Best Site-to-Site VPNs for Linux
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Compare the Top Site-to-Site VPNs for Linux as of November 2026
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What are Site-to-Site VPNs for Linux?
Site-to-site VPNs are networking solutions that establish secure, encrypted connections between multiple offices, branch locations, data centers, cloud environments, and other geographically distributed networks over the internet. These solutions use virtual private network (VPN) technologies and security protocols such as IPsec and IKEv2 to protect data transmitted between networks while allowing connected locations to securely share applications, files, databases, and internal resources. Site-to-site VPNs often include features such as encrypted network tunnels, centralized configuration, automated tunnel establishment, authentication, routing management, traffic monitoring, high availability, failover protection, and network access policies. Many solutions integrate with firewalls, routers, cloud infrastructure, software-defined wide area networking (SD-WAN) platforms, and network monitoring systems to support hybrid cloud connectivity, multi-branch networking, and secure communication between distributed IT environments. By connecting separate networks through encrypted tunnels, site-to-site VPNs help organizations protect sensitive business data, simplify network administration, improve connectivity between locations, and reduce reliance on expensive dedicated private network connections. Compare and read user reviews of the best Site-to-Site VPNs for Linux currently available using the table below. This list is updated regularly.
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1
UTunnel VPN and ZTNA
Secubytes LLC
UTunnel provides Cloud VPN, ZTNA, and Mesh Networking solutions for secure remote access and seamless network connectivity. ACCESS GATEWAY: Our Cloud VPN as a Service offers swift deployment of Cloud or On-Premise VPN servers. It utilizes OpenVPN and IPSec protocols, enables policy-based access control, and lets you deploy a Business VPN network effortlessly. ONE-CLICK ACCESS: A Zero Trust Application Access (ZTAA) solution that simplifies secure access to internal business applications. It allows users to securely access them via web browsers without the need for a client application. MESHCONNECT: This Zero Trust Network Access (ZTNA) and mesh networking solution based on WireGuard enables granular access controls to business network resources and easy creation of secure mesh networks. SITE-TO-SITE VPN: The Access Gateway solution lets you easily set up secure Site-to-Site tunnels (IPSec) between UTunnel's VPN servers and hardware network gateways, firewalls & UTM systems.Starting Price: $6/user/month -
2
OpenVPN Access Server
OpenVPN
OpenVPN Access Server is a self-hosted Zero Trust Network Access (ZTNA) and business VPN solution that gives organizations full control over their own secure network. It's software organizations deploy directly into their own environment — on-premises hardware or their own cloud account on AWS, Azure, Google Cloud, or others — with tunnel traffic flowing directly between users and the server. With Access Server Link, teams can go from zero to a fully configured deployment in minutes: point-and-click setup across AWS, Azure, and GCP, automatic SSL certificate provisioning and renewal, and a web-based admin portal for managing users, certificates, and access — no SSH or manual DNS work required. Access is granted per application and per identity using domain names rather than broad network-level access, so users only reach what they're explicitly permitted to, and lateral movement is structurally blocked.Starting Price: Free Up to 2 connections -
3
SoftEther VPN
SoftEther Project
SoftEther VPN Project develops and distributes SoftEther VPN, as an academic project from University of Tsukuba, under the Apache License 2.0. The API Suite allows you to easily develop your original SoftEther VPN Server management application to control the VPN Server (e.g. creating users, adding Virtual Hubs, disconnecting a specified VPN session) from JavaScript, TypeScript, C# or other languages. SoftEther VPN ("SoftEther" means "Software Ethernet") is one of the world's most powerful and easy-to-use multi-protocol VPN software. It runs on Windows, Linux, Mac, FreeBSD and Solaris. SoftEther VPN is open source. You can use SoftEther for any personal or commercial use for free charge. SoftEther VPN is an optimum alternative to OpenVPN and Microsoft's VPN servers. SoftEther VPN has a clone-function of OpenVPN Server. You can integrate from OpenVPN to SoftEther VPN smoothly. SoftEther VPN is faster than OpenVPN. -
4
pfSense
Netgate
The pfSense project is a free network firewall distribution, based on the FreeBSD operating system with a custom kernel and including third party free software packages for additional functionality. pfSense software, with the help of the package system, is able to provide the same functionality or more of common commercial firewalls, without any of the artificial limitations. It has successfully replaced every big name commercial firewall you can imagine in numerous installations around the world, including Check Point, Cisco PIX, Cisco ASA, Juniper, Sonicwall, Netgear, Watchguard, Astaro, and more. -
5
OPNsense
OPNsense
Simple packet filters are becoming a thing of the past. Even the open-source domain is moving towards Next-Generation Firewalls. And OPNsense is a top player when it comes to intrusion detection, application control, web filtering, and anti-virus. No network is too insignificant to be spared by an attacker. Even home networks, washing machines, and smartwatches are threatened and require a secure environment. Firewalls are a component of the security concept. They protect against known and new threats to computers and networks. A firewall offers the highest level of protection if its functions are known, its operation is simple, and it is ideally positioned in the surrounding infrastructure. OPNsense accepts the challenge and meets these criteria in different ways. This book is the ideal companion for understanding, installing and setting up an OPNsense firewall.Starting Price: Free -
6
CloudConnexa
OpenVPN
