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0017: Setting Up DD-WRT OpenVPN Server and Certificate Creation

i12bretro 4 年之前
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+    <html lang="en" xmlns="http://www.w3.org/1999/xhtml">
+      <head>
+        <title>Setting Up DD-WRT OpenVPN Server and Certificate Creation</title>
+        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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+        <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>Setting Up DD-WRT OpenVPN Server and Certificate Creation</h1>
+          </div>
+          <div></div>
+          <div id="content">
+          <h2>
+	Create Required Certificates</h2>
+<ol>
+	<li>
+		Launch XCA</li>
+	<li>
+		Open the PKI database if it is not already (File &gt; 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: OpenVPN Server<br />
+			countryName: US<br />
+			stateOrProvinceName: Virginia<br />
+			localityName: Northern<br />
+			organizationName: i12bretro<br />
+			organizationUnitName: i12bretro Certificate Authority<br />
+			commonName: vpn.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>
+		Set the Type dropdown to End Endity</li>
+	<li>
+		Check the box next to Subject Key Identifier</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 and Key Encipherment</li>
+	<li>
+		Under Extended Key Usage select TLS Web Server Authentication</li>
+	<li>
+		Click the Netscape tab</li>
+	<li>
+		Deselect all options and clear the Netscape Comment field</li>
+	<li>
+		Click OK to create the certificate</li>
+	<li>
+		Click on the Certificates tab, right click on your Intermediate CA certificate again</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: OpenVPN Client #1<br />
+			countryName: US<br />
+			stateOrProvinceName: Virginia<br />
+			localityName: Northern<br />
+			organizationName: i12bretro<br />
+			organizationUnitName: i12bretro Certificate Authority<br />
+			commonName: VPN Client 1</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>
+		Set the Type dropdown to End Endity</li>
+	<li>
+		Check the box next to Subject Key Identifier</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 Agreement</li>
+	<li>
+		Under Extended Key Usage select TLS Web Client Authentication</li>
+	<li>
+		Click the Netscape tab</li>
+	<li>
+		Deselect all options and clear the Netscape Comment field</li>
+	<li>
+		Click OK to create the certificate</li>
+	<li>
+		On the Certificates tab, click the OpenVPN Server certificate</li>
+	<li>
+		Select Extra &gt; Generate DH Parameter</li>
+	<li>
+		Type 2048 for DH parameter bits</li>
+	<li>
+		Click OK</li>
+	<li>
+		Select a location for dh2048.pem and click Save</li>
+</ol>
+<h2>
+	Exporting Required Files for OpenVPN</h2>
+<ol>
+	<li>
+		In XCA, click on the Certificates tab</li>
+	<li>
+		Right click the Intermediate CA certificate &gt; Export &gt; File</li>
+	<li>
+		Set the file name with a .pem extension and verify the export format is PEM chain (*.pem)</li>
+	<li>
+		Click OK</li>
+	<li>
+		Right click the OpenVPN Server certificate &gt; Export &gt; File</li>
+	<li>
+		Set the file name with a .crt extension and verify the export format is PEM (*.crt)</li>
+	<li>
+		Click OK</li>
+	<li>
+		Right click the OpenVPN Client #1 certificate &gt; Export &gt; File</li>
+	<li>
+		Set the file name with a .crt extension and verify the export format is PEM (*.crt)</li>
+	<li>
+		Click OK</li>
+	<li>
+		Click on the Private Keys tab</li>
+	<li>
+		Right click the OpenVPN Server key &gt; Export &gt; File</li>
+	<li>
+		Set the file name with a .pk8 extension and verify the export format is PKCS #8 (*.pk8)</li>
+	<li>
+		Click OK</li>
+	<li>
+		Right click the OpenVPN Client #1 key&gt; Export &gt; File</li>
+	<li>
+		Set the file name with a .pk8 extension and verify the export format is PKCS #8 (*.pk8)</li>
+	<li>
+		Click OK</li>
+</ol>
+<h2>
+	Setting Up OpenVPN Server in DD-WRT</h2>
+<ol>
+	<li>
+		Open a web browser and navigate to your DD-WRT IP address</li>
+	<li>
+		Login when prompted</li>
+	<li>
+		Select the Administration tab</li>
+	<li>
+		Select the Backup sub tab</li>
+	<li>
+		Click Backup at the very bottom</li>
+	<li>
