---
title: "ICMP Monitor"
description: "The ICMP Monitor checks whether a host is reachable on the network. This is ideal for infrastructure components that do not expose HTTP endpoints (e.g. routers, firewalls, VPN gateways, databases, or internal services)."
---

## How it works

- We send ICMP echo requests (“ping”) to your **hostname**.
- The monitor is considered healthy when the target responds within the configured timeout.
- We record latency and detect sustained reachability problems.

## Configuration

### Basic settings

- **Name**: A human-friendly label.
- **Hostname**: Hostname or IP address (no protocol, no path).
- **Check interval**: How often to check.
- **Timeout**: How long to wait for a response.
- **Status**:
  - `active`: checks run normally.
  - `maintenance`: checks still run, but alerting may be dampened depending on alert logic.
  - `disabled`: checks do not run.

### Monitoring locations

ICMP checks run from our monitoring locations.

- If you set **Allowed Check Countries** on the monitor, checks run only from matching locations.
- If the monitor has no restrictions, (if configured) the **customer-level allowed countries** apply.