CloudConnexa is OpenVPN's cloud-delivered Zero Trust Network Access (ZTNA) platform that also delivers core Security Service Edge (SSE) capabilities, replacing legacy VPN infrastructure with a fully managed, cloud-native service. Signing up provisions a private overlay network spanning 30+ global regions in a full-mesh topology for low-latency, redundant connectivity. Network and Host Connectors attach private networks, servers, and IoT devices, while OpenVPN tunnels (with Data Channel Offload for higher throughput) secure remote-user, site-to-site, and internet access. Identity-based access rules, integrated with SAML, LDAP, and SCIM, ensure users reach only authorized resources. Built-in Cyber Shield adds DNS content filtering, IDS/IPS, device identity verification, and 2FA. Domain-based routing cloaks server IPs for microsegmentation. It's all managed from one cloud dashboard, giving organizations scalable, zero-trust connectivity without running their own VPN servers.Starting Price: Free up to 5 seats -
7
VyOS
VyOS Networks
VyOS Networks is the global leader in open networking for organizations that need secure, scalable, automated networking across bare metal, cloud, and edge. Designed with flexibility and scalability in mind, VyOS provides an enterprise-grade networking platform for consistent operations and automation at scale, delivering full control and high performance with zero vendor lock-in. Our mission is to restore ownership of network infrastructure to our users through transparent, vendor-neutral networking. VyOS Universal Router provides a single, consistent networking layer across all of them: • Same operating system • Same configuration model • Same CLI and APIs • Same automation workflows • Same operational model across tenants and regions Your network, your rules.Starting Price: $7500 -
8
TLanX
TLanX
TLanX is a modern peer-to-peer mesh VPN for secure private networking. Instead of routing traffic through central gateways, devices connect directly with end-to-end encryption and automatic relay fallback. It works behind home routers, firewalls, CGNAT and cloud VMs without port forwarding. Features include fine-grained access control lists (by device, network, protocol, port and schedule), private DNS with custom internal records, smart routing with automatic path optimization, multi-network support with isolated IP spaces, site-to-site subnet advertising with HA failover, Layer 2/VLAN support (802.1Q, trunk ports, MAC learning), fleet management (remote restart, forced updates, health monitoring) and live traffic metrics. Native agents for Windows, Linux and macOS. Free plan includes 5 devices and 2 networks.Starting Price: Free -
9
strongSwan
secunet Security Networks AG
strongSwan is an open-source implementation of the Internet Key Exchange (IKE) protocols for securing IP traffic with policy- and route-based IPsec virtual private networks. It supports IKEv2 and IKEv1, IPv4 and IPv6 tunnels, mobility, certificate and pre-shared-key authentication, EAP methods, and a modular plugin system for cryptography, credentials, and networking. Network administrators and developers use it to build VPN gateways and connect network endpoints, from remote-access setups to complex IPsec deployments. The core software runs on Linux and has been ported to FreeBSD, macOS, Windows, Android, and iOS. An Android VPN client and a NetworkManager plugin for Linux desktops are also available. The source code is licensed under GPLv2, with commercial licensing available for most components and separate commercial support options. Documentation covers installation, configuration, features, and troubleshooting.Starting Price: $0 -
10
Libreswan
Libreswan
Libreswan is an open-source implementation of IPsec and Internet Key Exchange (IKE) for building and managing encrypted virtual private network connections. It supports IKEv1 and IKEv2 and negotiates security associations between systems using IPsec, with capabilities including certificate-based authentication and NAT traversal. The software runs as an installed network service on Linux and several BSD systems, using the host operating system's IPsec stack. Administrators configure connections and credentials through configuration files and command-line tools, and can review tunnel status with the included ipsec utilities. Libreswan can be used to connect compatible IPsec peers for site-to-site or remote-access VPN deployments. It is intended for network administrators and security professionals who need to configure and operate IPsec VPN gateways or endpoints.Starting Price: $0 -
11
NetFoundry
NetFoundry
NetFoundry is an identity-first Zero Trust workload connectivity platform designed to secure connections between applications, APIs, machines, AI agents, sites, cloud environments, and operational technology systems. Built on the OpenZiti open source platform, it creates private, policy-controlled connections without relying on traditional inbound ports, VPN tunnels, or IP-based trust. Each workload receives a cryptographic identity, and connections are established only after mutual authentication and identity-based policy authorization. NetFoundry supports use cases including AI security, microsegmentation, site-to-site connectivity, API security, OT and IoT connectivity, and embedded Zero Trust for solution providers. Its outbound-only architecture helps reduce attack surface, limit lateral movement, and simplify connectivity across heterogeneous networks with overlapping address spaces. -
12
AWS VPN
Amazon
AWS VPN enables secure connections between on-premises networks and AWS Virtual Private Clouds (VPCs) using IPsec VPN tunnels. Each connection includes two tunnels for high availability, terminating in different availability zones to ensure resilience. It supports both static and dynamic routing with BGP, and offers customizable tunnel options, including inside tunnel IP addresses, pre-shared keys, and BGP Autonomous System Numbers (ASNs). Accelerated Site-to-Site VPN leverages AWS Global Accelerator to route traffic through the nearest AWS edge location, improving performance by reducing latency and jitter. AWS Client VPN is a fully managed, elastic VPN service that allows users to securely access AWS and on-premises resources from any location using an OpenVPN-based client. It supports authentication through Active Directory, mutual certificate authentication, and SAML-based federated authentication.
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