
Chapter 68 Virtual Private Networks (VPN) 651
BCM 4.0 Networking Configuration Guide
IPSec
The IPsec tunneling protocol is supported by Nortel and other third-party vendors. IPsec is a
standard that offers a strong level of encryption (DES, Triple DES and AES), integrity protection
(MD5 and SHA), and the IETF-recommended Internet Security Association & Key Management
Protocol (ISAKMP) and Oakley Key Determination Protocols.
Refer to the following topics for additional information:
• “Encryption” on page 652
• “Settings required for IPSec tunnels” on page 654
• “IPSec Branch Office Tunnel configuration” on page 664
• “Creating a tunnel between two BCMs” on page 673
• “IPSec Remote User Tunnel configuration” on page 674
• “Adding a Remote User IPSec Tunnel” on page 677
IPsec offers the following features
• Branch Office support that allows you to configure an IPSec tunnel connection between two
private networks.
• Client support is via the Contivity VPN client. The BCM supports VPN client support from a
remote computer with version of the VPN Client installed. No special ISP services are
required.
• Support for IP address translation via encapsulation, packet-by-packet authentication.
• Strong encryption and token codes.
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