What is Strongswan?

strongSwan is an open-source IPsec-based VPN solution for Linux. It implements the Internet Key Exchange (IKEv1 and IKEv2) protocols and various IPsec encryption and authentication algorithms. It is commonly used to establish secure, encrypted connections between networks or devices, such as site-to-site VPNs, remote access VPNs, and mobile VPNs. strongSwan is known for its flexibility, security, and compliance with industry standards.