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At first glance, it looks like a telemetry or tracking domain. The "tb" prefix often signals "Telemetry" or "Test Bench," while "adguard.net" points directly to the popular ad-blocking and privacy software company. This combination can cause confusion, leading many users to ask: Is this domain malicious? Should I block it? Why is my device contacting it hundreds of times a day? tb-rg adguard.net
This is normal behavior. However, if the volume is excessive (e.g., every 2 seconds), check your VPN settings for an overly aggressive “network change detection” or “keep-alive interval.” You can also adjust logging levels inside the AdGuard VPN app. Do not block the domain – this will cause VPN connection drops or prevent the VPN from starting altogether. Issue 2: Domain Shows as “Blocked” in AdGuard Home 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. Stay private, stay curious, and keep filtering
You have enabled a custom blocklist that overblocks legitimate domains. Common culprits are oisd-full , EasyPrivacy with aggressive extensions, or community-maintained lists that flag any subdomain starting with tb- . At first glance, it looks like a telemetry
Your upstream DNS provider (e.g., Cloudflare 1.1.1.1, Google 8.8.8.8) may be having issues, or a firewall/DPI box is blocking the domain.
AdGuard VPN clients, by design, perform frequent health checks and configuration refreshes. This ensures that if a VPN server goes down, your client can automatically switch to a new one without dropping your connection.