this is great!
i had to tweak the config file on macos because it was using some weird interface (utun4) instead of en0. otherwise awesome tool, i am definitely going to be using this more often.
I've been working on a LAN discovery tool with a Terminal User Interface (TUI) written entirely in Go.
It's called Whosthere, and it's designed to help you explore devices on your local network without requiring elevated privileges.
- Daemon mode with a simple HTTP API to fetch devices
- Configurable theming and behavior via a YAML config file
Why I built it:
Mainly to learn, I've been programming in Go for about a year now and wanted to combine learning Go with learning more about networking in one single project. I've always been a big fan of TUI applications like lazygit, k9s, and dive. And then the idea came to build a TUI application that shows devices on your LAN. I am by no means a networking expert, but it was fun to figure out how ARP works, and discovery protocols such as mDNS and SSDP.
Example usage:
---
# install via HomeBrew
brew tap ramonvermeulen/whosthere
brew install whosthere
# or with go install
go install github.com/ramonvermeulen/whosthere@latest
# run as TUI
whosthere
# run as daemon
whosthere daemon --port 8080
---
I'd love to hear your feedback, if you have ideas for additional features or improvements that is highly appreciated! Current platform support is Linux and MacOS.
It says 'Open ports: (None)' for all devices on my network, despite there being open ports on many of them (MacOS Tahoe 26.2 / installed via go)
this is great! i had to tweak the config file on macos because it was using some weird interface (utun4) instead of en0. otherwise awesome tool, i am definitely going to be using this more often.
I've been working on a LAN discovery tool with a Terminal User Interface (TUI) written entirely in Go. It's called Whosthere, and it's designed to help you explore devices on your local network without requiring elevated privileges.
It works by combining several discovery methods:
- mDNS and SSDP scanning
- ARP cache reading (after triggering ARP resolution via TCP/UDP sweeps)
- OUI lookups to identify device manufacturers
It also includes:
- A fast, keyboard-driven TUI (powered by tview)
- An optional built-in port scanner
- Daemon mode with a simple HTTP API to fetch devices
- Configurable theming and behavior via a YAML config file
Why I built it:
Mainly to learn, I've been programming in Go for about a year now and wanted to combine learning Go with learning more about networking in one single project. I've always been a big fan of TUI applications like lazygit, k9s, and dive. And then the idea came to build a TUI application that shows devices on your LAN. I am by no means a networking expert, but it was fun to figure out how ARP works, and discovery protocols such as mDNS and SSDP.
Example usage:
---
# install via HomeBrew brew tap ramonvermeulen/whosthere brew install whosthere
# or with go install go install github.com/ramonvermeulen/whosthere@latest
# run as TUI whosthere
# run as daemon whosthere daemon --port 8080
---
I'd love to hear your feedback, if you have ideas for additional features or improvements that is highly appreciated! Current platform support is Linux and MacOS.