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+ <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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+ <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
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+ <head>
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+ <title>Setting Up DD-WRT OpenVPN Server and Certificate Creation</title>
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+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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+ <script type="text/javascript" src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
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+ for(l=0;l<lines.length;l++){
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+ if($.trim(lines[l]) != '' && $.trim(lines[l]).substr(0,1) != '#' && $.trim(lines[l]).indexOf(' #') == -1 && lines[l].substr(0, 4).toUpperCase() != 'REM '){
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+ try {
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+ });
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+ theBox.parent('li').prevAll().each(function(i,e){
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+ theLI = $(this);
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+ if(theLI.find('input[type=checkbox]').not(':checked')){
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+ $('#'+ theLI.find('input[type=checkbox]').attr('rel')).addClass('strikethrough');
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+ }
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+ });
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+ });
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+
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+ if(window.self !== window.top){
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+ window.parent.$('iframe.stepsFrame').height((this['scrollingElement']['scrollHeight']+20) +'px');
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+ }
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+ });
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+ </script>
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+ <link href="css/steps.css" rel="stylesheet" type="text/css" />
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+ </head>
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+ <body>
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+ <div id="gridContainer">
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+ <div class="topMargin"></div>
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+ <div id="listName" class="topMargin">
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+ <h1>Setting Up DD-WRT OpenVPN Server and Certificate Creation</h1>
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+ </div>
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+ <div></div>
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+ <div id="content">
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+ <h2>
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+ Create Required Certificates</h2>
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+<ol>
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+ <li>
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+ Launch XCA</li>
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+ <li>
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+ Open the PKI database if it is not already (File > Open DataBase), enter password</li>
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+ <li>
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+ Click on the Certificates tab, right click on your Intermediate CA certificate</li>
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+ <li>
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+ Select New</li>
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+ <li>
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+ On the Source tab, make sure Use this Certificate for signing is selected</li>
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+ <li>
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+ Verify your Intermediate CA certificate is selected from the drop down</li>
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+ <li>
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+ Click the Subject tab</li>
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+ <li>
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+ Complete the Distinguished Name section
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+ <p>
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+ internalName: OpenVPN Server<br />
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+ countryName: US<br />
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+ stateOrProvinceName: Virginia<br />
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+ localityName: Northern<br />
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+ organizationName: i12bretro<br />
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+ organizationUnitName: i12bretro Certificate Authority<br />
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+ commonName: vpn.i12bretro.local</p>
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+ </li>
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+ <li>
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+ Click the Generate a New Key button</li>
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+ <li>
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+ Enter a name and set the key size to at least 2048</li>
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+ <li>
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+ Click Create</li>
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+ <li>
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+ Click on the Extensions tab</li>
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+ <li>
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+ Set the Type dropdown to End Endity</li>
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+ <li>
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+ Check the box next to Subject Key Identifier</li>
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+ <li>
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+ Update the validity dates to fit your needs</li>
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+ <li>
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+ Click the Key Usage tab</li>
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+ <li>
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+ Under Key Usage select Digital Signature and Key Encipherment</li>
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+ <li>
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+ Under Extended Key Usage select TLS Web Server Authentication</li>
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+ <li>
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+ Click the Netscape tab</li>
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+ <li>
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+ Deselect all options and clear the Netscape Comment field</li>
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+ <li>
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+ Click OK to create the certificate</li>
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+ <li>
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+ Click on the Certificates tab, right click on your Intermediate CA certificate again</li>
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+ <li>
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+ Select New</li>
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+ <li>
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+ On the Source tab, make sure Use this Certificate for signing is selected</li>
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+ <li>
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+ Verify your Intermediate CA certificate is selected from the drop down</li>
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+ <li>
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+ Click the Subject tab</li>
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+ <li>
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+ Complete the Distinguished Name section
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+ <p>
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+ internalName: OpenVPN Client #1<br />
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+ countryName: US<br />
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+ stateOrProvinceName: Virginia<br />
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+ localityName: Northern<br />
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+ organizationName: i12bretro<br />
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+ organizationUnitName: i12bretro Certificate Authority<br />
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+ commonName: VPN Client 1</p>
