Windows 2000 Virtual Private Networking (VPN)

By: Thaddeus Fortenberry

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Paperback | 19 January 2001

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384 Pages

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22.73 x 15.24 x 2.52

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$134.75

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For courses in Windows NT/Windows 2000 Networking and Network Security.

Focus on VPNs and security has been created by concerns for privacy and data protection. Learning to configure and maintain VPNs is a necessary skill for CS students. Windows 2000 Virtual Private networking takes into account the emerging distributed workforce that networkers must support, including laptop users, home LAN environments, complex branch offices, and more-all within a secure and effective network design. The way a VPN is implemented in Windows 2000 is different that any other operating system. This book will cover all aspects of both the tunnel server and the tunnel client, covering PPTP, L2TP and IPSec, and the configuration of both tunnel and transport configuration. In addition to specific discussions about Windows 2000 tunneling, the book will show students what a network designer can do with this capability. New VPN features that can affect Active Directory replication, network address translation, Proxy and more will be covered in depth.

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Non-Fiction Computing & I.T.Operating Systems Microsoft (Windows) Operating Systems Windows 2000 Computer Networking & Communications Computer Science Computer Architecture & Logic Design Computer Security Data Encryption

Preface	p. xvi
Introduction	p. xviii
What Is a Virtual Private Network?	p. 1
History of Virtual Private Networks	p. 1
How a Virtual Private Network Works	p. 3
Alternative Services	p. 6
Transparent LAN Services (TLS)	p. 6
Secure Remote Procedure Call (RPC) Authentication (SRA)	p. 7
Secure Sockets Layer (SSL)	p. 7
Common Uses of Virtual Private Networks	p. 8
Remote Dial-In Users	p. 8
Branch Office Network Links	p. 8
Internal Networks	p. 10
Other Benefits of Virtual Private Networks	p. 12
Summary	p. 12
Basic Virtual Private Network Deployment	p. 13
Terminology	p. 13
Design Considerations	p. 15
Network Access Is Too Expensive	p. 15
Data Security Concerns	p. 17
Methods of Attack on Network Traffic	p. 18
Virtual Private Network Deployment	p. 24
Network Design Concepts with Tunneling	p. 27
Network Infrastructure	p. 27
Network Topology	p. 28
Firewalls	p. 29
Summary	p. 29
VPN Features in Windows 2000	p. 31
Active Directory	p. 32
PPTP	p. 33
L2TP	p. 34
IPSec	p. 35
Internet Key Exchange (IKE)	p. 37
NAT	p. 37
Connection Manager	p. 38
Certificate Server	p. 38
Dynamic DNS	p. 39
Highly Configurable Network Traffic	p. 40
Easier Router Configuration	p. 40
Summary	p. 41
Point-to-Point Tunneling Protocol (PPTP)	p. 43
How PPTP Works	p. 44
PPP Features	p. 44
Putting the PPTP Basics Together	p. 46
PPTP Encryption	p. 46
PPTP Security	p. 47
Performance Gains	p. 51
Summary	p. 65
Certificates	p. 67
What Is a Certificate Server?	p. 67
Digital Signatures	p. 69
X.509 Version 3 Certificates	p. 70
Certificate Authority	p. 70
CA Trust and Hierarchy	p. 71
Rooted Hierarchies	p. 72
Cross Certification Hierarchy	p. 72
Certificate Enrollment	p. 73
Certificate Verification	p. 74
Certificate Revocation	p. 75
Certificate Storage Model	p. 75
Implementing Certificate Server for Virtual Private Networks	p. 77
Windows 2000 Certificate Procedures	p. 79
Summary	p. 99
Internet Protocol Security (IPSec)	p. 101
IPSec Communication	p. 102
Transport Mode	p. 102
Tunnel Mode	p. 103
The IPSec Driver and the TCP/IP Stack	p. 104
Authentication Header	p. 106
Encapsulating Security Payload (ESP)	p. 107
Application Independence	p. 109
IPSec versus SSL	p. 111
Choosing an IPSec Environment	p. 111
Additional Information About IPSec Tunnel Mode	p. 112
Managing IPSec Policies	p. 113
Bringing the Whole IPSec Picture Together	p. 114
End-to-End Security Between Two Systems in a Domain	p. 119
Creating a Custom IPSec Policy	p. 122
Setting Up an IPSec Tunnel Linking Two Sites	p. 126
Configuring the Destination Gateway	p. 135
Testing and Observing Your IPSec Policy	p. 140
Enable IPSec Logging	p. 142
Creating Many IPSec Policies	p. 143
Summary	p. 144
Layer 2 Tunneling Protocol (L2TP)	p. 145
Goals for Windows 2000 L2TP/IPSec	p. 145
L2TP versus PPTP	p. 146
Transport	p. 147
Authentication	p. 147
Delivery	p. 148
Certificates	p. 148
Address Translation	p. 149
L2TP Implementation Details	p. 150
Security	p. 150
L2TP Communications in Detail	p. 151
Authentication	p. 153
L2TP Encryption	p. 153
