Contents

ЂТ Documentation on Linux

ЂТ About this Book

ЂТ The Official Printed version

ЂТ More Information

ЂУ On the Authors

ЂТ Typographical Conventions

ЂТ The Linux Documentation Project

ЂТ Filesystem Standards

1 Introduction to Networking

1.2 UUCP Networks

1.2.1 How to Use UUCP

1.3 TCP/IP Networks

1.3.1 Introduction to TCP/IP-Networks

1.3.2 Ethernets

1.3.3 Other Types of Hardware

1.3.4 The Internet Protocol

1.3.5 IP over Serial Lines

1.3.6 The Transmission Control Protocol

1.3.7 The User Datagram Protocol

1.3.8 More on Ports

1.3.9 The Socket Library

1.4 Linux Networking

1.4.1 Diffrent Streaks of Development

1.4.2 Where to Get the Code

1.5 Maintaining Your System

1.5.1 System Security

1.6 Outlook on the Following Chapters

2 Issues of TCP/IP Networking

2.1 Networking Interfaces

2.2 IP Addresses

2.3 Address Resolution

2.4.1 IP Networks

2.4.2 Subnetworks

2.4.4 The Routing Table

2.4.5 Metric Values

2.5 The Internet Control Message Protocol

2.6 The Domain Name System

2.6.1 Hostname Resolution

2.6.2 Enter DNS

2.6.3 Name Lookups with DNS

2.6.4 Domain Name Servers

2.6.5 The DNS Database

2.6.6 Reverse Lookups

3 Configuring the Networking Hardware

3.1 Devices, Drivers, and all that

3.2 Kernel Configuration

3.2.1 Kernel Options in Linux 1.0 and Higher

3.2.2 Kernel Options in Linux 1.1.14 and Higher

3.3 A Tour of Linux Network Devices

3.4 Ethernet Installation

3.4.1 Ethernet Cabling

3.4.2 Supported Boards

3.4.3 Ethernet Autoprobing

3.5 The PLIP Driver

3.6 The SLIP and PPP Drivers

4 Setting up the Serial Hardware

4.1 Communication Software for Modem Links

4.2 Introduction to Serial Devices

4.3 Accessing Serial Devices

4.4 Serial Hareware

5 Configuring TCP/IP Networking

5.1 Setting up the proc Filesystem

5.2 installing the Binaries

5.3 Another Example

5.4 Setting the Hostname

5.5 Assgining IP Address

5.6 Writing hosts and networks Files

5.7 Interface Configuration for IP

5.7.1 The Loopback Interface

5.7.2 Ethernet Interfaces

5.7.3 Routing through a Gateway

5.7.4 Configuring a Gateway

5.7.5 The PLIP Interface

5.7.6 The SLIP and PPP Interface

5.7.7 The Dummy Interface

5.8 All About ifconfig

5.9 Checking with netstat

5.9.1 Displaying the Routing Table

5.9.2 Displaying Interface Statistics

5.9.3 Displaying Connections

5.10 Checking the ARP Tables

5.11 The Future

6 Name Service and Resolcer Configuration

6.1 The Resolver Library

6.1.1 The host.conf File

6.1.2 Resolver Environment Variables

6.1.3 Configuring Name Server Lookups - resolv.conf

6.1.4 Resolver Robustness

6.2 Running named

6.2.1 The named.boot File

6.2.2 The DNS Database Files

6.2.3 Writing the Master Files

6.2.4 Verifying the Name Server Setup

6.2.5 Other Useful Tools

7 Serial Line IP

7.1 General Requirement

7.2 SLIP Operation

7.3 Using dip

7.3.1 A Sample Script

7.3.2 A dip Reference

7.4 Running in Server Mode

8 The Point-to-Point Protocol

8.1 Untangling the P's

8.2 PPP on Linux

8.3 Running pppd

8.4 Using Options Files

8.5 Dialing out with chat

8.6 Debugging Your PPP Setup

8.7 IP Configuration Options

8.7.1 Choosing IP Addresses

8.7.2 Routing Through a PPP Link

8.8 Link Control Options

8.9 General Security Considerations

8.10 Authentication with PPP

8.10.1 CHAP versus PAP

8.10.2 The CHAP Secrets File

8.10.3 The PAP Secrets File

8.11 Configuring a PPP Server

9 Various Network Applications

9.1 The inetd Super-Server

9.2 The tcpd access control facility

9.3 The services and protocols Files

9.4 Remote Procedure Call

9.5 Configuring the r Commands

10 The Network Information Systems

10.1 Getting Acquainted with NIS

10.2 NIS versus NIS+

10.3 The Client Side of NIS

10.4 Running a NIS Server

10.5 Setting up a NIS Client with NYS

10.6 Choosing the Right Maps

10.7 Using the passwd and group Maps

10.8 Using NIS with Shadow Support

10.9 Using the Traditional NIS Code

11 The Network File System

11.1 Preparing NFS

11.2 Mounting an NFS Volume

11.3 The NFS Daemons

11.4 The exports File

11.5 The Linux Automounter

