If you see this URL in your AdGuard Home Query Log as "Blocked" or "Filtered," congratulations—you have caught AdGuard blocking its own telemetry? No. That is a misconception.
Here are the three realistic scenarios for seeing this URL:
Seeing tb.rg.adguard.net/public.php in your DNS logs is the digital equivalent of hearing your burglar alarm beep when you open the door. It is not an intruder; it is the alarm confirming that the system is armed.
This URL is a diagnostic tool, a telemetry endpoint, and a failsafe mechanism rolled into one. It represents the ongoing war between privacy tools and data collectors. AdGuard uses this domain to ensure that when a tracker is blocked, your browser doesn't freeze, and AdGuard's developers can improve their software.
In summary:
As long as you downloaded AdGuard from the official website (adguard.com), tb.rg.adguard.net is a friend, not a foe. Keep it blocked, keep your filters updated, and enjoy your ad-free, private browsing experience. tb.rg adguard.net public.php
The URL tb.rg-adguard.net/public.php refers to a popular third-party web interface known as TechBench by WZT, which provides direct download links for official Microsoft Windows and Office ISO images.
While the site is not officially affiliated with Microsoft, it is widely considered safe and legitimate by the tech community, including Microsoft Most Valuable Professionals (MVPs) and independent advisors. What is tb.rg-adguard.net?
Created by a developer known as WZT, this tool acts as a front-end wrapper for Microsoft's own TechBench download servers. It simplifies the process of finding specific, often "hidden" or older versions of Windows and Office that are not easily accessible through the standard Media Creation Tool.
Direct Sourcing: When you start a download, the file is pulled directly from official Microsoft domains like software-download.microsoft.com or officecdn.microsoft.com.
Version Access: It provides access to various builds, including Windows 10, Windows 11, and even older server editions. If you see this URL in your AdGuard
No Tampering: Because the links point to official servers, the ISO files are original and have not been modified by the third-party site. How to Use the Interface
The public.php script presents a straightforward selection process:
TechBench by WZT (tb.rg-adguard.net/public.php) is a trusted, third-party interface used to download official Windows and Office ISO images directly from Microsoft servers. It is widely used by IT professionals for accessing legacy ISOs and bypassing the limitations of Microsoft's Media Creation Tool. For a discussion on the site's safety, see this Reddit thread Microsoft Learn Is This Site Legal? - Microsoft Q&A
Important warning:
Before using any unofficial download source, understand that rg-adguard.net is not an official Microsoft website. It is a third-party mirror that repackages official Microsoft links. While many tech enthusiasts consider it safe for obtaining original Microsoft ISOs (hashes match official MSDN/VLSC), use it at your own risk and always verify file hashes.
Below is a step-by-step guide to using tb.rg-adguard.net/public.php. As long as you downloaded AdGuard from the
Why would a legitimate ad blocker use a PHP script? Isn't PHP usually for web servers?
public.php is what is known as a "Canary token" or a "tracking beacon." Here is the paradox: AdGuard blocks trackers, but to block them effectively, they need to know what trackers look like.
Many advertising networks use scripts like pixel.php, track.php, or beacon.php to log:
AdGuard emulates this structure. However, tb.rg.adguard.net/public.php serves a specific function: Tag validation and redirection.
If you are a power user and want to verify this behavior:
If you do not wish to see these requests (though it is recommended to keep them for better privacy), you can disable the specific filter rules causing the redirect. Look for rules containing $redirect in the Tracking Protection filter list.
Security researchers use "honeypots"—fake trackers that trap malicious actors. If a piece of malware or a rogue ad script tries to send data to tb.rg.adguard.net (thinking it is a real ad server), the public.php script logs the IP of the malware server. This helps AdGuard update its blocklists.