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+ </li>
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+ <li>
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+ Click the Generate a New Key button</li>
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+ <li>
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+ Enter a name and set the key size to at least 2048</li>
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+ <li>
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+ Click Create</li>
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+ <li>
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+ Click on the Extensions tab</li>
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+ <li>
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+ Set the Type dropdown to End Endity</li>
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+ <li>
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+ Check the box next to Subject Key Identifier</li>
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+ <li>
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+ Update the validity dates to fit your needs</li>
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+ <li>
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+ Click the Key Usage tab</li>
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+ <li>
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+ Under Key Usage select Digital Signature, Key Agreement</li>
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+ <li>
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+ Under Extended Key Usage select TLS Web Client Authentication</li>
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+ <li>
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+ Click the Netscape tab</li>
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+ <li>
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+ Deselect all options and clear the Netscape Comment field</li>
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+ <li>
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+ Click OK to create the certificate</li>
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+ <li>
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+ On the Certificates tab, click the OpenVPN Server certificate</li>
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+ <li>
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+ Select Extra > Generate DH Parameter</li>
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+ <li>
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+ Type 2048 for DH parameter bits</li>
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+ <li>
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+ Click OK</li>
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+ <li>
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+ Select a location for dh2048.pem and click Save</li>
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+</ol>
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+<h2>
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+ Exporting Required Files for OpenVPN</h2>
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+<ol>
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+ <li>
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+ In XCA, click on the Certificates tab</li>
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+ <li>
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+ Right click the Intermediate CA certificate > Export > File</li>
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+ <li>
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+ Set the file name with a .pem extension and verify the export format is PEM chain (*.pem)</li>
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+ <li>
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+ Click OK</li>
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+ <li>
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+ Right click the OpenVPN Server certificate > Export > File</li>
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+ <li>
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+ Set the file name with a .crt extension and verify the export format is PEM (*.crt)</li>
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+ <li>
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+ Click OK</li>
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+ <li>
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+ Right click the OpenVPN Client #1 certificate > Export > File</li>
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+ <li>
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+ Set the file name with a .crt extension and verify the export format is PEM (*.crt)</li>
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+ <li>
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+ Click OK</li>
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+ <li>
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+ Click on the Private Keys tab</li>
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+ <li>
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+ Right click the OpenVPN Server key > Export > File</li>
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+ <li>
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+ Set the file name with a .pk8 extension and verify the export format is PKCS #8 (*.pk8)</li>
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+ <li>
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+ Click OK</li>
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+ <li>
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+ Right click the OpenVPN Client #1 key> Export > File</li>
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+ <li>
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+ Set the file name with a .pk8 extension and verify the export format is PKCS #8 (*.pk8)</li>
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+ <li>
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+ Click OK</li>
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+</ol>
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+<h2>
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+ Setting Up OpenVPN Server in DD-WRT</h2>
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+<ol>
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+ <li>
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+ Open a web browser and navigate to your DD-WRT IP address</li>
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+ <li>
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+ Login when prompted</li>
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+ <li>
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+ Select the Administration tab</li>
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+ <li>
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+ Select the Backup sub tab</li>
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+ <li>
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+ Click Backup at the very bottom</li>
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+ <li>
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+ Save the nvrambak file somewhere safe</li>
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+ <li>
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+ Select the Services tab</li>
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+ <li>
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+ Select the VPN sub tab</li>
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+ <li>
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+ Scroll down and select enable next to OpenVPN under the OpenVPN Server/Daemon header</li>
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+ <li>
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+ Set the OpenVPN Settings as the following:
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+ <ol start="1" style="list-style-type: lower-alpha;">
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+ <li>
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+ Start Type: System</li>
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+ <li>
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+ Config as: Server</li>
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+ <li>
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+ Server mode: Router (TUN)</li>
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+ <li>
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+ Network: 10.10.28.0</li>
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+ <li>
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+ Netmask: 255.255.255.0</li>
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+ <li>
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+ Port: 1194</li>
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+ <li>
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+ Tunnel Protocol: TCP</li>
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+ <li>
