Ping
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The Ping sensor sends an ICMP echo request to a host and checks that it answers. Use it to know that a server, a router or a VPN endpoint is reachable — or, reversed, that a host stays unreachable.
In the wizard: Network → Host availability.
Settings#
| Setting | Description |
|---|---|
| Host | Hostname, domain name or IP address — see Hosts and addresses. |
| Timeout | Time allowed for the answer, in milliseconds. |
| Up if ping succeeds | On (default): healthy when the host answers. Off: healthy when it does not answer. |
When is it healthy?#
When the host answers within the timeout (or, reversed, when it does not).
Good to know#
- Many hosts and firewalls drop ICMP on purpose. If a host is reachable but never answers ping, monitor a port instead.
- From the public agent, only public addresses can be pinged. Internal hosts need a private agent in the same network.
- Network discovery proposes a Ping sensor for each host it finds.