/en/tags/network-probing/Recent content in Network Probing on Mi&Bee BlogHugo -- gohugo.ioen蓝宝石的傻话Thu, 23 Apr 2026 00:00:00 +0000/en/posts/iot/esp32-blackbox/Thu, 23 Apr 2026 00:00:00 +0000/en/posts/iot/esp32-blackbox/<h2 id="why">Why</h2> <p>I have several LANs in different locations around the city, roughly 10 km apart. To make these networks talk to each other, I used tools like NetBird, ZeroTier, and Cloudflare Tunnel to set up a cross-region virtual LAN.</p> <p>The network was set up, but how to ensure stability? After all, these tunnels traverse the public internet with varying link quality. The most direct approach is to use Prometheus&rsquo;s blackbox_exporter for probing — periodic HTTP requests, Pings, DNS queries — feeding results into a time-series database with alert rules, so problems are detected immediately.</p>