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The Network Administrators' Guide

Olaf Kirch

For Britta

• Contents
• List of Figures
• Introduction to Networking
  • History
  • UUCP Networks
    • How to Use UUCP
  • TCP/IP Networks
    • Introduction to TCP/IP-Networks
    • Ethernets
    • Other Types of Hardware
    • The Internet Protocol
    • IP over Serial Lines
    • The Transmission Control Protocol
    • The User Datagram Protocol
    • More on Ports
    • The Socket Library
  • Networking
    • Different Streaks of Development
    • Where to Get the Code
  • Maintaining Your System
    • System Security
  • Outlook on the Following Chapters
• Issues of TCP/IP Networking
  • Networking Interfaces
  • IP Addresses
  • Address Resolution
  • IP Routing
    • IP Networks
    • Subnetworks
    • Gateways
    • The Routing Table
    • Metric Values
  • The Internet Control Message Protocol
  • The Domain Name System
    • Hostname Resolution
    • Enter DNS
    • Name Lookups with DNS
    • Domain Name Servers
    • The DNS Database
    • Reverse Lookups
• Configuring the Networking Hardware
  • Devices, Drivers, and all that
  • Kernel Configuration
    • Kernel Options in 1.0 and Higher
    • Kernel Options in 1.1.14 and Higher
  • A Tour of Network Devices
  • Ethernet Installation
    • Ethernet Cabling
    • Supported Boards
    • Ethernet Autoprobing
  • The PLIP Driver
  • The SLIP and PPP Drivers
• Setting up the Serial Hardware
  • Communication Software for Modem Links
  • Introduction to Serial Devices
  • Accessing Serial Devices
  • Serial Hardware
• Configuring TCP/IP Networking
  • Setting up the proc Filesystem
  • Installing the Binaries
  • Another Example
  • Setting the Hostname
  • Assigning IP Addresses
  • Writing hosts and networks Files
  • Interface Configuration for IP
    • The Loopback Interface
    • Ethernet Interfaces
    • Routing through a Gateway
    • Configuring a Gateway
    • The PLIP Interface
    • The SLIP and PPP Interface
    • The Dummy Interface
  • All About ifconfig
  • Checking with netstat
    • Displaying the Routing Table
    • Displaying Interface Statistics
    • Displaying Connections
  • Checking the ARP Tables
  • The Future
• Name Service and Resolver Configuraton
  • The Resolver Library
    • The host.conf File
    • Resolver Environment Variables
    • Configuring Name Server Lookups - resolv.conf
    • Resolver Robustness
  • Running named
    • The named.boot File
    • The DNS Database Files
    • Writing the Master Files
    • Verifying the Name Server Setup
    • Other Useful Tools
• Serial Line IP
  • General Requirements
  • SLIP Operation
  • Using dip
    • A Sample Script
    • A dip Reference
      • The Modem Commands
      • echo and term
      • The get Command
      • The print Command
      • Variable Names
      • The if and goto Commands
      • send, wait and sleep
      • mode and default
  • Running in Server Mode
• The Point-to-Point Protocol
  • Untangling the P's
  • PPP on
  • Running pppd
  • Using Options Files
  • Dialing out with chat
  • Debugging Your PPP Setup
  • IP Configuration Options
    • Choosing IP Addresses
    • Routing Through a PPP Link
  • Link Control Options
  • General Security Considerations
  • Authentication with PPP
    • CHAP versus PAP
    • The CHAP Secrets File
    • The PAP Secrets File
  • Configuring a PPP Server
• Various Network Applications
  • The inetd Super-Server
  • The tcpd access control facility
  • The services and protocols Files
  • Remote Procedure Call
  • Configuring the r Commands
• The Network Information System
  • Getting Acquainted with NIS
  • NIS versus NIS+
  • The Client Side of NIS
  • Running a NIS Server
  • Setting up a NIS Client with NYS
  • Choosing the Right Maps
  • Using the passwd and group Maps
  • Using NIS with Shadow Support
  • Using the Traditional NIS Code
• The Network File System
  • Preparing NFS
  • Mounting an NFS Volume
  • The NFS Daemons
  • The exports File
  • The Automounter
• Managing Taylor UUCP
  • History
    • More Information on UUCP
  • Introduction
    • Layout of UUCP Transfers and Remote Execution
