How Much to Spend on an SSL Certificate

To choose the best one, consider what information your visitors will share.

For example, if you manage a website that requires customers to give personal details or processes financial transactions, we recommend opting for an EV certificate that offers a higher security level. If you run a blog without a transaction page, a DV certificate ($8/year) might be enough.

For more info, read here.

What is X.509 certificate?

X.509 is a standard format for public key certificates, digital documents that securely associate cryptographic key pairs with identities such as websites, individuals, or organizations.

First introduced in 1988 alongside the X.500 standards for electronic directory services, X.509 has been adapted for internet use by the IETF’s Public-Key Infrastructure (X.509) (PKIX) working group

Common applications of X.509 certificates include:

  1. SSL/TLS and HTTPS for authenticated and encrypted web browsing
  2. Signed and encrypted email via the S/MIME protocol
  3. Code signing
  4. Document signing
  5. Client authentication
  6. Government-issued electronic ID

For more info, read below;

X.509 FAQ

Hosting multiple domain under one app service

Hosting multiple domains under one app service

I am looking at taking our product page gallery and hosting it under multiple domains but keeping it with one app service so it is easy to deploy updates across these multiple domains. The code for this site would handle the UI change based on the domain.

Would hosting a simple app service and just adding multiple CNAME records be the best option for this? How many CNAME records can you have for one app service and how many SSL certificates?

https://docs.microsoft.com/en-us/answers/questions/117338/hosting-multiple-domains-under-one-app-service.html

I understand how to add multiple domains to a web app. What if I have say 100+ other company domains that I want to reference to the same webapp. These companies would create their own subdomains to point to this website the example is.

https://discovery.company1.com
https://discovery.company2.com
https://discovery.company3.com
….

I would assume I would need to host a separate SSL for each company and connect each CNAME. I am more just concerned I would hit a block after so many of these added to the same web app or wondering if there is a better option I should use in Azure if anyone knows of.

Azure App service allows 500 Custom domains per app that will be over this limit.

Read about X.509 certificates