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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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