    • The Inner Workings of uucico
    • uucico Command Line Options
  • UUCP Configuration Files
    • A Gentle Introduction to Taylor UUCP
    • What UUCP Needs to Know
    • Site Naming
    • Taylor Configuration Files
    • General Configuration Options - the config File
    • How to Tell UUCP about other Systems - the sys File
      • System Name
      • Telephone Number
      • Port and Speed
      • The Login Chat
      • Alternates
      • Restricting Call Times
    • What Devices there are - the port File
    • How to Dial a Number - the dial File
    • UUCP Over TCP
    • Using a Direct Connection
  • The Do's and Dont's of UUCP - Tuning Permissions
    • Command Execution
    • File Transfers
    • Forwarding
  • Setting up your System for Dialing in
    • Setting up getty
    • Providing UUCP Accounts
    • Protecting Yourself Against Swindlers
    • Be Paranoid - Call Sequence Checks
    • Anonymous UUCP
  • UUCP Low-Level Protocols
    • Protocol Overview
    • Tuning the Transmission Protocol
    • Selecting Specific Protocols
  • Troubleshooting
  • Log Files
• Electronic Mail
  • What is a Mail Message?
  • How is Mail Delivered?
  • Email Addresses
  • How does Mail Routing Work?
    • Mail Routing on the Internet
    • Mail Routing in the UUCP World
    • Mixing UUCP and RFC 822
  • Pathalias and Map File Format
  • Configuring elm
    • Global elm Options
    • National Character Sets
• Getting smail Up and Running
  • UUCP Setup
  • Setup for a LAN
    • Writing the Configuration Files
    • Running smail
  • If You Don't Get Through...
    • Compiling smail
  • Mail Delivery Modes
  • Miscellaneous config Options
  • Message Routing and Delivery
  • Routing Messages
    • The paths database
  • Delivering Messages to Local Addresses
    • Local Users
    • Forwarding
    • Alias Files
    • Mailing Lists
  • UUCP-based Transports
  • SMTP-based Transports
  • Hostname Qualification
• Sendmail+IDA
  • Introduction to Sendmail+IDA
  • Configuration Files - Overview
  • The sendmail.cf File
    • An Example sendmail.m4 File
    • Typically Used sendmail.m4 Parameters
      • Items that Define Paths
      • Defining the Local Mailer
      • Dealing with Bounced Mail
      • Domain Name Service Related Items
      • Defining Names the Local System is Known by
      • UUCP-Related Items
      • Relay Systems and Mailers
      • The Various Configuration Tables
      • The Master Sendmail.mc File
      • So Which Entries are Really Required?
  • A Tour of Sendmail+IDA Tables
    • mailertable
    • uucpxtable
    • pathtable
    • domaintable
    • aliases
    • Rarely Used Tables
  • Installing sendmail
    • Extracting the binary distribution
    • Building sendmail.cf
    • Testing the sendmail.cf file
    • Putting it all together - Integration Testing sendmail.cf and the tables
  • Administrivia and Stupid Mail Tricks
    • Forwarding Mail to a Relay Host
    • Forcing Mail into Misconfigured Remote Sites
    • Forcing Mail to be Transferred via UUCP
    • Preventing Mail from Being Delivered via UUCP
    • Running the Sendmail Queue on Demand
    • Reporting Mail Statistics
  • Mixing and Matching Binary Distributions
  • Where to Get More Information
• Netnews
  • Usenet History
  • What is Usenet, Anyway?
  • How Does Usenet Handle News?
• C News
  • Delivering News
  • Installation
  • The sys file
  • The active file
  • Article Batching
  • Expiring News
  • Miscellaneous Files
  • Control Messages
    • The cancel Message
    • newgroup and rmgroup
    • The checkgroups Message
    • sendsys, version, and senduuname
  • C News in an NFS Environment
  • Maintenance Tools and Tasks
• A Description of NNTP
  • Introduction
  • Installing the NNTP server
  • Restricting NNTP Access
  • NNTP Authorization
  • nntpd Interaction with C News
• Newsreader Configuration
  • tin Configuration
  • trn Configuration
  • nn Configuration
• A Null Printer Cable for PLIP
• Sample smail Configuration Files
• The GNU General Public License
  • Preamble
  • Terms and Conditions for Copying, Distribution, and Modification
  • Appendix: How to Apply These Terms to Your New Programs
• Index
• About this document ...