$ show hwdsl2/setup-ipsec-vpn
This repository provides a collection of shell scripts to automate the setup and management of an IPsec VPN server on Linux. It supports multiple VPN protocols (IPsec/L2TP, IPsec/XAuth, IKEv2) and a wide range of Linux distributions including Ubuntu, Debian, CentOS, Rocky Linux, AlmaLinux, Oracle Linux, and Alpine Linux. The main entry point is `vpnsetup.sh`, which detects the OS and runs the appropriate installer. The project also includes helper scripts for user management, IKEv2 certificate handling, upgrades, and uninstallation. Additionally, it offers an Azure ARM template for cloud deployment. The code is well-structured with OS-specific installers, common bash utility functions, and extensive documentation in multiple languages. It is a mature, widely-used DevOps tool for system administrators.
The LLM identified 3 files worth highlighting for reuse:
A self-contained script to set up IKEv2 VPN with certificate-based authentication. It handles CA creation, server/client certificates, export, revocation, and listing. The script is idempotent and can be reused in other VPN projects that require IKEv2 support.
A simple script to add a VPN user for IPsec/L2TP and XAuth. It updates configuration files and restarts services. Reusable for any IPsec VPN server using Libreswan and xl2tpd.
A GitHub Actions workflow that tests VPN installation and management across multiple Linux distributions. It uses a matrix strategy and reusable workflow calls. The pattern of testing infrastructure scripts in CI is reusable for similar projects.