Multi domain (SAN) is a built-in feature that comes with an SSL certificate which lets users secure multiple domains under a single certificate. Depending on the certificate authority, a user can secure up to 250 domains under a single multi-domain SSL certificate. Securing multiple domains using SAN certificate saves money and SSL management time. Certificate authorities (CAs) such as Symantec, Thawte etc. allow users to add up to 25 domains.
Multi-Domain/SAN SSL Certificate Structure
Under a multi-domain SSL, the first domain is considered as primary domain and other domains are considered as SAN (Subject Alternative Names) domains. For example, if a user wishes to secure five different domains under a single certificate, the first domain which was added during SSL signup process will be the base domains and other 4 domains will be considered as SAN domains. A multi-domain SSL can be availed with domain validation (DV), organization validation(OV), and extended validation(EV).
In case of DV, the verification process will be completed by verifying domain-registrar’s information or via email/file based verification. Whereas in a case of OV and EV, the verification process involves validating business and personal documents. Here it is worth noting that document requirement policy may differ from one CA to the other.
Mostly all the certificate authorities(CAs) offers unlimited number of server licenses with each SSL certificate. It means that a user can secure his/her domain(s) on unlimited number of servers. A few certificate authorities have come up with single server licenses. In this case, the user needs to purchase an additional license for every additional server.
See Also: What is Wildcard SSL Certificate?
Domains a SAN SSL certificate can secure
Under a single multi-domain SSL certificate, a user can secure any number of domains. The examples of multi-domain are given below.
Multi Domain SSL Certificate Specifications
Each SAN SSL certificate comes up with a 2048-bit signature which is strengthened with the 256-bit long encryption key. It supports on 99.9% web and mobile browsers and is compatible with all leading desktop and mobile-based operating system. It enables encryption which can secure up to 250 multiple fully-qualified domain names.
Certificate Authority and Multi-Domain Policy
- Comodo Multi Domain with 250 SAN Domains
- GeoTrust True BusinessID Multi Domain with 100 SAN domains
- Thawte Web Server SSL with 25 SAN domains
- Symantec Secure site SSL with 25 SAN Domains
- GlobalSign Multi Domains SSL with 100 SAN Domains
- Entrust Multi-Domain SSL Certificates with 250 SAN Domains
- DigiCert Multi-Domain (SAN) Certificate with 25 SAN Domains
- GoDaddy Multi-domain SSL with 5 SAN Domains
Multi Domain SSL Key Features:
- Can secure up to 250 domain names with single SSL certificate
- 2048-bit future proof SSL Certificates
- A single certificate secures both www.domain.com and domain.com
- SHA-256 signed certificates
- 99% web and mobile browser compatibility
- Supports all server types
Comparison of Leading Multi-Domain SSL Certificates
|Certificate Authority (CA)||COMODO||THAWTE||COMODO||GeoTrust®||SYMANTEC™|
|SSL Certificate||Positive Multi-Domain SSL||SSL Web Server||Multi-Domain SSL||QuickSSL Premium Multi-Domain||Secure Site|
|CA Rating||COMODO Reviews||THAWTE Reviews||COMODO Reviews||GeoTrust Reviews||Symantec Reviews|
|Pricing for 1 Year||$23.99||$99||$149||$120||$329|
|Pricing for 2 Years||$20.99/Year||$86.50/Year||$130.38/Year||$101.50/Year||$279/Year|
|As Low As||$19.99/Year||$82.33/Year||$124.17/Year||95$/Year||$274/Year|
|Domains Secured||Multiple||Single + SAN (Extra Cost)||Multiple||Single + SAN (Extra Cost)||Single + SAN (Extra Cost)|
|Number of Domains Included||2 Different Domain Names Included||N/A||4 Different Domain Names Included||N/A||N/A|
|Issuance Speed||Issued in Minutes||Within 1-3 Days||Within 1-3 Days||Issued in Minutes||Within 1-3 Days|
|Validation Required||Domain Validation||Business Validation||Business Validation||Domain Validation||Business Validation|
|Notification Level in Web Browsers||Domain Name Shown On Certificate Only||Domain Name and Organization Name Shown On Certificate||Domain Name and Organization Name Shown On Certificate||Domain Name Shown On Certificate Only||Domain Name and Organization Name Shown On Certificate|
|Encryption Strength||Up to 256 Bit||Up to 256 Bit||Up to 256 Bit||Up to 256 Bit||Up to 256 Bit|
|Browsers Compatibility||99% + Most popular mobile devices||99% + Most popular mobile devices||99% + Most popular mobile devices||99% + Most popular mobile devices||99% + Most popular mobile devices|
|Include Site Seal||Included||Included||Included||Included||Included|
|Number of Free Reissues Allowed||Unlimited||Unlimited||Unlimited||Unlimited||Unlimited|
|Number of Server License||Unlimited||Unlimited||Unlimited||Unlimited||Limited|
|Free PCI Scanning||N/A||N/A||Yes||N/A||N/A|
|Free Daily Vulnerability Scanning||N/A||N/A||Yes||N/A||N/A|
|Refund Policy||30 Days||30 Days||30 Days||30 Days||30 Days|
|Certificate Authority Review||Read Reviews||Read Reviews||Read Reviews||Read Reviews||Read Reviews|
|Read More||Read More||Read More||Read More||Read More||Read More|
|Buy Now||Buy Now||Buy Now||Buy Now||Buy Now||Buy Now|
Multi-Domain (SAN) Certificate Video Tutorial
Different Types of SSL Certificates
Multi Domain SSL Cert Installation Guide & Tools
- Install Multi Domain SSL on your Server
- Generate CSR for Multi-Domain SSL
- Multi Domain SSL Checker
- Multi Domain SSL Converter