DNS-BLM checks if your domains are flagged as malicious on blocklists.

Open, vendor-neutral specification for portable synthetic monitoring checks. Define checks once, run anywhere. Supports HTTP, TCP, DNS, TLS, domain, and browser automation checks. Apache 2.0 licensed.

High-performance self-hosted uptime monitoring built in Rust. Fast, lightweight, and designed for full ownership of your infrastructure.

DNS Monitor is a customizable tool that detects changes to critical DNS records such as MX, SPF, DKIM, and DMARC, providing instant notifications via Pushover and Telegram to help prevent unauthorized modifications and enhance both email and general DNS security.

Self-hosted internet uptime monitor. Logs every connection drop with its cause, duration, and exact timestamp; live dashboard, Discord alerts, and ISP-ready reports. Pure Python, zero dependencies, perfect for a Raspberry Pi.

Home Assistant integration for dnsdist

Dns queries and responses with scapy

ENG.A Python-based script that monitors AdGuardHome DNS queries and sends notifications to a Discord webhook./SVK: Skript v Pythone, ktorý sleduje DNS požiadavky v AdGuardHome a odosiela upozornenia na Discord webhook.

Discord bot for large-scale website monitoring. Tracks content changes, DNS records, IP addresses, response times, status codes, and captures screenshots. Sends real-time alerts and supports concurrent monitoring of 100+ sites efficiently.

Single-binary, local-first DNS forwarder for Pi homelabs with per-device query logs, SQLite storage, domain dashboards, and no cloud telemetry.

Passive DNS threat monitoring tool with OSINT integration and Entropy-based detection.

Watcher is a conservative asset monitoring CLI for tracking DNS changes, open ports, web services, discovered URLs, and lightweight exposure risks over time.

DNS propagation monitor — watch your records converge across the globe via Telegram

A Google Apps Script that monitors MX records for your domains and sends alerts via Google Chat webhook when changes are detected.

Local-first Chrome extension that detects DNS changes on monitored domains and warns before you trust a site again.

API and integration profile for DNS Check.

Comprehensive Zabbix 7.4 template for Windows DNS Server

Linux eBPF/libbpf CO-RE daemon for per-process network attribution: domains, bytes, exe hashes, alerts, SQLite WAL, and live web UI.

Public OpenAPI 3.1 specification for the Visual Sentinel REST API (six-layer website monitoring)

Continuous attack-surface change monitor for bug bounty & security teams — diffs your authorized targets on a schedule and alerts the moment a new subdomain, live host, subdomain-takeover risk, or DNS change appears. Single Go binary; runs free in a GitHub Action.