Internet Key Exchange Settings	p. 154
Altering Encryption Key Behavior	p. 155
Key Lifetimes	p. 156
Session Key Limit	p. 156
Key Exchange Methods (H3)	p. 157
Main Mode Key Exchange	p. 157
Quick Mode Lifetimes	p. 157
Power Management	p. 158
L2TP/IPSec Procedures	p. 158
Summary	p. 166
NAT and Proxy Servers	p. 167
Proxy Server	p. 168
Application Proxy	p. 168
SOCKS Proxy	p. 169
Proxy Server Functions: Speed and Security	p. 169
Speed	p. 169
Security	p. 170
Disadvantages of Proxy Servers	p. 170
Network Address Translation	p. 171
Advantages of NAT	p. 173
Disadvantages of NAT	p. 173
Firewalls	p. 174
Edge Servers	p. 174
Windows 2000 Network Address Translation	p. 175
Windows 2000 Professional: Internet Connection Sharing	p. 175
Windows 2000 Server: Full-Featured NAT	p. 177
Various Server-Side Network Designs	p. 178
Various Client-Side Network Designs	p. 186
Client-Side Firewalls	p. 187
Client-Side NAT Service	p. 188
Using Hybrid Solutions for Client-Side Connections	p. 189
Maintaining Two Connections at the Remote Office Location	p. 190
Using the Proxy Server as the Tunnel Endpoint	p. 192
Using the NAT Server as the Tunnel Endpoint	p. 193
Nesting Tunnels for End-to-End Security from Remote Networks	p. 194
Summary of Distributed Network Designs	p. 195
NAT and Proxy Server Configuration	p. 195
Setting Up Internet Connection Sharing (ICS)	p. 195
Setting Up NAT with RRAS	p. 199
Sharing a VPN Link	p. 207
Summary	p. 208
Connection Manager, Remote Access Policy, and IAS	p. 209
Connection Manager	p. 210
Using the Connection Manager	p. 210
Requirements	p. 212
Implementation	p. 213
Remote Access Policies	p. 213
Dial-In Properties of a User Account	p. 214
Windows 2000 Remote Access Policy	p. 216
Conditions	p. 216
Permission	p. 218
Profile	p. 219
Remote Access Policies and Windows NT 4.0 RRAS Server	p. 225
Internet Authentication Service (IAS)	p. 226
Windows NT Implementation	p. 226
Windows 2000 Implementation	p. 226
IAS Features	p. 227
Integration with RRAS	p. 228
When Should Your Network Use RADIUS?	p. 228
Installing and Configuring IAS	p. 229
Summary	p. 233
Routing and Filtering	p. 235
Windows 2000 Routing	p. 235
Types of Routing in Windows 2000	p. 236
Secure Routed Connections	p. 239
Client-Side Routing	p. 240
Default Gateway	p. 240
Invalid Persistent Routes	p. 244
Routing Issues	p. 246
Routing Security	p. 247
Pushing the Envelope with Client-Side Routing	p. 247
Automatic Private IP Addressing (APIPA)	p. 249
Tunnels and Routing	p. 251
Packet Filtering	p. 252
Placing the Tunnel Server in Front of the Firewall	p. 253
Protecting Internal Resources	p. 254
Placing the Tunnel Server Behind the Firewall	p. 256
Summary	p. 259
Name Resolution in Windows 2000	p. 261
Name Resolution for Tunnel Clients	p. 262
Name Resolution for Home LAN/Branch Office	p. 265
Configuring a DNS for a Home LAN/Branch Office Environment	p. 267
Name Resolution for Disjointed Networks	p. 269
Name Resolution for a VPN-Based Active Directory Environment	p. 271
Happy VPN Networks--A case Study	p. 272
Relationship Between the Branch Office Name Servers	p. 276
Summary	p. 277
Active Directory Design in VPNs	p. 279
Replication	p. 281
The Knowledge Consistency Checker	p. 281
Forcing Replication Manually	p. 284
Urgent Active Directory Replication	p. 284
Single Master Replication and VPNs	p. 284
Optimization	p. 285
Site Design	p. 287
Site Design for VPNs	p. 287
Site Topology	p. 288
Site Topology Components	p. 289
Deploying the AD	p. 291
Mapping IP Addresses	p. 291
Mapping Firewall/NAT IP Ports for Active Directory	p. 292
SMTP Replication	p. 294
Linking Sites with a VPN	p. 295
Conclusions	p. 296
The Happy VPN Model	p. 296
Summary	p. 298
History and Context of Virtual Private Networking	p. 301
The Early Years	p. 301
ISPs	p. 302
Private Networks	p. 303
OSI Reference Model	p. 303
The Physical Layer	p. 305
The Data Link Layer	p. 305
The Network Layer	p. 306
The Transport Layer	p. 306
The Session Layer	p. 307
The Presentation Layer	p. 307
The Application Layer	p. 308
VPN-Related RFCs	p. 308
Troubleshooting	p. 313
Troubleshooting Factors	p. 313
PPTPCLNT and PPTPSRV	p. 315
Performance	p. 315
Common Issues and Troubleshooting Tips	p. 316
Enable Logging on the RRAS Server	p. 317
Troubleshooting IPSec	p. 318
Network Monitor	p. 318
Port Scanners	p. 319
Summary	p. 319
Windows 2000 to Cisco IOS IPSec Connectivity	p. 321
Network Setup	p. 322
Windows 2000 Security Policy Configuration	p. 323
Cisco IPSec Configuration	p. 336
Testing	p. 340
Summary	p. 342
VPN and Network Futures	p. 343
Predicting VPN and Windows Trends	p. 343
Index	p. 347
Table of Contents provided by Syndetics. All Rights Reserved.

Windows 2000 Virtual Private Networking (VPN)

At a Glance

Paperback

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