ACS is built on Tailscale, a zero-trust networking layer that provides secure, private connectivity between Functionize test engines and customer environments.
Tailscale leverages the WireGuard® protocol for lightweight, high-performance, end-to-end encrypted tunnels.
No inbound ports required — all communication is initiated outbound, simplifying firewall and proxy traversal.
Operates seamlessly through NATs, firewalls, and corporate proxies using standard outbound HTTPS (TCP 443) and UDP (41641, 3478).
Automatic peer discovery and encrypted routing via Tailscale’s coordination servers (login.tailscale.com, controlplane.tailscale.com).
Direct peer-to-peer connections when possible, with encrypted fallback via DERP relays when direct paths are blocked.
Zero network reconfiguration — deploy an ACS agent within your LAN or DMZ and connect securely without VPN infrastructure.
End-to-end encryption at the transport layer ensures Functionize test traffic remains fully isolated from external or intermediary systems.