Keeping Your Site Comfortably Secure: An Introduction to Internet Firewalls

摘要

This document provides an overview of the Internet and security-related problems.It then provides an overview of firewall components and the general reasoning behind firewall usage. Several types of network access policies are described, as well as technical implementations of these policies. Lastly, the document contains pointers and references for more detailed information. The document is designed to assist users in understanding the nature of Internet-related problems and what types of firewalls will solve or alleviate specific problems. Users can then use this document to assist in purchasing or planning a firewall.