The IP address can apply for an SSL certificate for free, it is valid for 90 days and can be issued multiple times!

The most common one is the domain name SSL certificate. Platforms such as Alibaba Cloud, Tencent Cloud, etc. all support the application for free SSL certificates (valid for 1 year). Can the IP address be directly uploaded to the SSL certificate? The answer is: yes!

Official website address

ZeroSSL.com

Free plan

Each email account can issue 3 SSL certificates per month (IP issuance is supported)

Preparation

1) It must be a public IP (intranet IP application is not supported, and IPs outside mainland China are acceptable)

2) During the application process, you need to verify the ownership of the IP and build a simple website (you can use Nginx, etc., there is a simple way)

Brief operations

1) To access ZeroSSL and register an account, you only need your email address and password.

2) Enter the IP address for which you need to apply for a certificate on the home page.

3) Since it is a free plan, you can only apply for a certificate valid for 90 days.

4) The CSR can be automatically generated. Choose the free plan.

5) Verify IP ownership. Verification can only be completed by accessing the specified file.

Nginx is easier to operate. Just configure the default access directory address to create the specified directory and upload the specified file!

If the server does not have web services such as Nginx installed. You can borrow this command:

Create the specified directory and upload the specified file in the current directory, and then execute the above command to access it!

6) After successful verification, the certificate we need is generated! You can download the certificate format we need!

7) The configuration of the certificate will not be explained here! There are many tutorials online!

Final notes

The IP certificate only supports IP access and does not support the use of domain names resolved to IP.

After the 90 days expires, it needs to be reissued. Follow the steps in this article.

Let’s Encrypt does not support issuing IP certificates.

The paid plan supports the issuance of certificates with a validity period of 1 year, and the price is not cheap.

However, the paid package supports API. If you want to build it yourself and issue it to others, you can have fun!

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