The IPSec tunneling protocol is supported by Nortel Networks and other third-party vendors. IPSec is an emerging standard that offers a strong level of encryption (DES, Triple DES and AES), integrity protection (MD5 and SHA), and the IETF-recommended ISAKMP and Oakley Key Determination protocols, and token codes from SecurID* and AXENT*. IPSec offers the following features:
Nortel Networks provides the IPSec remote access user client software on the CD that came with your gateway. You can install the client software on a network server for your remote users to download. The client software is a Microsoft* application available for the latest releases of Windows* 95, Windows 98, Windows NT*, Windows 2000 Workstation, and Windows NT Server. The software comes with complete online help.
Nortel Networks provides two versions of the IPSec client due to export restrictions. The standard version supports DES (56-bit key) encryption, and the enhanced version supports Triple DES (3DES, 168-bit key). The self-extracting installation files for DES and Triple DES are labeled accordingly on the CD. The installation is simple; the self-extracting installation includes everything necessary to create IPSec tunnels with the gateway. For more details, refer to the readme instructions included as part of the client installation.