NETGEAR ProSafe SSL312 SSL VPN Concentrator 25 - VPN Gateway ( SSL312-100NAS) Remote Access - Supports 25 concurrent tunnels and is tailored for the Small and Mid-Sized businesses. Provides browser based secure access to your corporate network; no client required on the users laptop for remote access. Uses SSL (Secure Sockets Layer) a protocol popular in the world of e-commerce.