WireGuard Configuration Generator

A command-line tool for managing WireGuard VPN interfaces and clients. It helps you set up and maintain a WireGuard VPN server, generate client configurations, and render system configuration files for both systemd-networkd and wg-quick.

Motivation

Managing WireGuard configurations by hand gets tedious fast - generating key pairs, tracking IP assignments, keeping server and client configs in sync. This tool was born out of a need to manage a home network VPN where family members and devices come and go. Instead of editing config files and juggling keys manually, wg-gen keeps everything in a local SQLite database and generates correct, ready-to-use configurations with a single command.

Features

• Create and manage WireGuard interfaces
• Add and remove VPN clients
• Generate configuration files for WireGuard clients
• Export client configuration as QR codes
• Generate systemd-networkd configuration
• Generate wg-quick configuration
• Manage client IP addressing automatically
• Support for both IPv4 and IPv6
• SQLite-based persistent storage

Installation

Prerequisites

• Python 3.10+
• uv package manager

Step 1: Install uv

pip install uv

On Ubuntu/Debian, where system-managed Python may block pip install, add --break-system-packages:

pip install uv --break-system-packages

Step 2: Install wg-gen

uv tool install wg-gen

This installs wg-gen into an isolated environment and makes the wg-gen command available globally.

Step 3: Verify

wg-gen --help

Upgrading

uv tool upgrade wg-gen

Install from source

uv tool install git+https://github.com/mosquito/wg-gen.git

Usage

Basic Commands

# List available commands
wg-gen --help

# Create a new WireGuard interface
wg-gen interface add wg0 --ipv4 10.0.0.1/24 --ipv6 fd00::1/64 --endpoint vpn.example.com:51820 --listen-port 51820

# List all interfaces
wg-gen interface list

# Add a new client to an interface
wg-gen client add wg0 laptop

# Generate client configuration with QR code
wg-gen client add wg0 phone --qr

# List all clients
wg-gen client list

# Remove a client
wg-gen client remove wg0 phone

# Generate systemd-networkd configuration by default to /etc/systemd/network
wg-gen render systemd

# If you want specific output directory
wg-gen render systemd --output ~/test/networkd

# Generate wg-quick configuration by default to /etc/wireguard
wg-gen render wgquick

# If you want specific output directory
wg-gen render wgquick --output ~/wg-quick

Configuration Options

Interface Configuration

When adding a new interface, the following options are available:

wg-gen interface add <interface_name> [OPTIONS]

Client Configuration

When adding a new client, the following options are available:

wg-gen client add <interface_name> <client_alias> [OPTIONS]

How It Works

1. The tool maintains a SQLite database of interfaces and clients
2. When adding an interface, it generates WireGuard keys and stores the configuration
3. When adding a client, it assigns the next available IP addresses from the interface's subnet
4. Client configurations include private keys, server endpoint, and allowed IPs
5. The render commands output configuration files for various init systems

Example Setup

Create a WireGuard Server

# Create interface with IPv4 and IPv6 subnets
wg-gen interface add wg0 \
  --ipv4 10.7.0.1/24 \
  --ipv6 fd00:7::1/64 \
  --endpoint vpn.example.com:51820 \
  --dns 1.1.1.1 9.9.9.9

# Generate systemd-networkd configuration
wg-gen render systemd

# Activate the interface
systemctl restart systemd-networkd

Add Clients

# Add a client named 'laptop'
wg-gen client add wg0 laptop

# Add a client 'phone' with QR code for mobile app
wg-gen client add wg0 phone --qr

Directory Structure

• wg_gen/: Main package
  • cli/: Command-line interface modules
  • db.py: Database interface
  • keygen.py: Key generation utilities
  • table.py: Table formatting for output
  • __main__.py: Entry point

Database Location

By default, the SQLite database is stored at ~/.local/share/wg-gen/database.sqlite3. You can specify a different location with the --db-path option.

Configuration Files

The tool reads configuration from ~/.local/share/wg-gen/config.ini by default or from the path specified in the WG_GEN_CONFIG environment variable.

Example

[DEFAULT]
# Default configuration for wg-gen will be written to ~/.local/share/wg-gen/config.ini
# when database is created
db_path = ~/.local/share/wg-gen/database.sqlite3

log_level = info

# Default output format for list subcommands, can be 'table', 'json', 'csv', 'tsv'
output_format = table