Ruroco – like port knocking, but better
Hey there HN! ruroco (RUn RemOte COmmand) is a tool that lets you execute commands on a server by sending UDP packets (instead of knocking on ports). the tool consist of 3 binaries: - client -> runs on your notebook/computer and sends the UDP packets - server -> receives the UDP packets and makes sure that they are valid - commander -> runs the command encoded by the data of the UDP packet if it's valid The commands are configured on the server side, so the client does not define what is going to be executed, it only picks from existing commands. I use this tool to open up the SSH port…
In plain words
Ruroco is a remote command execution tool that uses UDP packets instead of traditional port knocking. It consists of three components: a client that sends packets from a user's computer, a server that validates them, and a commander that executes pre-configured commands. The server defines available commands, and clients select from existing options rather than defining new ones. A common use case is dynamically opening SSH ports only for the connecting user's IP address, making the port appear closed to others.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hey there HN! ruroco (RUn RemOte COmmand) is a tool that lets you execute commands on a server by sending UDP packets (instead of knocking on ports). the tool consist of 3 binaries: - client -> runs on your notebook/computer and sends the UDP packets - server -> receives the UDP packets and makes sure that they are valid - commander -> runs the command encoded by the data of the UDP packet if it's valid The commands are configured on the server side, so the client does not define what is going to be executed, it only picks from existing commands. I use this tool to open up the SSH port on my server via ufw, but only for the IP address from where I'm connecting, so the SSH port appears closed for everyone else, except me. This is my very first "real" rust project, so any feedback is highly appreciated :) Enjoy!
More life & fun this month
the category →- TL
Life & fun · 10d ago · louisabraham.github.io
Photosynthesis fires two of your iPhone
Life & fun · 28d ago · photosynthesis.camera
SoloUno▲310Take control of hair pulling, nail biting & skin picking
Life & fun · 28d ago · solouno.io
Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 26d ago · baselashraf81.github.io
Launched alongside, August 2024
the whole month →
- IY
Life & fun · 2024 · ytch.xyz
- IA
Hey there HN! We’re Joe and Stopa, and today we’re open sourcing InstantDB, a client-side database that makes it easy to build real-time and collaborative apps like Notion and Figma. Building modern apps these days involves a lot of schleps. For a basic CRUD app you need to spin up servers, wire up endpoints, integrate auth, add permissions, and then marshal data from the backend to the frontend and back again. If you want to deliver a buttery smooth user experience, you’ll need to add optimistic updates and rollbacks. We do these steps over and over for every feature we build, which can…
Dev tools · 2024 · github.com