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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>Setup Pi-Hole as a Recursive DNS Server with Unbound</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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+ <script type="text/javascript">
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+ $(function(){
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+ $('textarea').each(function(i,e){
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+ theTextarea = $(this);
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+ theTextarea.height((theTextarea[0].scrollHeight-5) +'px');
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+ });
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+
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+ $('li').each(function(i,e){
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+ if(!$(this).hasClass('noCheckbox')){
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+ var uuid = 'li_' + Math.floor(Math.random() * Math.floor(1000000)).toString() + '_' + i.toString();
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+ $(this).contents().wrap('<span id="'+ uuid +'"><label for="cb_'+ uuid +'"></label></span>');
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+ }
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+ theElement.empty();
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+ for(l=0;l<lines.length;l++){
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+ if($.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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+ theElement.append('<input type="image" src="images/clipboard.png" value="" class="copy-text" rel="copy_'+ i +'_'+ l +'" data-clipboard-text="'+ $.trim(lines[l].replace(/"/g, '"')) +'" /><span id="copy_'+ i +'_'+ l +'">'+ lines[l] +'</span>');
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+ } else {
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+ }
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+ $(document).on('click','input.copy-text',function(){
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+ theButton = $(this);
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+ $('input.copy-text').attr('src','images/clipboard.png');
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+ $('span.copy-animation,span.copy-animation-ps').removeClass('copy-animation copy-animation-ps');
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+ try {
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+ if($('#'+ theButton.attr('rel')).parent('div').hasClass('PS')){
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+ $('#'+ theButton.attr('rel')).addClass('copy-animation-ps');
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+ } else if($('#'+ theButton.attr('rel')).parent('div').hasClass('CMD')){
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+ } else {
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+ }
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+ } catch(err) {
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+ return false;
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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>Setup Pi-Hole as a Recursive DNS Server with Unbound</h1>
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+ </div>
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+ <div></div>
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+ <div id="content">
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+ <h2>Installing and Configuring Unbound</h2>
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+
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+<ol>
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+ <li>Run the following commands in a terminal window:
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+ <div class="codeBlock"># install unbound<br />
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+ sudo apt install unbound<br />
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+ # update root hints file<br />
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+ wget https://www.internic.net/domain/named.root -qO- | sudo tee /var/lib/unbound/root.hints<br />
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+ # edit unbound configuration<br />
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+ sudo nano /etc/unbound/unbound.conf.d/pi-hole.conf</div>
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+ </li>
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+ <li>Paste the following configuration into pi-hole.conf
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+ <p>server:<br />
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+ # If no logfile is specified, syslog is used<br />
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+ # logfile: "/var/log/unbound/unbound.log"<br />
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+ verbosity: 0</p>
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+
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+ <p> interface: 127.0.0.1<br />
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+ port: 5335<br />
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+ do-ip4: yes<br />
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+ do-udp: yes<br />
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+ do-tcp: yes</p>
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+
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+ <p> # May be set to yes if you have IPv6 connectivity<br />
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+ do-ip6: no</p>
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+
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+ <p> # You want to leave this to no unless you have *native* IPv6. With 6to4 and<br />
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+ # Terredo tunnels your web browser should favor IPv4 for the same reasons<br />
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+ prefer-ip6: no</p>
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+
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+ <p> # Use this only when you downloaded the list of primary root servers!<br />
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+ # If you use the default dns-root-data package, unbound will find it automatically<br />
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+ #root-hints: "/var/lib/unbound/root.hints"</p>
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+
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+ <p> # Trust glue only if it is within the server's authority<br />
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+ harden-glue: yes</p>
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+
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+ <p> # Require DNSSEC data for trust-anchored zones, if such data is absent, the zone becomes BOGUS<br />
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+ harden-dnssec-stripped: yes</p>
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+
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+ <p> # Don't use Capitalization randomization as it known to cause DNSSEC issues sometimes<br />
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+ # see https://discourse.pi-hole.net/t/unbound-stubby-or-dnscrypt-proxy/9378 for further details<br />
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+ use-caps-for-id: no</p>
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+
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+ <p> # Reduce EDNS reassembly buffer size.<br />
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+ # Suggested by the unbound man page to reduce fragmentation reassembly problems<br />
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+ edns-buffer-size: 1472</p>
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+
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+ <p> # Perform prefetching of close to expired message cache entries<br />
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+ # This only applies to domains that have been frequently queried<br />
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+ prefetch: yes</p>
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+
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+ <p> # One thread should be sufficient, can be increased on beefy machines. In reality for most users running on small networks or on a single machine, it should be unnecessary to seek performance enhancement by increasing num-threads above 1.<br />
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+ num-threads: 1</p>
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+
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+ <p> # Ensure kernel buffer is large enough to not lose messages in traffic spikes<br />
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+ so-rcvbuf: 1m</p>
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+
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+ <p> # Ensure privacy of local IP ranges<br />
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+ private-address: 192.168.0.0/16<br />
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+ private-address: 169.254.0.0/16<br />
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+ private-address: 172.16.0.0/12<br />
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+ private-address: 10.0.0.0/8<br />
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+ private-address: fd00::/8<br />
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+ private-address: fe80::/10</p>
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+ </li>
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+ <li>Press CTRL+O, Enter, CTRL+X to write the changes to pi-hole.conf</li>
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+ <li>Continue with the following commands in terminal
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+ <div class="codeBlock"># restart the unbound service<br />
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+ sudo service unbound restart<br />
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+ # test a DNS lookup via unbound<br />
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+ dig github.io @127.0.0.1 -p 5335</div>
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+ </li>
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+ <li>Back in the web browser, navigate back to the Pi-Hole web interface</li>
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+ <li>Log in if you are not already</li>
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+ <li>Select Settings > DNS</li>
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+ <li>Uncheck any of the previously selected upstream DNS servers</li>
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+ <li>Check the box next to Custom 1 (IPv4)</li>
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+ <li>Enter 127.0.0.1#5335 as the address</li>
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+ <li>Scroll down and click the Save button</li>
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+</ol>
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+
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+<h2>Testing the Changes</h2>
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+
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+<ol>
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+ <li>Open a new tab in the web browser and navigate to https://yahoo.com</li>
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+ <li>Go back into Pi-Hole and select Query Log from the left navigation</li>
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+ <li>Filter the results on www.yahoo.com</li>
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+ <li>You should see entries showing the DNS requests forwarding to localhost#5335</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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i12bretro