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Looking for secure (and free) DNS? Quad 9 is your new best friend

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  • phenomlabundefined

    Those in the security space may already be aware of the secure DNS service provided by Quad9. For those who have not heard of this free service, Quad9 is a public Domain Name System (DNS) service that provides a more secure and privacy-focused alternative to traditional DNS services. DNS is the system that translates human-readable domain names (like www.google.com) into IP addresses that computers use to identify each other on the internet.

    Quad9 is known for its emphasis on security and privacy. It uses threat intelligence from various cybersecurity companies to block access to known malicious websites and protect users from accessing harmful content. When a user makes a DNS query, Quad9 checks the requested domain against a threat intelligence feed, and if the domain is flagged as malicious, Quad9 blocks access to it.

    One notable feature of Quad9 is its commitment to user privacy. Quad9 does not store any personally identifiable information about its users, and it does not sell or share user data.

    https://www.quad9.net/

    Users can configure their devices or routers to use Quad9 as their DNS resolver to take advantage of its security and privacy features. The DNS server addresses for Quad9 are usually 9.9.9.9 and 149.112.112.112.

    The name “Quad9” is derived from the service’s use of four DNS servers in different geographic locations to provide redundancy and improve reliability. Users can configure their devices or routers to use the Quad9 DNS servers, and doing so can offer an additional layer of protection against malware, phishing, and other online threats. It’s important to note that while Quad9 can enhance security, it is not a substitute for other security measures such as antivirus software and good internet security practices, and if you are not using these technologies already, then you are leaving yourself open to compromise.

    I’d strongly recommend you take a look at Quad9. Not only is it fast, but it seems to be extremely solid, and well thought out. If you’re using Cloudflare for your DNS, Quad9 is actually faster.

    Author of OGProxy, Swatch, Threaded, Card, and most of Sudonix's bugs…

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  • crazycellsundefined

    @phenomlab thanks for sharing. this will be very useful for me.

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  • phenomlabundefined

    @crazycells Agreed. I’m using it now, and have been all afternoon. Super stable and very secure.

    Author of OGProxy, Swatch, Threaded, Card, and most of Sudonix's bugs…

    1
  • phenomlabundefined

    I’ve been using this service for a couple of days now, and it’s made my internet access so much faster. That alone is a plus, and I never thought there would be a contender for Cloudflare in this area.

    Author of OGProxy, Swatch, Threaded, Card, and most of Sudonix's bugs…

    0

  • DownPWundefined

    Tutorial for secure emailing with personal domain,Cloudflare, virtualmin and postfix

    Unsolved Linux
    30
    3 Votes
    30 Posts
    435 Views
    phenomlabundefined

    @DownPW any update?

  • phenomlabundefined

    Facebook fined for forcing users to agree to personalised ads

    Privacy
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    2 Votes
    3 Posts
    188 Views
    phenomlabundefined

    @crazycells exactly. Not so long ago, we had the Cambridge Analytica scandal in the UK. Meta (Facebook) seem to be the ultimate “Teflon” company in the sense nothing seems to stick.

  • Mike Jonesundefined

    Securing javascript -> PHP mysql calls on Website

    Solved Security
    2
    1 Votes
    2 Posts
    265 Views
    phenomlabundefined

    @mike-jones Hi Mike,

    There are multiple answers to this, so I’m going to provide some of the most important ones here

    JS is a client side library, so you shouldn’t rely on it solely for validation. Any values collected by JS will need to be passed back to the PHP backend for processing, and will need to be fully sanitised first to ensure that your database is not exposed to SQL injection. In order to pass back those values into PHP, you’ll need to use something like

    <script> var myvalue = $('#id').val(); $(document).ready(function() { $.ajax({ type: "POST", url: "https://myserver/myfile.php?id=" + myvalue, success: function() { $("#targetdiv").load('myfile.php?id=myvalue #targetdiv', function() {}); }, //error: ajaxError }); return false; }); </script>

    Then collect that with PHP via a POST / GET request such as

    <?php $myvalue= $_GET['id']; echo "The value is " . $myvalue; ?>

    Of course, the above is a basic example, but is fully functional. Here, the risk level is low in the sense that you are not attempting to manipulate data, but simply request it. However, this in itself would still be vulnerable to SQL injection attack if the request is not sent as OOP (Object Orientated Programming). Here’s an example of how to get the data safely

    <?php function getid($theid) { global $db; $stmt = $db->prepare("SELECT *FROM data where id = ?"); $stmt->execute([$theid]); while ($result= $stmt->fetch(PDO::FETCH_ASSOC)){ $name = $result['name']; $address = $result['address']; $zip = $result['zip']; } return array( 'name' => $name, 'address' => $address, 'zip' => $zip ); } ?>

    Essentially, using the OOP method, we send placeholders rather than actual values. The job of the function is to check the request and automatically sanitise it to ensure we only return what is being asked for, and nothing else. This prevents typical injections such as “AND 1=1” which of course would land up returning everything which isn’t what you want at all for security reasons.

    When calling the function, you’d simply use

    <?php echo getid($myvalue); ?>

    @mike-jones said in Securing javascript -> PHP mysql calls on Website:

    i am pretty sure the user could just use the path to the php file and just type a web address into the search bar

    This is correct, although with no parameters, no data would be returned. You can actually prevent the PHP script from being called directly using something like

    <?php if(!defined('MyConst')) { die('Direct access not permitted'); } ?>

    then on the pages that you need to include it

    <?php define('MyConst', TRUE); ?>

    Obviously, access requests coming directly are not going via your chosen route, therefore, the connection will die because MyConst does not equal TRUE

    @mike-jones said in Securing javascript -> PHP mysql calls on Website:

    Would it be enough to just check if the number are a number 1-100 and if the drop down is one of the 5 specific words and then just not run the rest of the code if it doesn’t fit one of those perameters?

    In my view, no, as this will expose the PHP file to SQL injection attack without any server side checking.

    Hope this is of some use to start with. Happy to elaborate if you’d like.

  • phenomlabundefined

    Hacked because you didn't listen ?

    Blog
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  • phenomlabundefined

    What should an incident response exercise look like?

    Blog
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  • phenomlabundefined

    AI... A new dawn, or the demise of humanity ?

    Blog
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    +0
    109 Votes
    150 Posts
    12k Views
    phenomlabundefined

    @DownPW yes, very. Shocking that the US military actually thinks this is a good idea. I mean, without going all “Hollywood” in terms of The Terminator franchise, there is a serious risk to human life here.

  • phenomlabundefined

    Security, Or Just Obscurity?

    Blog
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  • phenomlabundefined

    Changing Passwords Regularly Actually Weakens Security

    Blog
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    248 Views
    No one has replied