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Index: S

safe, storing security information in : 12.2.6. Secure Shell

SATAN tool : 12.4.3.2. SATAN

saturated networks : (see network)

scaling well

2.4. Internet Routing Architecture
3.3. Domain Name Service
4.2.1. Obtaining an IP Address
7.5.1. Exterior Gateway Protocol

scp (secure copy) : 12.2.6. Secure Shell

script files

1.7. Application Layer
6.1.5.1. Enabling and disabling the interface
(see also startup script)
(see also UNIX, systems)
debugging tips : 6.4.4. Troubleshooting Serial Connections
invoking dialup IP (dip) : A.1. Dial-Up IP

scriptfile : A.3. chat

scripting language : 6.3.2. Dial-Up PPP

search entry, in resolv.conf : 8.2.1. The Resolver Configuration File

secondary nameservers

3.3.4. BIND, resolver, and named
4.4.1. Obtaining a Domain Name
8.1.1. BIND Configurations
C.2. named.boot Configuration Commands
configuring : 8.3.1.2. Primary and secondary server configurations

secrecy

defined : 12.1.1. Assessing the Threat
keys for : 6.3.4. PPP Daemon Security

secure copy (scp) : 12.2.6. Secure Shell

SECURE points : 12.4.3.1. COPS

secure shell (ssh) : 12.2.6. Secure Shell

daemon (sshd) : 12.2.6. Secure Shell

SECURE_USERS variable : 12.4.3.1. COPS

security

1.7. Application Layer

(see also intruders)

(see also printers)

attacks

1.7. Application Layer

4.2.1. Obtaining an IP Address

importance of notifying others

12.4.2. Looking for Trouble
12.4.2.2. Checking login activity

mechanisms included within applications : 12.2.5. Secure the r Commands

monitoring : 12.4. Security Monitoring

planning : 12.1. Security Planning

policy : 12.1. Security Planning

writing : 12.1.3. Writing a Security Policy

for printers : 4.5.2. Print servers

publications, list of : 12.8. Words to the Wise

risks

4.1. Connected and Non-Connected Networks
4.2.2. Defining the Subnet Mask
5.3.1.1. Options
5.3.1.2. Pseudo-device
5.4. The Internet Daemon
9.1.2.1. The share command
13.2.1. Creating an FTP Server

sources of information : 12.1.2.2. Use mailing lists to distribute information

segments : 1.3. TCP/IP Protocol Architecture

format : 1.6.2. Transmission Control Protocol
header : 1.6.2. Transmission Control Protocol

semicolon (;)

comment character : C.3.1. Standard Resource Records

ending gated configuration statements

7.7.1.1. A host configuration
B.2. The gated Configuration Language

sender addresses : (see addresses)

sendmail

UNIX Versions

4.5.3. Planning Your Mail System

10. sendmail

aliases in : 10.3. sendmail Aliases

classes, listed : E.4.1. sendmail Classes

command : E.2. The sendmail Command

arguments, listed : E.2. The sendmail Command

compiling : E.1. Compiling sendmail

configuring : 10.5. sendmail Configuration

internal macros, listed : 10.5.2. The Define Macro Command

mailer flags, listed : E.4.3. sendmail Mailer Flags

options : E.4.2. sendmail Options

running as a daemon : 10.2. Running sendmail as a Daemon

testing and debugging arguments : 10.8. Testing sendmail.cf

tools reference : E. A sendmail Reference

using key files in : 10.8.2. Using Key Files in sendmail

using most recent release

10.8.2. Using Key Files in sendmail
E.1. Compiling sendmail

Version 8 : Preface

sendmail startup script : 10.2. Running sendmail as a Daemon

sendmail.cf file : 10.4. The sendmail.cf File

commands, listed : 10.5. sendmail Configuration

define class command (C and F) : 10.5.3. The Define Class Command

define macro command (D) : 10.5.2. The Define Macro Command

define mail headers command (H) : 10.5.7. Defining Mail Headers

define mail precedence command (P) : 10.5.6. Defining Mail Precedence

define mailers command (M) : 10.5.8. Defining Mailers

define trusted users command (T) : 10.5.5. Defining Trusted Users

examining comments in : 10.4.2. General sendmail.cf Structure

modifying : 10.7. Modifying a sendmail.cf File

local information : 10.7.1. Modifying Local Information
options : 10.7.2. Modifying Options

