X Through the Firewall, and Other Application Relays

Published: Feb 20, 2000
Updated: Feb 20, 2000
Section: Network Security Library :: Firewalls & VPN's
Author: G. Winfield Treese
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Organizations often impose an administrative security policy when they connect to other organizations on a public network such as the Internet. Many applications have their own notions of security, or they simply rely on the security of the underlying protocols. Using the X Window System as a case study, we describe some techniques for building application-specific "relays" that allow the use of applications across organizational boundaries. In particular, we focus on analyzing administrative and application-specific security policies to construct solutions that satisfy the security requirements while providing the necessary functions of the applications.

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