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+### Setup OpenVPN server
+to use your Pi-hole as DNS server
+
+First, get the IP of your `tun0` interface:
+```
+ifconfig tun0 | grep 'inet addr'
+```
+In my case this returns 
+<pre>
+<b>inet addr:10.8.0.1</b>  P-t-P:10.8.0.1  Mask:255.255.255.0
+</pre>
+
+Afterwards, change your settings in `/etc/openvpn/server.conf` from
+```
+push "dhcp-option DNS 8.8.8.8"
+```
+to
+<pre>
+push "dhcp-option DNS <b>10.8.0.1</b>"
+</pre>
+(where you might have to replace the IP if you found something different in the previous step)
+
+Finally, restart your OpenVPN server.
+```
+sudo service openvpn restart
+```
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