options and flags : E.4. More sendmail.cf

rewrite rules (R, S, and K commands) : 10.6. Rewriting the Mail Address

pattern matching : 10.6.1. Pattern Matching
transforming the address : 10.6.2. Transforming the Address

sample of, locating : 10.4.1. Locating a Sample sendmail.cf File

set option command (O) : 10.5.4. The Set Option Command

structure of : 10.4.2. General sendmail.cf Structure

testing : 10.8. Testing sendmail.cf

commands, listed : 10.8.1. Testing Rewrite Rules
rewrite rules : 10.8.1. Testing Rewrite Rules

version level command (V) : 10.5.1. The Version Level Command

sendmail.tar file : 10.4.1. Locating a Sample sendmail.cf File

Sequence Number field : 1.6.2. Transmission Control Protocol

serial

communications packages : 6.4.4. Troubleshooting Serial Connections

devices, adding manually : 6.4.4. Troubleshooting Serial Connections

interfaces : 6.2. TCP/IP Over a Serial Line

lines

load balancing : 5.2. Linux Kernel Configuration
multiple, using simultaneously : 5.2. Linux Kernel Configuration

protocols

choosing

6.2.2. Choosing a Serial Protocol
A.1.1. The dip Script File

debugging : 6.4.4. Troubleshooting Serial Connections

Serial Line IP : (see SLIP)

Serial Line IP (SLIP)

1.7. Application Layer
(see also PLIP (Parallel Line IP))

server

1.7. Application Layer
(see also remote, servers)
cache, dumping : 11.6.2. The data is here and the server can't find it!
command : 8.4. Using nslookup
configuration statement : B.8.10. The routerdiscovery Statement
master : 8.1.1. BIND Configurations
multiple : 9.1.4. NFS Automounter
program, pathname of : 5.4. The Internet Daemon

service-list : 12.5.1.1. tcpd access control files

services file

5.4. The Internet Daemon
9.3. Network Information Service
9.4. A BOOTP Server
9.7.1. POP Server
9.7.2. IMAP Server

Session Layer : 1.2. A Data Communications Model

set debug command : 8.4. Using nslookup

set domain command : 8.4. Using nslookup

set ruleset (S) command : 10.6.3. The Set Ruleset Command

set type command : 11.6.4. dig: An Alternative to nslookup

setgid permission, avoiding : 12.4.2.1. Checking files

setuid : 9.1.3.2. The vfstab and fstab files

shadow file : 12.2.1. The Shadow Password File

shadow password file : 12.2.1. The Shadow Password File

share command

9.1.2.1. The share command
9.1.5. NFS Authentication Server

sharing

directories : 9.1. The Network File System

filesystems : 9.1.2. Sharing Filesystems

common reasons for : 9.1.2. Sharing Filesystems

sharp sign (#) for comments

3.2. The Host Table
5.4. The Internet Daemon
7.7.1.1. A host configuration
9.1.4. NFS Automounter
9.2.1. The printcap File
9.4. A BOOTP Server
A.1.1. The dip Script File
D.3. The dhcpd.conf Configuration File

shell scripts : 12.4.2.1. Checking files

showmount command

4.5.1. File servers
9.1.3. Mounting Remote Filesystems

SIGHUP signal

9.4. A BOOTP Server
11.6.3. Cache corruption
A.2. The PPP Daemon
A.2.1. Signal processing
B.1.1. Signal Processing
C.1.1. Signal Processing

