By International Business Machines Corporation
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Additional resources for A comprehensive guide to virtual private networks. Volume III, Cross-platform key and policy management
Fm Draft Document for Review October 15, 1999 12:00 pm by encrypting traffic that flows between the remote host and the firewall, you can prevent outsiders from eavesdropping on your information. 6 VPN technologies and security policies The following protocols and systems are commonly used to provide various degrees of security services in a computer network. Some of them are described in more detail in later chapters in this redbook. This section provides an overview of what security technologies are available today and commonly used - which creates confidence - and which ones may be suitable for VPNs.
Through the implementation of this VPN technology, the manufacturer would be able to easily extend the reach of its existing corporate intranet to include one or more parts suppliers (essentially building an extended corporate network) while enjoying the cost-effective benefits of using the Internet as its backbone. And, with the flexibility of open IPSec technology, the ability for this manufacturer to incorporate more external suppliers is limitless. 3 Remote Access Scenarios A remote user, whether at home or on the road, wants to be able to communicate securely and cost effectively back to his or her corporate intranet.
Today, IP is becoming a popular protocol for use within corporate intranets, and data traffic enters and exits the corporate intranet regularly (consider Web browsers, FTP, or Telnet applications). In today's world of e-business, there are emerging requirements for external suppliers and business partners to have access to data stored on another company's internal servers. Since traffic flowing within an intranet at any given time may have been generated by several different companies, today it may no longer be possible to categorize a given intranet as trusted or untrusted .
A comprehensive guide to virtual private networks. Volume III, Cross-platform key and policy management by International Business Machines Corporation