VPNs illustrated : tunnels, VPNs, and IPsec

著者

    • Snader, Jon C.

書誌事項

VPNs illustrated : tunnels, VPNs, and IPsec

Jon C. Snader

Addison-Wesley, c2006

  • pbk. : alk. paper

タイトル別名

Tunnels, VPNs, and IPsec

大学図書館所蔵 件 / 全2件

この図書・雑誌をさがす

注記

Includes bibliographical references and index

HTTP:URL=http://www.loc.gov/catdir/toc/ecip0517/2005023223.html Information=Table of contents

内容説明・目次

内容説明

Virtual private networks (VPNs) based on the Internet instead of the traditional leased lines offer organizations of all sizes the promise of a low-cost, secure electronic network. However, using the Internet to carry sensitive information can present serious privacy and security problems. By explaining how VPNs actually work, networking expert Jon Snader shows software engineers and network administrators how to use tunneling, authentication, and encryption to create safe, effective VPNs for any environment. Using an example-driven approach, VPNs Illustrated explores how tunnels and VPNs function by observing their behavior "on the wire." By learning to read and interpret various network traces, such as those produced by tcpdump, readers will be able to better understand and troubleshoot VPN and network behavior. Specific topics covered include: Block and stream symmetric ciphers, such as AES and RC4; and asymmetric ciphers, such as RSA and EIGamal Message authentication codes, including HMACs Tunneling technologies based on gtunnel SSL protocol for building network-to-network VPNs SSH protocols as drop-in replacements for telnet, ftp, and the BSD r-commands Lightweight VPNs, including VTun, CIPE, tinc, and OpenVPN IPsec, including its Authentication Header (AH) protocol, Encapsulating Security Payload (ESP), and IKE (the key management protocol) Packed with details, the text can be used as a handbook describing the functions of the protocols and the message formats that they use. Source code is available for download, and an appendix covers publicly available software that can be used to build tunnels and analyze traffic flow. VPNs Illustrated gives you the knowledge of tunneling and VPN technology you need to understand existing VPN implementations and successfully create your own.

目次

Preface xiii Part 1. Background 1 Chapter 1. Introduction 3 1.1 Purpose 3 1.2 Readers 4 1.3 Typographical Conventions 4 1.4 Source Code and Third-Party Programs 5 1.5 Testbed 5 1.6 Road Map 6 1.7 Summary 8 Chapter 2. TCP/IP Overview 9 2.1 Introduction 9 2.2 Layering 9 2.3 Encapsulation 11 2.4 Addressing 13 2.5 IP 20 2.6 UDP 22 2.7 TCP 24 2.8 ICMP 31 2.9 NAT and Private IP Addresses 35 2.10 PPP 40 2.11 IPv6 43 2.12 Routing 47 2.13 Summary 54 Exercises 55 Chapter 3. Cryptography Overview 57 3.1 Introduction 57 3.2 Symmetric Ciphers 58 3.3 Asymmetric Ciphers 69 3.4 Cryptographic Hash Functions, MACs, and HMACs 75 3.5 Digital Signatures 80 3.6 Certificates 83 3.7 Summary 87 Exercises 88 Chapter 4. Tunnels 89 4.1 Introduction 89 4.2 IP-in-IP Tunnels 92 4.3 PPPoE 95 4.4 GRE 100 4.5 PPTP 104 4.6 L2TP 109 4.7 MPLS 135 4.8 gtunnel 145 4.9 Summary 151 Exercises 152 Part 2. Tunnels and VPNs 153 Chapter 5. Virtual Private Networks 155 5.1 Introduction 155 5.2 PPTP 157 5.3 L2TP 158 5.4 Other VPNs 162 5.5 Summary 163 Exercises 163 Chapter 6. Secure Sockets Layer 165 6.1 Introduction 165 6.2 Cipher Suites 166 6.3 The SSL Protocol 167 6.4 SSL on the Wire 171 6.5 OpenSSL 191 6.6 The stunnel Program 196 6.7 SSL Security 204 6.8 Summary 205 Exercises 205 Chapter 7. SSH 207 7.1 Introduction 207 7.2 The SSHv1 Protocol 208 7.3 The SSHv2 Protocol 232 7.4 Building VPNs with SSH 260 7.5 Summary 266 Exercises 266 Chapter 8. Lightweight VPNs 267 8.1 Introduction 267 8.2 VTun 267 8.3 CIPE 272 8.4 Tinc 283 8.5 OpenVPN 292 8.6 Summary 302 Exercises 302 Part 3. IPSec 305 Chapter 9. IPsec 307 9.1 Introduction 307 9.2 An Overview of IPsec 308 9.3 Road Map for Part 3 308 9.4 Summary 309 Exercises 310 Chapter 10. IPsec Architecture 311 10.1 Introduction 311 10.2 Protocols 312 10.3 IPsec Modes 313 10.4 Security Associations 316 10.5 Combining Security Associations 318 10.6 Policies 320 10.7 IPsec Processing 321 10.8 Summary 323 Exercises 324 Chapter 11. AH 325 11.1 Introduction 325 11.2 The AH Header 326 11.3 Sequence Numbers 328 11.4 AH Processing 330 11.5 Transport Mode 331 11.6 Tunnel Mode 333 11.7 AH with IPv6 336 11.8 Summary 338 Exercises 338 Chapter 12. ESP 341 12.1 Introduction 341 12.2 The ESP Header 342 12.3 ESP Processing 344 12.4 Transport Mode 345 12.5 Tunnel Mode 348 12.6 ESP with IPv6 353 12.7 Summary 354 Exercises 355 Chapter 13. IKE 357 13.1 Introduction 357 13.2 ISAKMP 358 13.3 IKE 375 13.4 An Example Negotiation 388 13.5 Summary 393 Exercises 394 Chapter 14. IPsec Futures 397 14.1 Introduction 397 14.2 IPsec Architecture 398 14.3 AH 401 14.4 ESP 403 14.5 IKE 404 14.6 NAT Traversal 409 14.7 Summary 416 Exercises 416 Appendix A Source Code 419 A.1 Introduction 419 A.2 Cryptographic Routines 419 A.3 Library Code 423 Appendix B Miscellaneous Software 425 B.1 Netcat 425 B.2 tcpdump and Other Packet Sniffers 426 B.3 ssldump 429 B.4 PPP 431 Bibliography 435 Index 445

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