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Cisco Router Firewall Security
Download Cisco Router Firewall Security
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About the Author
Richard A. Deal has 18 years experience in the computing and networking industry including networking, training, systems administration, and programming. In addition to a B.S. in mathematics and computer science from Grove City College, Richard holds many certifications from Cisco, including the CCNP and CCSP(tm) certifications. For the past seven years, Richard has operated his own company, The Deal Group, Inc., in Orlando, Florida.
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Product details
Paperback: 912 pages
Publisher: Cisco Press (August 20, 2004)
Language: English
ISBN-10: 1587051753
ISBN-13: 978-1587051753
Product Dimensions:
7.3 x 2.1 x 9.1 inches
Shipping Weight: 3.2 pounds
Average Customer Review:
4.7 out of 5 stars
7 customer reviews
Amazon Best Sellers Rank:
#2,795,689 in Books (See Top 100 in Books)
Great Item!
The two things I like most about this book are the lack of typos, and the chapter structure, in which each successive chapter builds on the security and lessons preened from previous chapters. A great Cisco router security reference.
CiscoPress's "Cisco Router Firewall Security" by Richard Deal is designed as a book to secure perimeter routers. It is both a practical (and much needed) CiscoPress guide on how to harden a key piece of the network AND an excellent tool for any potential CCIE candidate (either for the Security and R&S lab). On pretty-much every page are either detailed diagrams or complex configurations discussing the topic at hand.The other reviews of this book all comment from a security perspective, and I cannot hope to add anything new to these reviews (especially Richard Bejtlich's review). I can comment from the perspective as someone studying for the CCIE. In Parts 3 and 4, the book dives into the different types of ACLs that you may encounter on the lab. Reflexive ACLs, CBAC (Content-Based Access Control), and NBAR (Network-Based Application Recognition) are each given their own chapter and fully explained in depth (something not replicated in other CiscoPress books - I own over 50 CiscoPress books). I particularly like the discussion on page 308 on how best to counter a Smurf Attack. Chapter 13 on Lock-and-Key ACLs is also a valuable must-read for any potential CCIE candidates. In chapter 17, on page 679, is a great discussion on how to counter a TCP SYN flood attack.Overall, I think "Cisco Router Firewall Security" is the best CiscoPress book published that discusses best-practices for securing Cisco routers. Too be honest, I am kind of surprised I do not see more 'noise' on this book (either from reviews here or on the CCIE list at Groupstudy.com). I have to believe it is from the title, as the title almost implies that this is a firewall book. That is too bad, as this is an excellent book for any network admin concerned about security. Weighing in at over 850 pages, this book will take some time to digest, but will be well worth the effort!I give this book 5 pings out of 5:!!!!!
I really enjoyed reading Cisco Router Firewall Security (CRFS) by Richard Deal. This book delivers just what a technical Cisco book should: discussion of concepts, explanation of command syntax, and practical examples. The author offers several ways to solve a security problem and then recommends his preferred choice. He correctly leans towards applying cryptography when available and avoids clear-text authentication methods or control channels. If you avoid the first chapter and keep a few minor caveats in mind, I would consider CRFS to be a five-star book.CRFS covers all of the major technologies I hoped to see in a book on Cisco security functions. Though published in August 2004, it manages to provide details on the newest Cisco IOS features that contemporary books often ignore. For example, the author emphasizes the benefits of configuring SSH access, and not only SSHv1; he explains that SSHv2 is preferred. I found the book's coverage of access control lists to be very clear, and I appreciated the author's discussions of strengths and weaknesses of different ACL types. Mr. Deal is also very conscious of the load placed on the router whenever higher-end security features or traffic inspection is invoked. His warnings provide operational insights to using IOS security features. Beginning with chapter 3, each section presented just the information I needed to implement various security features.I gave CRFS four stars, and not five, because I found some of the author's perceptions of security to be confusing or sometimes wrong. He repeats at least five times the oft-quoted but never substantiated myth that "70 percent of network attacks" are internal. This is completely backwards, according to CSI/FBI and Secret Service studies that say around 70 percent of attacks are caused by outsiders. While some of the most devastating incidents are indeed perpetrated by insiders, the majority of attacks continue to be launched from outside the security perimeter. While this point may not seem that significant, it is not a solid footing on which the author can justify certain security recommendations.While reading CRFS I also sensed that neither the author nor his technical editors were security professionals. I do not mean that they do not or have not handled security incidents. In fact, several of Mr. Deal's stories explicitly and properly address intrusions and other events. Rather, I sensed the author and his team were networking professionals first, with security duties tacked on. For example, p. 8 lists applications, the OS, and network infrastructure as "threats to your company's network." These have vulnerabilities -- they are not threats. On p. 28 Mr. Deal says "SSL can protect only web application traffic," but this is wrong. Pages 31-33 lists "some of the most common" DoS attacks, but the explanations there of chargen and ping of death attacks are wrong. WinNuke, a Windows DoS exploit from 1997, is also listed! Page 94 says "IDS solutions are still in their infancy," although they have been deployed for over 10 years. These and related security misperceptions made me believe a person with a primary security role should have reviewed CRFS.It is easy to overlook these security faux pas, however. CRFS does a better job describing some security issues than other security-focused books. For example, I found the coverage of the effects of DoS attacks upon a router to be better than books specifically written about DoS! Mr. Deal frequently advocates monitoring as a way to know what is happening on the network, and I found his IDS deployment guidance to be sound.To the extend I could evaluate Mr. Deal's discussion of Cisco features, I believe they are correct. One notable exception involves using the established keyword with ACLs. On p. 269 and elsewhere, the author claims "the established keyword looks to see if the ACK, FIN, PSH, RST, SYN, or URG TCP control flags are set. If they are, the TCP traffic is allowed in." This is incorrect; established looks for only the ACK or RST flags. This is not a major concern as other filtering options provide better defense anyway.Overall, I consider CRFS to be an excellent piece of work. I am adding it to my recommended reading lists and I strongly suggest than anyone using Cisco routers in their perimeter read and heed this book. Keep an eye out for Mr. Deal's next book on building VPNs with Cisco gear.
Cisco Router Firewall Security by Richard A. Deal delivers exactly what the title says: using a Cisco router for every possible perimeter security scenario. The book is written for someone who has at least an intermediate level knowledge of Cisco router and switching technologies. Advanced security consultants may want to go to Chapter 21, Case Study Configuration, and refer back to the previous chapters for more explanation when needed. However, those responsible for network security should read the entire book to be familiar with all of the latest security features that Cisco routers are capable of as well as a number of vulnerabilities that should be hardened, when possible.Deal fills in much of the lacunae of Cisco IOS configuration that are left out of certification handbooks. His sprinkling of many anecdotes from his personal experience makes the book immensely practical. For example, the author points out that Reflexive Access Control Lists can be used as a less expensive substitute for Content Based Access Control when filtering traffic for a few dozen users.Deal's book will prepare you to deal with special situations where company policy demands something different than what a firewall in a box solution offers. As he shows you how to accomplish Intrusion Detection, Content Filtering, Security Logging, Virtual Private Networking, Denial of Service Prevention, and Access Management solutions with Cisco routers, he points out when these features should be used with a router or dedicated equipment, like the PIX firewall. I give Deal 5 stars for the layout and structure, which includes notes, cautions, tables, and configurations. But what I found most valuable was his many real life illustrations from his consulting business.
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