Add PFX generation instructions

This should help customers who want to use the PFX/PKCS12 format

source/domains/ssl/generating_pfx_files.md

@@ -0,0 +1,61 @@
+# How to Generate a PFX File
+
+```eval_rst
+   .. title:: SSL | Generating a PFX file
+   .. meta::
+      :title: SSL | Generating a PFX file | ANS Documentation
+      :description: Generating a PFX file
+```
+This guide will help you generate a PFX (also known as PKCS#12) file on different operating systems.
+
+## Generate a PFX file on Linux
+
+First, check if OpenSSL is installed:
+
+```shell
+openssl version
+```
+
+If OpenSSL is not installed, you will see an error message. In that case, install OpenSSL:
+
+#### Ubuntu
+
+```shell
+sudo apt install openssl
+```
+
+#### RHEL/AlmaLinux
+
+```shell
+sudo yum install openssl
+```
+
+Now you can generate the PFX file.
+
+Suppose you have a private key file (`privateKey.key`), a certificate file (`certificate.crt`), an intermediate certificate file (`intermediate.crt`) and a root certificate file (`root.crt`).
+Open a terminal and run the following command:
+
+```shell
+openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile intermediate.crt  -certfile root.crt
+```
+
+You’ll be prompted to set an export password to protect the PFX file. Remember this password; you’ll need it later.
+
+## Generate a CSR on Windows
+
+Check if OpenSSL is Installed by opening a Windows Command Prompt and entering:
+
+```powershell
+openssl version
+```
+
+If OpenSSL is not installed, you will see an error message. In that case, install OpenSSL following the official instructions located at <a href="https://github.com/openssl/openssl/blob/master/README.md" target="_blank">https://github.com/openssl/openssl/blob/master/README.md</a>.
+
+Suppose you have a private key file (`privateKey.key`), a certificate file (`certificate.crt`), an intermediate certificate file (`intermediate.crt`) and a root certificate file (`root.crt`).
+Open a terminal and run the following command:
+
+```powershell
+openssl pkcs12 -export -out certificate.pfx -inkey privateKey.key -in certificate.crt -certfile intermediate.crt -certfile root.crt
+```
+
+You’ll be prompted to set an export password. Remember this password for future use.

source/domains/ssl/index.rst

@@ -12,4 +12,5 @@ SSL Certificates
    Self Signed Certificates <self_signed_certificates>
    Using Server Name Indication (SNI) <sni>
    Extended Validation Certificates <extended_validation_ssl>
+   Generating a PFX file <generating_pfx_files>
    letsencrypt/index