HostMonitor — Network Monitoring for Windows

Features

Everything you need to monitor your network

Built for sysadmins, developers, and home lab enthusiasts who need reliable, lightweight host monitoring on Windows.

Real-Time Status Grid

Monitor all your hosts in one glanceable table. Color-coded cells show available, timeout, and refused states at a glance.

Latency Charts & Stats

Per-host statistics window with min/avg/max latency sparklines. Historical data persisted in a local SQLite database.

Five Probe Protocols

ICMP, TCP, UDP, HTTP, and HTTPS. Protocol-aware UDP payloads for DNS, NTP, SNMP, OpenVPN, and IKEv2/IPSec.

Smart Alarms

Three alarm modes: fire on every outage, once per outage, or only after N consecutive failures to cut through noise.

Host Groups

Organize hosts into logical groups — Production, Staging, Dev, or any category that fits your infrastructure.

System Tray & Notifications

Minimize to tray and keep monitoring silently. Native Windows notifications pop up the moment a host goes down.

Six UI Themes

Blue, Green, Lavender, Amber, Slate, and System. Each follows your Windows light or dark mode; System also tracks your accent color.

7 Languages

English, German, Spanish, French, Italian, Polish, and Ukrainian — all bundled, no extra downloads required.

Local SQLite Storage

All history stays on your machine. No cloud, no sign-up, no subscriptions. Your data is entirely yours.

Screenshots

See it in action

The real application — monitoring grid, per-host statistics, target setup, and preferences. These shots follow your system theme.

Main monitoring window with host groups and per-protocol status columns

Main window — hosts grouped by role, with a status column per service and a rolling uptime percentage for each target.

Per-host statistics window showing a latency chart and probe history

Statistics window — per-service latency chart with min/avg/max, uptime counters, and the full check log. Drag on the chart to zoom.

Add New Target dialog with hostname, group, and service catalogue fields

Add New Target — name the host, drop it in a group, then add services from the catalogue. Scan interval and alarm mode can follow the global setting or be overridden per target.

Edit Target dialog listing the services configured for one host

Edit Target — every service on a host in one list, each with its port and protocol. Add or remove probes without losing the target's history.

Services and ports list dialog with the built-in service catalogue

Service catalogue — the built-in list of services and ports, editable. Add your own entries once and reuse them across every target.

Preferences dialog showing general options and alarm sound modes

Preferences — tray behaviour, notifications, uptime window, scan period, and the three alarm modes, all in one place.

Protocols

Five probe protocols. One tool.

From a simple ICMP ping to a full HTTP response-body check — HostMonitor covers the range of probes you actually need.

ICMP

Ping / Echo Request

Classic latency probe. Confirms basic IP reachability without requiring open ports.

TCP

TCP Port Connect

Non-blocking connect to any port with configurable timeout. Covers SSH, RDP, databases, SMTP, and more.

UDP

Protocol-Aware UDP Probes

Sends well-formed payloads for DNS, NTP, SNMP, OpenVPN, and IKEv2/IPSec — not a blind port knock.

HTTP / HTTPS

Verifies expected status codes and optionally matches a pattern in the response body. Catches broken apps that still have open TCP ports.

UDP Protocol Payloads

Port	Protocol	Payload
53	DNS	A-query for root zone
123	NTP	NTPv3 client request
161, 162	SNMP	SNMPv1 GetRequest
500	IKEv2 / IPSec	IKE_SA_INIT (AES-CBC-128)
1194	OpenVPN	P_CONTROL_HARD_RESET_V2
4500	IKEv2 NAT-T	Non-ESP marker + IKE_SA_INIT
any	Generic	Single zero byte