Title: GearBSD: a project to help automating your OpenBSD
Author: Solène
Date: 01 June 2021
Tags: gearbsd rex openbsd
Description: 

# Introduction

I love NixOS and Guix for their easy system configuration and easy
jumping from one machine to another by using your configuration file. 
To some extent, I want to make it possible to do so on OpenBSD with a
collection of parametrized Rex modules, allowing to configure your
system piece by piece from templates that you feed with variables.

Let me introduce you to GearBSD, my project to do so.

GearBSD gitlab page

# How to use

You need to clone https://tildegit.org/solene/gearbsd using git and you
also need to install Rex with pkg_add p5-Rex.

Use cd to enter into a directory like openbsd/pf (the only one module
at this time), edit the Rexfile to change the variables as you want and
run "doas rex configure" to apply.

Video example (asciinema recording)

# Example with PF

The PF module has a few variables, in TCPports and UDPports you can
list ports or ports ranges that will be allowed, if no ports are in the
list then the "pass" rules for that protocol won't be there.

If you want to enable nat on em0 for your wg0 interface, set "nat" to
1, "nat_from_interface" to "wg0" and "nat_to_interface" to "em0" and
the code will take care of everything, even enabling the sysctl for
port forwarding.

# More work required

It's only a start but I want to work hard on it to make OpenBSD a more
accessible system for everyone, and more pleasant to use.