12 Managing Taylor UUCP

12.1.1 More Information on UUCP

12.2 Introduction

12.2.1 Layout of UUCP Transfers and Remote Execution

12.2.2 The Inner Workings of uucico

12.2.3 uucici Command Line Options

12.3 UUCP Configuration Files

12.3.1 A Gentle Introduction to Taylor UUCP

12.3.2 What UUCP Needs to Know

12.3.3 Site Nameing

12.3.4 Taylor Configuration Files

12.3.5 General Configuration Options - the config File

12.3.6 How to Tell UUCP about other Systems - the sys File

12.3.7 What Devices there are - the port File

12.3.8 How to Dial a Number - the dial File

12.3.9 UUCP Over TCP

12.3.10 Using a Direct Connection

12.4 The Do's and Dont's of UUCP - Tuning Permissions

12.4.1 Command Execution

12.4.2 File Transfers

12.4.3 Forwarding

12.5 Setting up your System for Dialing in

12.5.1 Setting up getty

12.5.2 Providing UUCP Accounts

12.5.3 Protecting Yourself Against Swindlers

12.5.4 Be Paranoid - Call Sequence Checks

12.5.5 Anonymous UUCP

12.6 UUCP Low-Level Protocols

12.6.1 Protocol Overview

12.6.2 Tuning the Transmission Protocol

12.6.3 Selecting Specific Protocols

12.7 Troubleshooting

13 Electronic Mail

13.1 What is a Mail Message?

13.2 How is Mail Delivered?

13.3 Email Addresses

13.4 How does Mail Routing Work?

13.4.1 Mail Routing on the Internet?

13.4.2 Mail Routing in the UUCP World

13.4.3 Mixing UUCP and RFC 822

13.5 Pathalias and Map File Format

13.6 Configuring elm

13.6.1 Global elm Options

13.6.2 National Character Sets

14 Getting smail Up and Running

14.1 UUCP Setup

14.2 Setup for a LAN

14.2.1 Writing the Configuration Files

14.2.2 Running smail

14.3 If You Don't Get Through

14.3.1 Compiling smail

14.4 Mail Delivery Modes

14.5 Miscellaneous config Options

14.6 Message Routing and Delivery

14.7 Routing Messages

14.7.1 The paths database

14.8 Delivering Messages to Local Addresses

14.8.1 Local Users

14.8.2 Forwarding

14.8.3 Alias Files

14.8.4 Mailing Lists

14.9 UUCP-based Transports

14.10 SMTP-based Transports

14.11 Hostname Qualification

15 Sendmail+IDA

15.1 Introduction to Sendmail+IDA

15.2 Configuration Files - Overview

15.3 The sendmail.cf File

15.3.1 An Example sendmail.m4 File

15.3.2 Typically Used sendmail.m4 Parameters

15.4 A Tour of Sendmail+IDA Tables

15.4.1 mailertable

15.4.2 uucpxtable

15.4.3 pathtable

15.4.4 domaintable

15.4.5 aliases

15.4.6 Rarely Used Tables

15.5 Installing sendmail

15.5.1 Extracting the binary distribution

15.5.2 Building sendmail.cf

15.5.3 Testing the sendmail.cf file

15.5.4 Putting it all together - Integration Testing sendmail.cf and the tables

15.6 Administrivia and Stupid Mail Tricks

15.6.1 Forwarding Mail to a Relay Host

15.6.2 Forcing Mail into Misconfigured Remote Sites

15.6.3 Forcing Mail to be Transferred via UUCP

15.6.4 Preventing Mail from Being Delivered via UUCP

15.6.5 Running the Sendmail Queue on Demand

15.6.6 Reporting Mail Statistics

15.7 Mixing and Matching Binary Distributions

15.8 Where to Get More Information

16.1 Usenet History

16.2 What is Usenet, Anyway?

16.3 How Does Usenet Handle News?

17.1 Delivering News

17.2 Installation

17.3 The sys file

17.4 The active file

17.5 Article Batching

17.6 Expiring News

17.7 Miscellaneous Files

17.8 Control Messages

17.8.1 The cancel Message

17.8.2 newgroup and rmgroup

17.8.3 The checkgroups Message

17.8.4 sendsys, version, and senduuname

17.9 C News in an NFS Environment

17.10 Maintenance Tools and Tasks

18 A Description of NNTP

18.1 Introduction

18.2 Installing the NNTP server

18.3 Restricting NNTP Access

18.4 NNTP Authorization

18.5 nntpd interaction with C News

19 Newsreader Configuration

19.1 tin Configuration

19.2 trn Configuration

19.3 nn Configuration

A A NULL Printer Cable for PLIP

B Sample smail Configuration Files

C The GNU General Public License

C.2 Terms and Conditions

C.3 How to Apply These Terms

Annotated Bibliography

General Books on the Internet

Administration Issues

What are Linux HOWTOs?

Where to get Linux HOWTOs

Miscellaneous and Legalese