Comprehensive on-demand OSINT to analyze a website's security, architecture, and tech stack.
34.7k stars2.8k forksMITlast commit Actively maintained
3 self-hosted MXToolbox Open Port Check alternatives
Online utility that checks if a specific TCP port on a host or IP is open and reachable from the public internet, used for diagnosing firewall rules, network connectivity, and mail server accessibility.
Alternatives to MXToolbox Open Port Check
MyIP (IPCheck.ing) is an open-source web IP toolbox that detects local/public IPs, runs DNS leak and WebRTC checks, speed/latency/MTR tests, availability and whois lookups.
11.8k stars1.2k forksMITlast commit Actively maintained
Open-source API and web interface to test TCP port availability for hostnames and IPs. Docker-ready, minimal dependencies, and exposes Prometheus metrics for monitoring.
195 stars8 forksGPL-3.0last commit Actively maintained
What replacing MXToolbox Open Port Check actually involves
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 3 of 3 shipped a commit in the last six months. Licences in this list: MIT, GPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in Network Security (VPN, Firewall, WAF).
