Wednesday, 29 July 2026 @ 15:01 UTC~4613,752154,724

PortFinder

packetThrower·packetThrower.PortFinder

Network switch port discovery tool using CDP / LLDP / MNDP.

PortFinder identifies which switch, switchport, and VLAN your machine is currently plugged into by listening for the discovery packets the switch is already broadcasting. No agent on the switch, no SNMP, no login — just a passive 30-second listen on the wire. Supported protocols: - LLDP (universal: Aruba, HP, Juniper, Extreme, Cisco, MikroTik) - CDP (Cisco) - MNDP (MikroTik RouterOS fallback) Ships a desktop GUI and a headless CLI in one binary. The CLI takes `portfinder capture --interface <NIC> --protocol LLDP [--json]`. Requires Npcap (with "Allow non-administrators to capture" enabled) for non-administrator capture.

winget install --id packetThrower.PortFinder --exact --source winget

Latest 4.1.4·July 15, 2026

Release Notes

What's Changed

  • Bump to 4.1.4 (86d3eed)
  • deps: bump gpui/gpui-component past async-tar CVE + wrap long tooltips (#65) (c5ed6af)
  • build(deps): bump actions/cache from 5 to 6 (#60) (fde733a)
  • build(deps): bump taiki-e/install-action from 2.82.2 to 2.83.2 (#63) (9b2c968)
  • docs: lifecycle screenshots + top-right nav pills (#64) (f54b491)
  • docs(deps): override js-yaml + esbuild past CVE-affected versions (bc9c666)
  • build(deps): bump astro from 6.2.1 to 6.4.6 in /docs-next (#56) (455b015)
  • build(deps): bump vedantmgoyal9/winget-releaser (#53) (c2e4a8d)
  • build(deps): bump actions/checkout from 6 to 7 (#57) (4deca53)
  • build(deps): bump softprops/action-gh-release from 3.0.0 to 3.0.1 (#58) (28755b8)
  • build(deps): bump taiki-e/install-action from 2.79.0 to 2.82.2 (#59) (45b78bf)
  • readme: note the Homebrew 6.0.0 tap-trust step (a2d02f7) Full Changelog: v4.1.3...v4.1.4

Installer type: wix

x64—B6A6AC8406A815A35FC4D15A3B7E5DEEF8450908FE07C5DB7B73E4D51EFD4CAA
arm64—9E81A57B800769330C99BC2F0A3F0374D06D4D70A4DAEA5C7476A63370A01BD1

Details

Homepage
https://packetthrower.github.io/PortFinder/
License
GPL-3.0
Publisher
packetThrower
Support
https://github.com/packetThrower/PortFinder/issues
Privacy Policy
https://github.com/packetThrower/PortFinder#privacy
Copyright
Copyright (C) Will Lehnertz
Moniker
portfinder

Tags

cdpdiscoverylldpmndpnetworknetworkingnpcappacket-capturepcapswitchvlan

Older versions (2)

4.1.3
x64—A69CD505FB15EC131213D6F5D3A2E235856C85187168235592DF77970FBE13AD
arm64—075EA66196A1F0EBBC2017C0BB226AECCF6307F80E87A7939237ED7A4B48962D
4.1.2
x64machine047052B992B90AB7BA189642FB9886A053B90F5CBB321EDE683EB34D158C567D
arm64machineD954FCD47944BCE2A7C2FBC6A47FEAC384D836ECCCE4A102E6071E59DAE4A0B7