The ADTRAN NetVanta 2050 and 2100 are small office/home office VPN/Security gateways providing all the necessary components required to secure an integrated VPN solution. Used primarily for remote access, the NetVanta 2050 is perfect for work-at-home telecommuters. It provides key security and data management features such as IPSec VPN tunneling, stateful inspection firewall, built-in router, authenticated remote user access, and Network Address Translation. On a public infrastructure like the Internet, security is of the utmost importance. The NetVanta 2050 protects the corporate network against attacks with a built-in firewall and provides data security through encryption, authentication and key exchange. The NetVanta 2050 employs a stateful inspection firewall that protects an organization's network from common cyber attacks including TCP synflooding, IP spoofing, ICMP redirect, land attacks, ping-of-death, and IP reassembly problems. It also encrypts the data being sent out onto the network, using either the DES (Data Encryption Standard) or 3DES encryption algorithms. In addition, Internet Key Exchange (IKE) can be used for user authentication supporting public and private keys or digital certificates, assuring that the proper VPN tunnel is established and that the tunnel has not been redirected or compromised. The NetVanta 2050 offers guaranteed interoperability with ADTRAN's complete line of NetVanta 2000 Series of VPN/Security gateways: NetVanta 2300 for branch offices or as a mid-size host, NetVanta 2400 for larger corporate host applications, and the software implemented, NetVanta VPN Client. Together the NetVanta 2000 Series offers the most robust features and functions to address a wide range of enterprise VPN needs.