Cisco routers are used widely both on the Internet and in corporate intranets. At the same time, the Cisco Internet Operating System (IOS) has grown to be very large and complex, and Cisco documentation fills several volumes.Cisco IOS Access Lists focuses on a critical aspect of the Cisco IOS--access lists. Access lists are central to the task of securing routers and networks, and administrators cannot implement access control policies or traffic routing policies without them. Access lists are used to specify both the targets of network policies and the policies themselves. They specify packet filtering for firewalls all over the Internet.Cisco IOS Access Lists covers three critical areas:
- Intranets. The book serves as an introduction and a reference for network engineers implementing routing policies within intranet networking.
- Firewalls. The book is a supplement and companion reference to books such as Brent Chapman's Building Internet Firewalls. Packet filtering is an integral part of many firewall architectures, andCisco IOS Access Lists describes common packet filtering tasks and provides a "bag of tricks" for firewall implementers.
- The Internet. This book is also a guide to the complicated world of route maps. Route maps are an arcane BGP construct necessary to make high level routing work on the Internet.
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About the Author
Jeff Sedayao is a network engineer with Intel Online Services, the web and application hosting division of Intel Corporation. From 1987 through 1999, he architected and maintained Intel's Internet connectivity, starting with a simple 2400-bps email link through CSNET and ending up with multiple sites connecting to the Internet with multiple ISPs at multi-megabit speeds. He has always been fascinated with policy and policy implementation, ranging from using Cisco IOS access lists for routing and firewall policies to sendmail configurations and address space design. As part of Intel Online Services, his main interests include network usage and performance issues, DNS and email implementation, and addressing and routing policy.
Table of Contents
Chapter 1: Network Policies and Cisco Access Lists
Chapter 2: Access List Basics
Chapter 3: Implementing Security Policies
Chapter 4: Implementing Routing Policies
Chapter 5: Debugging Access Lists
Chapter 6: Route Maps
Chapter 7: Case Studies
Extended Access List Protocols and Qualifiers
Binary and Mask Tables
Common Application Ports