Ping
The Ping (ICMP) checker measures basic network reachability for the addresses behind a service. It sends a small number of ICMP echo requests to each A/AAAA address and reports whether the target replied, its average round-trip time (RTT), the observed packet-loss ratio, and whether at least one IPv6 address answered.
Scope: service-level. It attaches to services of type abstract.Server (a subdomain that publishes A/AAAA records) and is configured from that service’s Checks tab.
What it checks
| Rule | Verifies | Warn / Critical conditions |
|---|---|---|
ping.reachable |
Every target replied to at least one ICMP probe. | Critical when a target never replies. |
ping.rtt |
Average round-trip time stays within thresholds. | Warning above the warning RTT, Critical above the critical RTT. |
ping.ipv6_reachable |
At least one IPv6 target replied to an ICMP probe. | Warning when no IPv6 address answers. |
ping.packet_loss |
Packet-loss ratio stays within thresholds. | Warning above the warning loss ratio, Critical above the critical loss ratio. |
Options
| Option | Meaning | Default |
|---|---|---|
Warning RTT threshold (ms) (warningRTT) |
Average RTT above which the check warns. | 100 |
Critical RTT threshold (ms) (criticalRTT) |
Average RTT above which the check is critical. | 500 |
Warning packet loss threshold (%) (warningPacketLoss) |
Packet-loss ratio above which the check warns. | 10 |
Critical packet loss threshold (%) (criticalPacketLoss) |
Packet-loss ratio above which the check is critical. | 50 |
Number of pings to send (count) |
ICMP echo requests sent per target. | 5 |
In happyDomain
This is a service-level checker: configure it from the Checks tab of the Server service on the relevant subdomain. Its short default interval makes it well suited to lightweight, frequent reachability monitoring. For the general workflow of configuring and reading checks, see /en/pages/checks/.