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+ Encyption Cipher: AES-256 GCM</li>
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+ <li>
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+ Hash Algorithm: SHA256</li>
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+ <li>
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+ Advanced Options: Enable</li>
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+ <li>
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+ TLS Cipher: TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384</li>
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+ <li>
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+ Compression: Compress lz4-v2</li>
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+ <li>
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+ Redirect default Gateway: Disable</li>
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+ <li>
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+ Allow Client to Client: Enable</li>
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+ <li>
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+ Allow duplicate CN: Disable</li>
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+ <li>
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+ Tunnel MT setting: 1500</li>
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+ <li>
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+ Tunnel UDP MSS-Fix: Disable</li>
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+ </ol>
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+ </li>
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+ <li>
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+ Paste the contents of OpenVPN_Server.crt into the Public Server Cert field</li>
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+ <li>
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+ Paste the contents of CA_Chain.pem into the CA Cert field</li>
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+ <li>
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+ Paste the contents of OpenVPN_Server.pem into the Private Server Key field</li>
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+ <li>
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+ Paste the contents of dh2048.pem into the DH PEM field</li>
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+ <li>
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+ Paste the following into the Additional Config field:<br />
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+ push "route-gateway 10.10.27.27"<br />
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+ push "route 10.10.27.0 255.255.255.0"<br />
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+ push "dhcp-option DNS 10.10.27.1"<br />
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+ push "dhcp-option DNS 208.67.222.222"</li>
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+ <li>
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+ Note in the above:<br />
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+ route-gateway is the IP address of the internet gateway on your local network<br />
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+ route is the subnet of your local network<br />
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+ dhcp-option DNS sets DNS servers, in my case my domain controller and an OpenDNS server</li>
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+ <li>
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+ Click Save at the bottom</li>
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+ <li>
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+ Click Apply Settings</li>
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+ <li>
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+ Click the Administration tab</li>
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+ <li>
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+ Click the Command sub tab</li>
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+ <li>
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+ Paste the following into the Commands field<br />
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+ <p>
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+ iptables -t nat -I PREROUTING -p udp --dport 1194 -j ACCEPT<br />
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+ iptables -I INPUT -p udp --dport 1194 -j ACCEPT<br />
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+ iptables -t nat -I PREROUTING -p tcp --dport 1194 -j ACCEPT<br />
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+ iptables -I INPUT -p tcp --dport 1194 -j ACCEPT<br />
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+ iptables -I INPUT -i tun2 -j ACCEPT<br />
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+ iptables -I FORWARD -i tun2 -j ACCEPT<br />
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+ iptables -I FORWARD -o tun2 -j ACCEPT<br />
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+ iptables -t nat -A POSTROUTING -s 10.10.28.0/24 -o eth0 -j MASQUERADE</p>
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+ </li>
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+ <li>
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+ Click Save Firewall at the bottom</li>
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+ <li>
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+ Click the Management sub tab</li>
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+ <li>
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+ Click Reboot Router at the very bottom</li>
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+</ol>
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+<h2>
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+ Installing OpenVPN Client Software and Testing</h2>
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+<ol>
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+ <li>
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+ Download the OpenVPN software <a href="https://openvpn.net/community-downloads/" target="_blank">Download</a></li>
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+ <li>
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+ Run the installer with all the default values</li>
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+ <li>
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+ Click the Start button and search OpenVPN GUI</li>
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+ <li>
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+ Select OpenVPN GUI from the results to start the application</li>
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+</ol>
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+<h2>
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+ Creating the OpenVPN Client Profile</h2>
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+<ol>
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+ <li>
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+ Download the OVPN template <a href="https://drive.google.com/open?id=1cwgQfCoQmDOMbY1kW7JK4q07ijHdl37y" target="_blank">Download</a></li>
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+ <li>
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+ Rename the .ovpn template something meaningful</li>
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+ <li>
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+ Edit the .ovpn template replacing the following:<br />
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+ <p>
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+ <#replace with dynamic dns#> with a dynamic DNS or external IP address to your server<br />
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+ <#replace with CA chain#> with the contents of CA_Chain.pem<br />
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+ <#replace with client 1 cert #> with the contents of OpenVPN_Client #1.crt<br />
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+ <#replace with client 1 key #> with the contents of OpenVPN_Client #1.pk8</p>
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+ </li>
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+ <li>
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+ Save your changes</li>
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+ <li>
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+ Copy the .ovpn template to OpenVPN install directory/config</li>
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+ <li>
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+ Right click OpenVPN GUI in the system tray > Connect</li>
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+</ol>
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+ </div>
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+ </div>
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+ </body>
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+ </html>
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+
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