Cloudflare Tunnel
(Cloudflare Docs)
referencecloudflared outbound-only tunnels exposing HTTP, SSH and RDP origins with no public IP; free tier available
Home - Easy RSA
(easy-rsa.readthedocs.io)
referencePOSIX-shell X.509 PKI manager over openssl: multiple CAs, certs for OpenVPN and TLS peers
strongSwan - IPsec VPN for Linux, Android, FreeBSD, macOS, Windows
(strongswan.org)
toolIPsec IKEv2 daemon with MOBIKE, NAT traversal and a plugin system; GPL, Linux through Windows
Community Documentation
(openvpn.net)
referenceCommunity Edition docs: setup, routing, ethernet bridging, hardening, key management, platform notes
Docs · Tailscale Docs
(Tailscale)
referenceWireGuard mesh overlay: access control, subnet routers, exit nodes, logging; no-cost personal tier
Headscale
(headscale.net)
referenceself-hosted control server for a single Tailscale tailnet, aimed at hobbyists and small orgs; open source
sshuttle 1.3.2 documentation
(sshuttle.readthedocs.io)
referenceRoutes TCP and DNS through an ordinary SSH login, needing only Python on the remote host
Headscale
(headscale.net)
Self-hosted implementation of the Tailscale coordination server
WireGuard: fast, modern, secure VPN tunnel
(wireguard.com)
toolIn-kernel tunnel with modern crypto, leaner than IPsec and OpenVPN; also on Windows, macOS, BSD, mobile
OPNsense® is an open source, feature rich firewall and routing platform, offering cutting-edge network protection. - OPNsense
(OPNsense)
toolFreeBSD-based firewall/router platform: multi-WAN, IPsec/OpenVPN/WireGuard, CARP failover, NetFlow reporting