The website tb.rg-adguard.net (often referred to as TechBench by WZT) is a popular third-party web service that provides direct download links for Microsoft Windows and Office ISO images directly from Microsoft's own servers.
Blocking it will not improve your privacy or security. It will only break your AdGuard VPN client, forcing it to repeatedly retry failed connections, which can waste battery and CPU cycles. If you do not use AdGuard VPN, you will never see this domain in your logs. tb-rg adguard.net
: Users should be wary of third-party ads on the site which may promote "Potentially Unwanted Products" (PUPs), even though the software download links themselves are legitimate. Microsoft Learn Usage Tips : When downloading Windows, choosing "Windows Final" The website tb
Symptom: You see tb-rg.adguard.net with a red “Blocked” status in your DNS logs. Your AdGuard VPN might behave erratically or fail to connect. If you do not use AdGuard VPN, you
Your router or a device on your network is using AdGuard DNS services. The query is likely for telemetry, filter updates, or safe browsing lookups.
The string tb-rg adguard.net is a textbook example of how modern DNS infrastructure can confuse even experienced network users. It is not a malware domain, not a tracking supercookie, and not a hack attempt. Instead, it is almost certainly a legitimate dynamic subdomain used by AdGuard’s DNS filtering and telemetry systems.