What is a Multi Domain SSL? What is SAN SSL Certificate?
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what is multi domain ssl

06/10/2020 by admin with 0 comments

What is a Multi Domain SSL? SAN SSL Certificate Information


The full form of SAN is Subject Alternative name. It is describing as SSL/TLS certificate which will secure the multi-domain certificate. Instead of purchasing a separate single SSL certificate for each domain, you can now purchase a multi-domain certificate for all your SSL domain.


There are a variety of reasons for purchasing an SSL certificate for the business. The SAN allows you to secure any additional name. Securing your information via multi-domains may be a headache and difficult to handle as compare to the SAN certificate which will be handy and secure different domains in a single certificate.



Every business wants that more and more people visit their website and purchase goods and services. The business owner can do it by providing security to the customers regarding their information privacy and build up customer’s trust. This can be done by HTTPS protocols on the website.


The HTTPS protocols are secure as compare to HTTP ones. The HTTPS secured websites create encrypted communication without any transformation of information either of the company and the customer. The HTTP connection will intercept the information and can be accessed by third parties.


The customer will visit your website and suggest others only when you provide them with a secure and encrypted network.



There are 3 options through which you can secure multi-domain with SSL certificate:

1. Multi-domain/SAN certificate

2. Wildcard certificate

3. UCC certificate


The selection of your SSL certificate will totally depend on your requirements, office environment, or on your future plans.


Requirements for multi-domain SSL certificate

There are not many requirements for issuing the multi-domain SSL certificate. The domain name should be registered under the domain owner’s name. the domain should be account for under prove ownership. The requirements by the client are the contact information of the applicant and the corporate title.


The level of security in SSL certificates will not differ. Each and every SSL certificate provides you with the same level of security. The owners no need to worry about this that certificate will provide more security and this provides less. If you but SSL certificate from the trustworthy authorities, then your information is in the safe hands and cannot be accessed by third parties.


When the owner enters the browser which is secured and encrypted with an SSL certificate then he/she will get to know about SSL handshake. This will ensure the coding and encoding of the user’s information.


During this process, the running browser will show that the website is secured with an SSL certificate and enable a secure connection by using the public key which is in the client’s hand and a private key through which the only server can access. This will have made a secure connection and encrypt the data. The user who visits your website, the SSL handshake will also save their information and data.


Related Article – SSL Handshake Failed Error


The structure of the multi-domain SSL certificate is safe and secure the same as all other certificates. This will provide a single user IP address that can work on a multi-domain system and encrypt many domains at a single point.


The primary SSL certificate will be issued by adding a variety of domain names on the single certificate. After that only one certificate will be installed for many domain names and secure the information of different domains.



The multi-domain certificate is also known as SAN (Subject Alternative Name) certificate. The most common hostnames in the SAN certificate are DNS (Domain Name System) names and else like IP addresses and URLs. This will be the best option for the business that runs multiple websites. The multi-domain SAN certificate can be availed 3 types of validation:


Domain validation (DV)

Organization validation (OV)

Extended validation (EV)


The Domain Validation (DV) verify the domain’s registrar information completion via mail or file documents whereas in organization validation (OV) and Extended Validation (EV) the verification will be done by personal and business documents.



The certificate management is very important and if it’s done wrong then it can screw up any IT professional. The SAN SSL certificate will be the right choice if you are simplifying your certificate management process, decrease costs, and raise the efficiency of your overall business.


It will be easier to manage one SAN certificate which has one expiration date and secure multiple domain names as compare to the different certificates for different domain names with a variety of expiration dates. For example – assume that you are a business owner of a particular company name anything. Now you can secure example.com, example.net, example.biz, and etc., from a single SAN certificate.



The multi-domain SSL certificate can secure up to 250 domain names under a single SSL certificate.

This is the future proof SSL certificate with 2048-bit.

The compatibility of the multi-domain SSL certificate is 99% on the web and mobile browsers.

This will support all the types of servers.



The fully-qualified domain names (FQDN) within one certificate is the ability to provide security to the multi-domain names. The specific FQDN will be secured by the multi-domain certificate which needs to be entered into the certificate. In most cases, a single multi-domain certificate can secure 100 FQDNs.


Provides you the warranty and guarantee of the security under the certificate.

Provides you the seal of the website.

If one wants to replace the certificate, then it can be done at zero cost or free.



The choice of the certificate that whether it will be a multi-domain SAN certificate, Wildcard certificate, or UCC certificate totally depends on business owner domain number, subdomains, and future plans for the variety of websites. The best choice for securing the multiple domain names at one point is the SAN certificate.


This will not only provide you security and encryption to the business owner domain names but also provide privacy to the user’s information. The level of the security will not change under any certificate and it also a budget-friendly option.

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