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Index: C

C shell : (see csh)

-c switch (sendmail) : sendmail, 36.7. Alphabetized Reference

-C switch (sendmail)

sendmail, 5.2. The Minimal File
sendmail, 15.2. The Real Queue Directory
sendmail, 36.7. Alphabetized Reference

C2 audit : Practical UNIX & Internet Security, 10.1. The Basic Log Files

C= equate : sendmail, 30.4. The Equates

cable tester

TCP/IP Network Administration, 11.2. Diagnostic Tools
TCP/IP Network Administration, 11.3.1. The ping Command
TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat

cables

Category 5 : TCP/IP Network Administration, 11.4.4. Subdividing an Ethernet

checking

TCP/IP Network Administration, 6.4.4. Troubleshooting Serial Connections
TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat
TCP/IP Network Administration, 11.4.4.1. Network hardware problems

network

Practical UNIX & Internet Security, 12.2.4.2. Network cables
Practical UNIX & Internet Security, 12.3.1.5. Fiber optic cable
Practical UNIX & Internet Security, 12.3.1.1. Wiretapping
cutting : Practical UNIX & Internet Security, 25.1. Destructive Attacks
wiretapping : Practical UNIX & Internet Security, 12.3.1.1. Wiretapping

Unshielded Twisted Pair (UTP) : TCP/IP Network Administration, 11.4.4. Subdividing an Ethernet

caching

Practical UNIX & Internet Security, 5.6. Device Files

TCP/IP Network Administration, 3.3. Domain Name Service

corruption : TCP/IP Network Administration, 11.6.3. Cache corruption

initialization file : TCP/IP Network Administration, 8.3.3. The Cache Initialization File

MX records : sendmail, 21.3.6. Caching MX Records

nameserver : Practical UNIX & Internet Security, 16.3.2. Security and Nameservice

servers : sendmail, 21.1. Overview

single answers : TCP/IP Network Administration, 3.3.4. BIND, resolver, and named

statement

TCP/IP Network Administration, 8.3.1.1. Configuring a caching-only nameserver
TCP/IP Network Administration, C.2. named.boot Configuration Commands

caching-only servers

TCP/IP Network Administration, 3.3.4. BIND, resolver, and named
TCP/IP Network Administration, 8.1.1. BIND Configurations
TCP/IP Network Administration, 8.3.1.1. Configuring a caching-only nameserver

Caesar Cipher : Practical UNIX & Internet Security, 6.4.3. ROT13: Great for Encoding Offensive Jokes

calculating costs of losses : Practical UNIX & Internet Security, 2.3.1. The Cost of Loss

call forwarding : Practical UNIX & Internet Security, 14.5.4. Physical Protection of Modems

Call Trace : Practical UNIX & Internet Security, 24.2.4. Tracing a Connection

CALLBACK= command : Practical UNIX & Internet Security, 15.5.2. Permissions Commands

callbacks

Practical UNIX & Internet Security, 14.4.2.
Practical UNIX & Internet Security, 14.6. Additional Security for Modems
BNU UUCP : Practical UNIX & Internet Security, 15.5.2. Permissions Commands
Version 2 UUCP : Practical UNIX & Internet Security, 15.4.1.5. Requiring callback

Caller-ID (CNID)

Practical UNIX & Internet Security, 14.4.3. Caller-ID (CNID)
Practical UNIX & Internet Security, 14.6. Additional Security for Modems
Practical UNIX & Internet Security, 24.2.4. Tracing a Connection

Canada, export control in : Practical UNIX & Internet Security, 6.7.2. Cryptography and Export Controls

cannot connect error : TCP/IP Network Administration, 3.4.1. Simple Mail Transfer Protocol

