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Secure Your
Network for Free
U S I N G N M A P, W I R E S H A R K ,
S N O R T, N E S S U S, A N D M R T G
Eric Seagren
Wes Noonan
Technical Editor
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Syngress Publishing,Inc.,the author(s),and any person or firm involved in the writing,editing,or production
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Syngress Media®,Syngress®,“Career Advancement Through Skill Enhancement®,”“Ask the Author
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marks or service marks of their respective companies.
KEY SERIAL NUMBER
001 HJIRTCV764
002 PO9873D5FG
003 829KM8NJH2
004 49HLPWE43W
005 CVPLQ6WQ23
006 VBP965T5T5
007 HJJJ863WD3E
008 2987GVTWMK
009 629MP5SDJT
010 IMWQ295T6T
PUBLISHED BY
Syngress Publishing,Inc.
800 Hingham Street
Rockland,MA 02370
Secure Your Network for Free
Copyright © 2007 by Elsevier.All rights reserved.Except as permitted under the Copyright Act of 1976,no
part of this publication may be reproduced or distributed in any form or by any means,or stored in a database
or retrieval system,without the prior written permission of the publisher,with the exception that the program
listings may be entered,stored,and executed in a computer system,but they may not be reproduced for
publication.
1 2 3 4 5 6 7 8 9 0
ISBN-10:1-59749-123-3
ISBN-13:978-1-59749-123-5
Publisher:Andrew Williams Page Layout and Art:Patricia Lupien
Acquisitions Editor:Gary Byrne Copy Editors:Michelle Melani and Audrey
Technical Editors:Wes Noonan and Stephen Watkins Doyle
Indexer:Richard Carlson Cover Designer:Michael Kavish
For information on rights,translations,and bulk sales,contact Matt Pedersen,Director of Sales and Rights,at
Syngress Publishing;email [email protected] fax to 781-681-3585.
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Lead Author
Eric S. Seagren (CISA,CISSP-ISSAP,SCNP,CCNA,CNE-4,
MCP+I,MCSE-NT) has 10 years of experience in the computer
industry,with the last eight years spent in the financial services
industry working for a Fortune 100 company.Eric started his com-
puter career working on Novell servers and performing general net-
work troubleshooting for a small Houston-based company.Since he
has been working in the financial services industry,his position and
responsibilities have advanced steadily.His duties have included
server administration,disaster recovery responsibilities,business con-
tinuity coordinator,Y2K remediation,network vulnerability assess-
ment,and risk management responsibilities.He has spent the last
few years as an IT architect and risk analyst,designing and evalu-
ating secure,scalable,and redundant networks.
Eric has worked on several books as a contributing author or
technical editor.These include Hardening Network Security (McGraw-
Hill),Hardening Network Infrastructure (McGraw-Hill),Hacking
Exposed:Cisco Networks (McGraw-Hill),Configuring Check Point
NGX VPN-1/FireWall-1 (Syngress),Firewall Fundamentals (Cisco
Press),and Designing and Building Enterprise DMZs (Syngress).He has
also received a CTM from Toastmasters of America.
I would like to express my gratitude to several people who have
helped me make this book a reality.First and foremost I would like
to say thank you to Sandra and Angela,for their support,patience,
and understanding during the entire process.I would like to thank
Wes,for the quality and consistency of his constructive feedback.I
would also like to thank Holla,for providing the original spark of
an idea that eventually evolved into this book (specifically Chapters
2 and 7),and Moe,for being supportive when the opportunity pre-
sented itself.
v
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Technical Editors
Wesley J. Noonan (Houston,Texas) has worked in the computer
industry for more than 12 years,specializing in Windows-based net-
works and network infrastructure security design and implementa-
tion.He is a Staff Quality Engineer for NetIQ,working on the
company’s security solutions product line.Wes was the author of
Hardening Network Infrastructure (McGraw-Hill) and was a con-
tributing/coauthor for The CISSP Training Guide (Que Publishing),
Hardening Network Security (McGraw-Hill),Designing and Building
Enterprise DMZs (Syngress),and Firewall Fundamentals (Cisco Press).
Wes was also the technical editor for Hacking Exposed:Cisco
Networks (McGraw-Hill).He contributes to Redmond magazine,
writing on the subjects of network infrastructure and security,and
he maintains a Windows Network Security section called “Ask the
Experts”for Techtarget.com (http://searchwindowssecurity.
techtarget.com/ateAnswers/0,289620,sid45_tax298206,00.html).
Wes has also presented at TechMentor 2004.
Wes lives in Houston,Texas.
Stephen Watkins (CISSP) is an Information Security Professional
with more than 10 years of relevant technology experience,
devoting eight of these years to the security field.He currently
serves as Information Assurance Analyst at Regent University in
southeastern Virginia.Before coming to Regent,he led a team of
security professionals providing in-depth analysis for a global-scale
government network.Over the last eight years,he has cultivated his
expertise with regard to perimeter security and multilevel security
architecture.His Check Point experience dates back to 1998 with
FireWall-1 version 3.0b.He has earned his B.S.in Computer
Science from Old Dominion University and M.S.in Computer
Science,with Concentration in Infosec,from James Madison
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University.He is nearly a lifelong resident of Virginia Beach,where
he and his family remain active in their church and the local Little
League.
Stephen was the technical editor for Chapter 3.
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Companion Web Site
Much of the code presented throughout this book is available for
download from www.syngress.com/solutions.Look for the Syngress
icon in the margins indicating which examples are available from
the companion Web site.
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