Roland, John F. and Newcomb, Mark J. CCSP Cisco Secure VPN. Indianapolis, IN: Cisco Press, 2003.
For detailed information on the VPN concentrator initialization, go to the Cisco Web site at www.cisco.com/univercd/cc/td/doc/product/vpn/vpn3000/ and look at the "Getting Started" and "Configuration" guides.
Roland, John F. and Newcomb, Mark J. 
For detailed information on the VPN concentrator initialization, go to the Cisco Web site at www.cisco.com/univercd/cc/td/doc/product/vpn/vpn3000/ and look at the 