strongSwan – IPsec VPN Solution

strongSwan is a complete IPsec implementation for Linux that provides encryption and authentication for network...

Networking Tools Linux Open Source

strongSwan is a complete IPsec implementation for Linux that provides encryption and authentication for network communications. Supporting IKEv1 and IKEv2 protocols, it enables secure site-to-site VPNs, remote access VPNs, and integrates with enterprise authentication systems.

📑 Table of Contents

Key Features

  • IKEv1/IKEv2 – Full IPsec protocol support
  • X.509 Certificates – PKI-based authentication
  • EAP Authentication – Enterprise integration
  • NAT Traversal – Works behind firewalls
  • High Availability – Cluster support

Installation

sudo apt install strongswan    # Debian/Ubuntu
sudo dnf install strongswan    # Fedora/RHEL

Basic Configuration

# /etc/ipsec.conf
config setup
    charondebug="ike 2, knl 2"

conn site-to-site
    left=192.168.1.1
    leftsubnet=10.1.0.0/24
    right=203.0.113.1
    rightsubnet=10.2.0.0/24
    auto=start

# Start service
sudo systemctl enable --now strongswan

Download strongSwan

Was this article helpful?

↑