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        <title>Setting Up DD-WRT OpenVPN Server and Certificate Creation</title>
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            <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>
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