SIGINT signal

11.6.3. Cache corruption
A.2.1. Signal processing
B.1.1. Signal Processing
C.1.1. Signal Processing

signal processing

in gated : B.1.1. Signal Processing
in named : C.1.1. Signal Processing
in pppd : A.2.1. Signal processing

SIGTERM signal

B.1.1. Signal Processing
D.2. The dhcpd Command

silently discarding datagrams : (see datagrams)

SILO overflows : 6.1.5.4. Maximum transmission unit

Simple Gateway Management Protocol (SGMP) : 11.9. Simple Network Management Protocol

Simple Mail Transfer Protocol : (see SMTP)

Simple Network Management ProtocolNMP : (see SNMP)

single threaded mail deliver : E.3.1. define

Slackware 96 : 4.7. netconfig

slattach command : 6.4.1. slattach

slave command : C.2. named.boot Configuration Commands

SLIP (Serial Line IP)

5.2. Linux Kernel Configuration
5.3.1.2. Pseudo-device
6.2.1. The Serial Protocols
installing : 6.4. Installing SLIP
server configuration : 6.4.3. SLIP Server Configuration

SLIP END character : 6.2.1. The Serial Protocols

SLIP ESC character : 6.2.1. The Serial Protocols

slow convergence : 7.4.1.1. Running RIP with routed

SMI (Structure of Management Information) : 11.9. Simple Network Management Protocol

SMTP (Simple Mail Transfer Protocol)

1.7. Application Layer

3.4.1. Simple Mail Transfer Protocol

commands, listed : 3.4.1. Simple Mail Transfer Protocol

ESMTP (Extended SMTP)

3.4.3. Multipurpose Internet Mail Extensions
10.8. Testing sendmail.cf
private extensions to : 3.4.3. Multipurpose Internet Mail Extensions

sendmail and : 10.1. sendmail's Function

service extensions to : 3.4.3. Multipurpose Internet Mail Extensions

standardizing on : 4.5.3. Planning Your Mail System

SNMP (Simple Network Management Protocol) : 11.9. Simple Network Management Protocol

statement (in gated) : B.8.7. The snmp Statement

snoop

11.2. Diagnostic Tools
11.7. Analyzing Protocol Problems
detailed analysis with : 11.3. Testing Basic Connectivity

SOA records

8.3.2. Standard Resource Records
8.3.4. The named.local File
8.3.5. The Reverse Domain File
8.3.6. The named.hosts File
11.6.1. Some systems work, others don't
C.3.1.1. Start of Authority record

socket

1.2. A Data Communications Model
2.7.3. Sockets
pairs : 2.7.3. Sockets
types of : 5.4. The Internet Daemon

SOCKS : 12.7.1. Functions of the firewall

software

keeping updated : 12.3.2. Keep Software Updated
outdated, security problems with : 12.2. User Authentication
removing unnecessary : 12.3.1. Remove Unnecessary Software

Solaris systems

UNIX Versions

2.5. The Routing Table

2.7.1. Protocol Numbers

3.4.3. Multipurpose Internet Mail Extensions

3.5.1. Reverse Address Resolution Protocol

5.1. Kernel Configuration

10.2. Running sendmail as a Daemon

ifconfig command on

6.1.2. Checking the Interface with ifconfig
6.1.5.3. Metric

Line Printer (LP) print service in : 9.2.2. Solaris Line Printer Service

remounting filesystems on : 9.1.3.2. The vfstab and fstab files

sharing directories on : 9.1.2.1. The share command

obtaining information about : 9.1.3. Mounting Remote Filesystems

sortlist command, in resolv.conf : 8.2.1. The Resolver Configuration File

Source Code Control System (SCCS) format : 10.4.1.1. Building a sendmail.cf with m4 macros

