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<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Creating and Applying SSL Certificates for Webmin Admin Interface</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta charset="UTF-8">
<meta name="keywords" content="Webmin,SSL,HTTPS,Certificate,PKI,Private Key Infrastructure,Secure,Web Tools,Web Administration,Linux,Debian,Browser Based,Web Based,Web Based Tools,Browser Based Tools,Certificate Authority,Certificates,System Administration,XCA,X Certificate Key Manager,X Certificate And Key Management,Server Administration,Self-Signed SSL,Self-Signed PKI,Self-Signed HTTPS,Self-Signed Certificates,SSL Certificates,How To,Tutorial,i12bretro">
<meta name="author" content="i12bretro">
<meta name="description" content="Creating and Applying SSL Certificates for Webmin Admin Interface">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="revised" content="10/24/2022 10:07:58 AM" />
<link rel="icon" type="image/x-icon" href="includes/favicon.ico">
<script type="text/javascript" src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script type="text/javascript" src="includes/js/steps.js"></script>
<link href="css/steps.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="gridContainer">
<div class="topMargin"></div>
<div id="listName" class="topMargin">
<h1>Creating and Applying SSL Certificates for Webmin Admin Interface</h1>
</div>
<div></div>
<div id="content">
<h2>Prerequisites</h2>
<ul>
<li class="noCheckbox">A XCA PKI database <a href="https://youtu.be/ezzj3x207lQ" target="_blank">https://youtu.be/ezzj3x207lQ</a></li>
</ul>
<h2>Create Your SSL Certificate</h2>
<ol>
<li>Launch XCA</li>
<li>Open the PKI database if it is not already (File > Open DataBase), enter password</li>
<li>Click on the Certificates tab, right click on your Intermediate CA certificate</li>
<li>Select New</li>
<li>On the Source tab, make sure Use this Certificate for signing is selected</li>
<li>Verify your Intermediate CA certificate is selected from the drop down</li>
<li>Click the Subject tab</li>
<li>Complete the Distinguished Name section
<p>internalName: nettools.i12bretro.local<br />
countryName: US<br />
stateOrProvinceName: Virginia<br />
localityName: Northern<br />
organizationName: i12bretro<br />
organizationUnitName: i12bretro Certificate Authority<br />
commonName: nettools.i12bretro.local</p>
</li>
<li>Click the Generate a New Key button</li>
<li>Enter a name and set the key size to at least 2048</li>
<li>Click Create</li>
<li>Click on the Extensions tab</li>
<li>Select End Entity from the type list</li>
<li>Click Edit next to Subject Alternative Name</li>
<li>Add any DNS or IP addresses that the certificate will identify</li>
<li>Update the validity dates to fit your needs</li>
<li>Click the Key Usage tab</li>
<li>Under Key Usage select Digital Signature, Key Encipherment</li>
<li>Under Extended Key Usage select Web Server and Web Client Authentication</li>
<li>Click the Netscape tab</li>
<li>Select SSL Server</li>
<li>Click OK to create the certificate</li>
</ol>
<h2>Exporting Required Files</h2>
<ol>
<li>In XCA, click on the Certificates tab</li>
<li>Right click the SSL certificate > Export > File</li>
<li>Set the file name with a .pem extension and verify the export format is PEM + Key (*.pem)</li>
<li>Click OK</li>
</ol>
<h2>Applying the Certificates</h2>
<ol>
<li>Download PuTTY <a href="https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html" target="_blank">Download</a></li>
<li>Connect to the Linux host via PuTTY</li>
<li>Install Webmin if it is not already installed
<div class="codeBlock"><code>wget http://prdownloads.sourceforge.net/webadmin/webmin_1.941_all.deb<br />
sudo dpkg -i webmin_1.941_all.deb<br />
sudo apt-get -f install</code></div>
</li>
<li>Copy the certificates exported above to the Linux device</li>
<li>Copy the certificates exported above to /etc/webmin
<div class="codeBlock">cp /home/pi/Downloads/webmin.pem /etc/webmin</div>
</li>
<li>Open a web browser and navigate to Webmin via https://DNSorIP:10000</li>
<li>Login with the root username and password</li>
<li>Navigate to Webmin > Webmin Configuration > SSL Encryption</li>
<li>Click the browse button next to the Private key file field</li>
<li>Navigate to /etc/webmin and select the webmin.pem certificate</li>
<li>Make sure the certificate file is set to <span class="awradio awobject">Same file as private key</span></li>
<li><span class="awradio awobject">Click the save button</span></li>
<li><span class="awradio awobject">Webmin will apply the certificate and restart</span></li>
<li>Close the web browser and relaunch using the DNS or IP address setup in the SSL certificate</li>
</ol> </div>
</div>
</body>
</html>