNS validation guide
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Keep moving with the guide that matches the problem.

Keep remote access working Start with Dynamic DNS when your public IP changes. Fix email delivery Separate outbound sending issues from inbound mail problems. Automate DNS and SSL Use API-driven DNS updates and validation workflows. Compare service options Choose the right email setup before you commit.
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