Preface xi
1. Overview of TCP/IP 1
TCP/IP and the Internet 2
A Data Communications Model 6
TCP/IP Protocol Architecture 9
Network Access Layer 11
Internet Layer 12
Transport Layer 18
Application Layer 22
Summary 23
2. Delivering the Data 24
Addressing, Routing, and Multiplexing 24
The IP Address 25
Internet Routing Architecture 35
The Routing Table 37
Address Resolution 43
Protocols, Ports, and Sockets 44
Summary 50
3. Network Services 51
Names and Addresses 51
The Host Table 52
DNS 54
Mail Services 62
File and Print Servers 75
Configuration Servers 76
Summary 82
4. Getting Started 84
Connected and Non-Connected Networks 85
Basic Information 86
Planning Routing 97
Planning Naming Service 101
Other Services 104
Informing the Users 106
Summary 107
5. Basic Configuration 108
Kernel Configuration 108
Startup Files 124
The Internet Daemon 129
The Extended Internet Daemon 132
Summary 133
6. Configuring the Interface 134
The ifconfig Command 134
TCP/IP Over a Serial Line 150
Installing PPP 153
Summary 169
7. Configuring Routing 170
Common Routing Configurations 170
The Minimal Routing Table 171
Building a Static Routing Table 173
Interior Routing Protocols 178
Exterior Routing Protocols 188
Gateway Routing Daemon 191
Configuring gated 193
Summary 204
8. Configuring DNS 205
BIND: Unix Name Service 205
Configuring the Resolver 207
Configuring named 211
Using nslookup 228
Summary 232
9. Local Network Services 233
The Network File System 233
Sharing Unix Printers 252
Using Samba to Share Resources with Windows 259
Network Information Service 268
DHCP 272
Managing Distributed Servers 277
Post Office Servers 280
Summary 283
10. sendmail 285
sendmail's Function 285
Running sendmail as a Daemon 286
sendmail Aliases 288
The sendmail.cf File 290
sendmail.cf Configuration Language 297
Rewriting the Mail Address 309
Modifying a sendmail.cf File 319
Testing sendmail.cf 323
Summary 332
11. Configuring Apache 333
Installing Apache Software 334
Configuring the Apache Server 338
Understanding an httpd.conf File 341
Web Server Security 361
Managing Your Web Server 378
Summary 380
12. Network Security 381
Security Planning 382
User Authentication 387
Application Security 402
Security Monitoring 404
Access Control 409
Encryption 418
Firewalls 425
Words to the Wise 433
Summary 434
13. Troubleshooting TCP/IP 435
Approaching a Problem 435
Diagnostic Tools 438
Testing Basic Connectivity 440
Troubleshooting Network Access 443
Checking Routing 450
Checking Name Service 456
Analyzing Protocol Problems 471
Protocol Case Study 474
Summary 478
A. PPP Tools 479
B. A gated Reference 503
C. A named Reference 548
D. A dhcpd Reference 586
E. A sendmail Reference 599
F. Solaris httpd.conf File 661
G. RFC Excerpts 679
Index