802.11G Wireless LAN Interface (54 Mb/s) Stateful Packet Inspection(SPI)to prevent Denial of Service (DoS) attacks. URL / IP / MAC filter. Eight dedicated VPN tunnels. Manual Key and Automatic Key Management. 56-bit (DES), 168-bit (3DES), and AES-128 IPsec encryption algorithm. Remote Access VPN, Network Address Translation, Network Address Port Translation. Unlimited User Capacity.