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Pro OpenSSH
Michael Stahnke
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Pro OpenSSH
Copyright © 2006 by Michael Stahnke
All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means,
electronic or mechanical, including photocopying, recording, or by any information storage or retrieval
system, without the prior written permission of the copyright owner and the publisher.
ISBN (pbk): 1-59059-476-2
Printed and bound in the United States of America 9 8 7 6 5 4 3 2 1
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of a trademarked name, we use the names only in an editorial fashion and to the benefit of the trademark
owner, with no intention of infringement of the trademark.
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Contents at a Glance
About the Author . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
About the Technical Reviewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xix
PART 1
■ ■ ■ Quick and Secure
CHAPTER 1
Legacy Protocols: Why Replace Telnet, FTP, rsh, rcp,
and rlogin with SSH? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
CHAPTER 2
A Quick SSH Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
PART 2
■ ■ ■ Configuring OpenSSH
CHAPTER 3
The File Structure of OpenSSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CHAPTER 4
The OpenSSH Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
CHAPTER 5
The OpenSSH Client . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
CHAPTER 6
Authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
PART 3
■ ■ ■ Advanced Topics
CHAPTER 7
TCP Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
CHAPTER 8
Managing Your OpenSSH Environment . . . . . . . . . . . . . . . . . . . . . . . . . 165
PART 4
■ ■ ■ Administration with OpenSSH
CHAPTER 9
Scripting with OpenSSH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 201
CHAPTER 10 SSH Tectia Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
■
APPENDIX A SSH Client Alternatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
■
APPENDIX B OpenSSH on Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
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