Source Port number

1.6.1. User Datagram Protocol
1.6.2. Transmission Control Protocol

Source Quench Message : 1.5.2. Internet Control Message Protocol

source routing : 5.2. Linux Kernel Configuration

sourcegateways : B.8.2. The rip Statement

SPF protocol

7.4. Interior Routing Protocols
7.4.3. Open Shortest Path First
calculation : 7.4.3. Open Shortest Path First

split horizon rule : 7.4.1.1. Running RIP with routed

spoofing addresses : (see addresses)

ssh (secure shell) : 12.2.6. Secure Shell

command : 12.2.6. Secure Shell
daemon (sshd) : 12.2.6. Secure Shell

.ssh/identity.pub : 12.2.6. Secure Shell

.ssh/known_hosts file : 12.2.6. Secure Shell

ssh-keygen : 12.2.6. Secure Shell

stack : (see protocol, stack)

staff limitations : 4.2.2. Defining the Subnet Mask

standard resource records (RRs) : 8.3.2. Standard Resource Records

in named : C.3.1. Standard Resource Records

start of authority : (see SOA records)

startup script

7.3.1.1. Installing static routes at startup
8.3.6.1. Starting named

static

assignment of addresses : 4.2.1.1. Assigning host addresses

circumstances favoring : 4.3. Planning Routing

routing

4.3. Planning Routing
7.1. Common Routing Configurations
12.7.2. Routing control
adding routes : 7.3.1. Adding Static Routes
building tale for : 7.3. Building a Static Routing Table
installing routes at startup : 7.3.1.1. Installing static routes at startup

statements (in gated) : B.9. static Statements

status monitor daemon : 9.1.1. NFS Daemons

store and forward protocols : 3.4.1. Simple Mail Transfer Protocol

stream : 1.3. TCP/IP Protocol Architecture

sockets : 5.4. The Internet Daemon

string values, in printcap parameters : 9.2.1. The printcap File

Structure of Management Information (SMI) : 11.9. Simple Network Management Protocol

stub areas

7.4.3. Open Shortest Path First
B.8.1. The ospf Statement

subdomains

3.3.2. Creating Domains and Subdomains
8.3.5. The Reverse Domain File

subnets

2.3. Subnets

3.3.2. Creating Domains and Subdomains

administration of : 12.1.2.1. Use subnets to distribute control

enterprise : (see enterprise)

for distributing control : 12.1.2.1. Use subnets to distribute control

mask (sm)

2.3. Subnets

4. Getting Started

6.1. The ifconfig Command

assigning

6.1.3. Assigning a Subnet Mask
A.1.1. The dip Script File

defining : 4.2.2. Defining the Subnet Mask

misconfigured : 11.4.1. Troubleshooting with the ifconfig Command

parameter : 9.4. A BOOTP Server

movement among : 3.6.1. Dynamic Host Configuration Protocol

reasons for : 4.2.2. Defining the Subnet Mask

statements, in dhcpd : 9.5.1. dhcpd.conf

subscribing : 13.5. Mailing Lists

subtypes : 3.4.3. Multipurpose Internet Mail Extensions

Sun Microsystems

UNIX Versions
3.3.5. Network Information Service
3.7.1. File Sharing
9.3. Network Information Service
10.6.1. Pattern Matching
NIS+ on : 9.3.2. NIS+

supernetting : 2.2.2. Classless IP Addresses

superuser privileges

8.3.3. The Cache Initialization File
9.3. Network Information Service
B.1. The gated Command

switches

1.7. Application Layer
(see also packet)
asymmetric : 11.4.4. Subdividing an Ethernet

symmetric encryption : 12.6. Encryption

SYN (synchronize sequence numbers) bit : 1.6.2. Transmission Control Protocol

synchronization : 1.6.2. Transmission Control Protocol

synchronize sequence numbers (SYN) bit : 1.6.2. Transmission Control Protocol

synchronous modems : (see modems)

synchronous PPP, support for : 5.3.1.2. Pseudo-device

syslogd

3.2. The Host Table
A.2. The PPP Daemon
A.3. chat

system : (see network)

system file : 5.1. Kernel Configuration

Systems file : 9.2.2. Solaris Line Printer Service

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