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What is a SAN
See Example: SSL Certificate - Generate a Key and CSR. Tableau Server uses Apache, which includes OpenSSL. You can use the OpenSSL toolkit to generate a key file and Certificate Signing Request (CSR) which can then be used to obtain a signed SSL certificate. Steps to generate a key and CSR. One of the most versatile SSL tools is OpenSSL which is an open source implementation of the SSL protocol. There are versions of OpenSSL for nearly every platform, including Windows, Linux, and Mac OS X. OpenSSL is commonly used to create the CSR and private key for many different platforms, including Apache. However, it also has hundreds of different functions that allow you to view the. The following instructions will guide you through the CSR generation process on Nginx (OpenSSL). To learn more about CSRs and the importance of your private key, reference our Overview of Certificate Signing Request article. If you already generated the CSR and received your trusted SSL certificate, reference our SSL Installation Instructions and disregard the steps below.
A SAN is a Subject Alternative Name, and as the name implies it serves as a secondary (or tertiary, etc.) DNS name that your web application could be identified as. This is useful in the context of web farms behind a reverse proxy, load-balancing solutions, etc.
For example:
Modern Browsers will show an SSL certificate as invalid if a proper SAN is not included, so it’s best practice for us to be in the habit of including SANs in our CSRs.
How to include a SAN
Because we want to include a SAN (Subject Alternative Name) in our CSR (and certificate), we need to use a customized openssl.cnf file.
While you could edit the ‘openssl req’ command on-the-fly with a tool like ‘sed’ to make the necessary changes to the openssl.cnf file, I will walk through the step of manually updating the file for clarity.
Example openssl.cnf file
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Note that the subjectAltName declaration calls an array called @alt_names, which is defined at the bottom of the file.
To include a single SAN in your CSR, update the ‘DNS’ declaration to the appropriate value (in this example, ‘webserver1.scriptech.io’), and leave the DNS.x declarations commented out (#). The result is an @alt_names array with a single entry.
To include multiple SANS in your CSR, comment out (#) the ‘DNS’ declaration, and uncomment the DNS.x declarations that you need. For example, your [alt_names] section would look like:
The result is an @alt_names array with multiple entries.
Generate the new key and CSR
If you have not already, copy the contents of the example openssl.cnf file above into a file called ‘openssl.cnf’ somewhere. Make note of the location.
Also make sure you update the DN information (Country, State, etc.)
Create a new key
Create a new CSR
Verify the CSR
To view the contents of your new CSR, use the following command:
This example shows a single SAN which I included in my openssl.cnf file.
Sign the CSR
Now that you have your properly-formatted CSR, you need to sign it using a Trusted Root Certificate Authority. Depending on your context, this could be a third-party CA like DigiCert or GoDaddy, or it could be an internal Certificate Authority (OpenSSL CA, Active Directory Certificate Services)
The contents of a certificate in the openssl format can be viewed with the following command:
OpenSSL CSR Wizard
Our OpenSSL CSR Wizard is the fastest way to create your CSR for Apache (or any platform) using OpenSSL.
Fill in the details, click Generate, then paste your customized OpenSSL CSR command in to your terminal.
Fill in the details, click Generate, then paste your customized OpenSSL CSR command in to your terminal.
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Note: After 2015, certificates for internal names will no longer be trusted.
Common Name (Server Name) The fully qualified domain name that clients will use to reach your server. For example, to secure https://www.example.com, your common name must be www.example.com or *.example.com for a wildcard certificate. Although less common, you may also enter the public IP address of your server. Department (optional) You can leave this field blank. This is the department within your organization that you want to appear on the certificate. It will be listed in the certificate's subject as Organizational Unit, or 'OU'. Common examples: Web Administration, Web Security, or Marketing City The city where your organization is legally located. State or Province The state or province where your organization is legally located. Country We guessed your country based on your IP address, but if we guessed wrong, please choose the correct country. If your country does not appear in this list, there is a chance we cannot issue certificates to organizations in your country. Organization name The exact legal name of your organization, (e.g., DigiCert, Inc.) If you do not have a legal registered organization name, you should enter your own full name here. Key RSA Key sizes smaller than 2048 are considered unsecure. Now just copy and paste this command into a terminal session on your server. Your CSR will be written to ###FILE###.csr. |
After you've created a Certificate Signing Request (CSR) and ordered your certificate, you still need to install the SSL certificate on your server.
For instructions on how to install SSL certificates, see SSL Certificate Installation Instructions & Tutorials.
For instructions on how to install SSL certificates, see SSL Certificate Installation Instructions & Tutorials.
Where do I paste this command?
You can run this command wherever you have OpenSSL available—most likely on your server, but you can also run it on your own computer since macOS comes with OpenSSL installed. Just make sure you keep track of your private key file after you create your CSR; you'll need that private key to install your certificate. Generate cert.pem and key.pem windows 7.
Openssl Generate Cert From Csr And Keyboard
What happens when I run this command?
Openssl Generate Csr And Private Key
OpenSSL creates both your private key and your certificate signing request, and saves them to two files: your_common_name.key, and your_common_name.csr. You can then copy the contents of the CSR file and paste it into the CSR text box in our order form.
What kind of certificate should I buy?
If you want an SSL certificate for Apache, your best options are Standard certificates and Wildcard certificates.
A DigiCert Wildcard can protect all server names on your domain (e.g., *.example.com,). Our unlimited server license lets you protect all your servers for just one price. Many of our customers save thousands of dollars per year by using a DigiCert Wildcard certificate.
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Standard certificates are able to protect one server name (e.g., mail.example.com). If you only need SSL for one hostname, a Standard certificate will work perfectly.
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What If I Need Subject Alternative Names?
Multi-Domain (SAN) certificates allow you to assign multiple host names—known as Subject Alternative Names or SANs—in one certificate.
Using OpenSSL to Add Subject Alternative Names to a CSR is a complicated task. Our advice is to skip the hassle, use your most important server name as the Common Name in the CSR, and then specify the other names during the order process. Our Multi-Domain (SAN) certificate ordering process allows you to specify all the names you need without making you include them in the CSR.
You can also use OpenSSL to create a certificate request for your code signing certificate.
Si desea información en español a Hacer un CSR Utilizando OpenSSL.
Si desea información en español a Hacer un CSR Utilizando OpenSSL.
Openssl Generate Cert From Csr And Key Download
Related:
Openssl Generate Cert From Csr And Key Card
Openssl Generate Cert From Csr And Key Free
- Learn more about what our Wildcard certificate can do for you.
- We also have a similar CSR Tool for Exchange 2007.