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+# Internet Monitor
+
+## Hardware
+
+- [Olimex ESP32-POE](https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware)
+- [Olimex ESP32-POE-ISO](https://www.olimex.com/Products/IoT/ESP32/ESP32-POE-ISO/open-source-hardware)
+
+## Test procedure
+
+1. Check physical link
+   - Ethernet unplugged?
+2. Run DHCP / IPv4 config
+   - IP assigned?
+   - Subnet?
+   - Gateway?
+   - DNS server?
+3. Run SLAAC / IPv6 config
+   - IP assigned?
+   - Subnet?
+   - Gateway?
+   - DNS server?
+3. Test local Gateway
+   - Router reachable? IPv4, IPv6
+4. Routing/Uplink
+   - Ping 1.1.1.1, 8.8.8.8, 9.9.9.9
+   - Ping 2606:4700:4700::1111, 2001:4860:4860::8888, 2620:fe::fe
+5. DNS
+   - Resolve google.com, cloudflare.com, example.com
+   - Timeout?
+   - NXDOMAIN?
+6. S2S VPN
+   - Ping other side
+7. Packet throughput
+8. Measure latency
+9. Measure temperature inside rack
+
+## Display
+
+```
+🟢 ONLINE
+Latency: 23ms
+Packet loss: 4.2%
+IPv4: 192.168.0.123/24
+IPv6: 2001:d8::1234:5678:90ab:cdef/64
+Temperature: 42°C
+```
+
+## Future ideas
+
+- Prometheus endpoint
+- Test Wifi