All Internal Names and Reserved/Internal IP addresses SSL Certificates expired on November 1, 2015.
Important! Certificate Authorities will not issue any SSL Certificates with common names or SAN containing Reserved/Internal IP addresses or Internal Names after November 1, 2015.
The reason for these changes is the impossibility to verify internal names or reserved IP addresses publicly, as CA/B Forum's new rule states that all common names and SAN names shall be verified externally.
What is the CA/B Forum?
The CA/B Forum is a method of collaboration between CAs (Certificate Authorities) and Browsers(web-browser companies such as Mozilla).
What are the Internal Name and the Reserved IP address?
The Internal name is a name that can't be accessible from the Internet, because it is located in a private network.
A reserved IP address is an IP address from the reserved range (RFC 1918 and RFC 4193) for use in a private network, so it cannot be accessed directly trough the Internet.
I use Internal Names. What shall I do?
You should reconfigure your infrastructure to work with external domain names. External availability is by no means obligatory, so you can restrict access to your domain names by using a firewall.
The most simple approach is to buy a Wildcard SSL Certificate, that will protect all subdomains, for a registered external domain name such as yourorganization.com, and use subdomains (sub.yourorganization.com, sub1.yourorganization.com, …) for your company's internal needs.
Our recommended Wildcard SSL Certificate is Comodo Essential Wildcard.
Can I still use external IP addresses?
Sure. The only SSL certificate that supports external IP addresses is a business SSL certificate - InstantSSL Premium.
Nowadays, getting an SSL certificate is becoming mandatory as its popularity is increasing every year. It is one of the best ways to secure your website and protect all the data transferred between your website and the end-user
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