Connection Monitor
Probes a host on a fixed interval and records every drop. bfunc.cc
- Uptime
- —
- Checks
- 0
- Drops
- 0
- Avg
- —
- Elapsed
- 0:00
Timeline
Events
No connection drops recorded.
How this works. Browsers cannot send ICMP pings, and they cannot read a cross-origin response from google.com. So this issues a no-cors request to a tiny endpoint and times it: if the request completes, the network is up; if it fails or times out after 8s, it is down. The response body is opaque, which is fine — reachability and round-trip time are all we need.
Latency includes DNS, TCP and TLS on the first request, so the first reading usually runs high. Background tabs get their timers throttled by the browser, so keep this tab visible for an accurate record. A captive portal that intercepts traffic can look like a working connection here.