+		Save the nvrambak file somewhere safe</li>
+	<li>
+		Select the Services tab</li>
+	<li>
+		Select the VPN sub tab</li>
+	<li>
+		Scroll down and select enable next to OpenVPN under the OpenVPN Server/Daemon header</li>
+	<li>
+		Set the OpenVPN Settings as the following:
+		<ol start="1" style="list-style-type: lower-alpha;">
+			<li>
+				Start Type: System</li>
+			<li>
+				Config as: Server</li>
+			<li>
+				Server mode: Router (TUN)</li>
+			<li>
+				Network: 10.10.28.0</li>
+			<li>
+				Netmask: 255.255.255.0</li>
+			<li>
+				Port: 1194</li>
+			<li>
+				Tunnel Protocol: TCP</li>
+			<li>
+				Encyption Cipher: AES-256 GCM</li>
+			<li>
+				Hash Algorithm: SHA256</li>
+			<li>
+				Advanced Options: Enable</li>
+			<li>
+				TLS Cipher: TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384</li>
+			<li>
+				Compression: Compress lz4-v2</li>
+			<li>
+				Redirect default Gateway: Disable</li>
+			<li>
+				Allow Client to Client: Enable</li>
+			<li>
+				Allow duplicate CN: Disable</li>
+			<li>
+				Tunnel MT setting: 1500</li>
+			<li>
+				Tunnel UDP MSS-Fix: Disable</li>
+		</ol>
+	</li>
+	<li>
+		Paste the contents of OpenVPN_Server.crt into the Public Server Cert field</li>
+	<li>
+		Paste the contents of CA_Chain.pem into the CA Cert field</li>
+	<li>
+		Paste the contents of OpenVPN_Server.pem into the Private Server Key field</li>
+	<li>
+		Paste the contents of dh2048.pem into the DH PEM field</li>
+	<li>
+		Paste the following into the Additional Config field:<br />
+		push &quot;route-gateway 10.10.27.27&quot;<br />
+		push &quot;route 10.10.27.0 255.255.255.0&quot;<br />
+		push &quot;dhcp-option DNS 10.10.27.1&quot;<br />
+		push &quot;dhcp-option DNS 208.67.222.222&quot;</li>
+	<li>
+		Note in the above:<br />
+		route-gateway is the IP address of the internet gateway on your local network<br />
+		route is the subnet of your local network<br />
+		dhcp-option DNS sets DNS servers, in my case my domain controller and an OpenDNS server</li>
+	<li>
+		Click Save at the bottom</li>
+	<li>
+		Click Apply Settings</li>
+	<li>
+		Click the Administration tab</li>
+	<li>
+		Click the Command sub tab</li>
+	<li>
+		Paste the following into the Commands field<br />
+		<p>
+			iptables -t nat -I PREROUTING -p udp --dport 1194 -j ACCEPT<br />
+			iptables -I INPUT -p udp --dport 1194 -j ACCEPT<br />
+			iptables -t nat -I PREROUTING -p tcp --dport 1194 -j ACCEPT<br />
+			iptables -I INPUT -p tcp --dport 1194 -j ACCEPT<br />
+			iptables -I INPUT -i tun2 -j ACCEPT<br />
+			iptables -I FORWARD -i tun2 -j ACCEPT<br />
+			iptables -I FORWARD -o tun2 -j ACCEPT<br />
+			iptables -t nat -A POSTROUTING -s 10.10.28.0/24 -o eth0 -j MASQUERADE</p>
+	</li>
+	<li>
+		Click Save Firewall at the bottom</li>
+	<li>
+		Click the Management sub tab</li>
+	<li>
+		Click Reboot Router at the very bottom</li>
+</ol>
+<h2>
+	Installing OpenVPN Client Software and Testing</h2>
+<ol>
+	<li>
+		Download the OpenVPN software <a href="https://openvpn.net/community-downloads/" target="_blank">Download</a></li>
+	<li>
+		Run the installer with all the default values</li>
+	<li>
+		Click the Start button and search OpenVPN GUI</li>
+	<li>
+		Select OpenVPN GUI from the results to start the application</li>
+</ol>
+<h2>
+	Creating the OpenVPN Client Profile</h2>
+<ol>
+	<li>
+		Download the OVPN template <a href="https://drive.google.com/open?id=1cwgQfCoQmDOMbY1kW7JK4q07ijHdl37y" target="_blank">Download</a></li>
+	<li>
+		Rename the .ovpn template something meaningful</li>
+	<li>
+		Edit the .ovpn template replacing the following:<br />
+		<p>
+			&lt;#replace with dynamic dns#&gt; with a dynamic DNS or external IP address to your server<br />
+			&lt;#replace with CA chain#&gt; with the contents of CA_Chain.pem<br />
+			&lt;#replace with client 1 cert #&gt; with the contents of OpenVPN_Client #1.crt<br />
+			&lt;#replace with client 1 key #&gt; with the contents of OpenVPN_Client #1.pk8</p>
+	</li>
+	<li>
+		Save your changes</li>
+	<li>
+		Copy the .ovpn template to OpenVPN install directory/config</li>
+	<li>
+		Right click OpenVPN GUI in the system tray &gt; Connect</li>
+</ol>
+          </div>
+        </div>
+      </body>
+    </html>
+