Getting started with PHP and Dynamic DNS

Today we will explore the relationship between PHP and Dynamic DNS. So, first, we will explain what DDNS is and then the significance of PHP. The next step is to see where they meet each other and show how they perform.

Dynamic DNS (DDNS) – What is it?

Dynamic Domain Name System is sometimes known as Dynamic DNS (DDNS). It’s a fantastic approach to automatically and frequently update your name server. When IP addresses change, so do the A (IPv4), and AAAA (IPv6) records that are associated with them. You don’t have to spend the time and energy conducting this process manually.

Internet service providers frequently change client IP addresses (ISPs). Thus, they have a big problem managing them to ensure they don’t run out. An IP address is required for each device that connects to the network.

What does PHP signify?

The most used programming language on the internet is definitely PHP. It is applied to improve websites. Construct forums, picture galleries, surveys, and much more using PHP. You can also check information from a form and create username and password login pages. If a web page’s URL ends in PHP, the author likely included some computer code to spice up the boring HTML.

As a server-side language, PHP is well-known. This is due to the fact that the PHP is executed on the computer from which you accessed the page, not on your own. You are then given the results, which are shown in your browser. ASP, Python, and Perl are a few other scripting languages you may be familiar with.

PHP and Dynamic DNS – Where do they meet each other?

We explain what that two terms imply. But can we use them at the same time? Yes. But how? You could set up Dynamic DNS on your OS with PHP. So yes, you need to understand this programming language and how the Domain Name System functions. To do it, you need:

  • a DNS server that answers queries for your dynamic zone (in this case, dyn.domain.com)
  • a PHP-capable HTTP server (could be the same DNS server)

How does it operate?

  1. The HTTP server receives an HTTP request from the (dynamic IP) client.
  2. Through the nsupdate utility, the PHP script processes the request, verifies the user and password, and sends a DNS update request.
  3. The DNS server receives the update request from the HTTP server and updates the DNS zone, assigning the new IP address to the hostname

Build your own Dynamic DNS with PHP

You only need a web space with PHP enabled to set up your own DDNS-like service easily and securely. Instead of a genuine DNS record, you will receive an ever-advancing forward.

Put a script similar to this one:
<html>

<?php

$log = fopen(“ip.php”,”w”);

  $ip = getenv(“REMOTE_ADDR”);

  fputs($log,$ip);

fclose($log);

echo “DDNS updated at ” . date(“D j. M Y – h:i a”);

?>

<a href=”https://www.example/index.php?s=Create-a-dynamic-DNS-service”>Setup manual</a>

</html>

in example.php on your website. Because every access will update the stored IP, you should secure it by putting it in a path.

Downloading that file now will:

  • Put your IP address in “ip.php”
  • A log file containing the timestamp of your sync will be what you download.

Leave a Reply

Your email address will not be published.