#port-knocking #firewall #nf-tables

letmein-fwproto

Authenticated port knocking - Firewall backend communication protocol

18 stable releases (8 major)

11.0.0 Oct 11, 2025
10.4.0 Aug 9, 2025
10.3.0 Jul 13, 2025
10.0.1 Feb 12, 2025
3.0.0 Jul 30, 2024

#1845 in Authentication


Used in 2 crates

MIT/Apache

120KB
2.5K SLoC

This crate implements the firewall socket protocol for communication between the letmeind and letmeinfwd daemons.

Serializing messages to a raw byte stream and deserializing raw byte stream to a message is implemented here.


letmein - Authenticated port knocking

Homepage

Git repository

Github repository

This is a library crate for the letmein application.

License

Copyright (c) 2024 Michael Büsch m@bues.ch

Licensed under the Apache License version 2.0 or the MIT license, at your option.

Dependencies

~4–16MB
~126K SLoC