How to Install SSL Certificate on Webmin Server

Webmin is a web-based interface for system administration for Unix machines. Webmin is developed by Jamie Cameron, it can be used on 99% web browsers to setup user accounts, Apache, DNS, file sharing and so on.

Here we will guide you the installation process of SSL certificate on Unix server via Webmin interface. Before going ahead make sure that you have purchased SSL Certificate and Generated the CSR.

Installation Requirements:

Your server certificate

This is the certificate you received from the CA for your domain. You may have been sent this via email. If not, you can download it by visiting your Account Dashboard and clicking on your order.

Your intermediate certificates

These files allow the devices connecting to your server to identify the issuing CA. There may be more than one of these certificates. If you got your certificate in a ZIP folder, it should also contain the Intermediate certificates, which is sometimes referred to as a CA Bundle. If not, download the appropriate CA Bundle for your certificate.

Your private key

This file should be on your server, or in your possession if you generated your CSR from a free generator tool. On certain platforms, such as Microsoft IIS, the private key is not immediately visible to you but the server is keeping track of it

Installation Instructions

Copy Certificates to the Server

  1. Copy your certificate files (SSL & intermediates), along with your private key, and put them on your server.
  2. Locate your Miniserv.pem file: It’s usually located in the same directory as your Miniserv.conf file. You’re going to be replacing miniserv.pem with a new one you will create shortly.
  3. Create a new Miniserv.pem There are two ways to do this, either enter the following command line: cat private.keyyourdomain.crt > new-miniserv.pem OR, you can open both your SSL certificate and private key, paste both into a new .txt file (key first, then certificate) and save it as new-miniserv.pem.
  4. Configure your miniserv.conf fileFinally you’ll need to add your intermediate. Open your .conf file and enter the location of the intermediate you copied to the server earlier:
    extracas=/etc/webmin/intermediate_certificate.crt

Congratulations! You’ve successfully installed your SSL certificate! To check your work, visit the website in your browser at https://yourdomain.tld and view the certificate/site information to see if HTTPS/SSL is working properly. Remember, you may need to restart your server for changes to take effect.

Posted: February 1, 2018
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