/canon rule-testing command : sendmail, 38.5.1. Canonify a Host with /canon

canonical name : sendmail, 7.3.1. The hostname

CNAME resource records

sendmail, 21.3.2. MX to CNAME Causes Extra Lookups
sendmail, 34.8. Alphabetized Reference
TCP/IP Network Administration, 8.3.6. The named.hosts File
TCP/IP Network Administration, 10.7.1. Modifying Local Information
TCP/IP Network Administration, C.3.1.5. Canonical Name record

determining with DNS : sendmail, 21.2.1. Determine the Local Canonical Name

host : sendmail, 31.10. Alphabetized Reference

local : (see $j macro)

canonicalization

sendmail, 17.2.1. Is the Host Local?

sendmail, 38.5.1. Canonify a Host with /canon

$[ and $] operators and

sendmail, 19.6. Alphabetized m4 Macros
sendmail, 21.2.4. The $[ and $] Operators
sendmail, 28.6.6. Canonicalize Hostname: $[ and $]
sendmail, 33.4.3. $[ and $]: A Special Case

nocanonify feature : sendmail, 19.6. Alphabetized m4 Macros

capitalization

aliases : sendmail, 3.1.1. The Aliases File

database keys

sendmail, 33.2.1.2. -f don't fold uppercase to lowercase
sendmail, 33.3.4.3. -f don't fold keys to lowercase (V8.1 and above)

hostnames : sendmail, 30.8. Alphabetized F= Flags

macro names and : sendmail, 7.2. Defining Macros

usernames

Practical UNIX & Internet Security, 3.1. Usernames
sendmail, 30.8. Alphabetized F= Flags

capturing intruders : Building Internet Firewalls, 13.3. Pursuing and Capturing the

carbon copies : sendmail, 35.10. Alphabetized Reference

carbon monoxide : Practical UNIX & Internet Security, 12.2.1.2. Smoke

caret (^) in encrypted messages : Practical UNIX & Internet Security, 6.2. What Is Encryption?

carrier-detect (DCD) indicator, monitoring : TCP/IP Network Administration, 6.3.3. chat

case : (see capitalization)

cat command

Practical UNIX & Internet Security, 3.2.2. The /etc/passwd File
Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
-ve option : Practical UNIX & Internet Security, 5.5.4.1. The ncheck command
-v option : Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories

cat-passwd command : Practical UNIX & Internet Security, 3.2.2. The /etc/passwd File

catastrophe logs : Building Internet Firewalls, 5.8.1.4. Safeguard the system logs

category data, DSN delivery : sendmail, 30.5.2.1. The $@ dsn part

CBC (cipher block chaining)

Practical UNIX & Internet Security, 6.4.4.2. DES modes
Practical UNIX & Internet Security, 6.6.2. des: The Data Encryption Standard

CBW (Crypt Breaker's Workbench) : Practical UNIX & Internet Security, 6.6.1.1. The crypt program

"Cc:" header line : sendmail, 35.10. Alphabetized Reference

CCTA IT Security & Infrastructure Group : Practical UNIX & Internet Security, F.3.4.39. UnisysUK: other government

CD-ROM

Building Internet Firewalls, 5.3.3. What Hardware Configuration?
Practical UNIX & Internet Security, 9.1.2. Read-only Filesystems

CDFs (context-dependent files)

Practical UNIX & Internet Security, 5.9.2. Context-Dependent Files
Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories

ceilings, dropped : Practical UNIX & Internet Security, 12.2.3.1. Raised floors and dropped ceilings

cellular telephones : Practical UNIX & Internet Security, 12.2.1.8. Electrical noise

central administrator : (see system administration)

CERCUS (Computer Emergency Response Committee for Unclassified Systems) : Practical UNIX & Internet Security, F.3.4.36. TRW Network Area and System Administrators

Cerf, Vint : Practical UNIX & Internet Security, 16.2. IPv4: The Internet Protocol Version 4

CERN : Practical UNIX & Internet Security, E.4.1. CERN HTTP Daemon

HTTP daemon : Building Internet Firewalls, B.5.2. CERN httpd
HTTP server : Building Internet Firewalls, 8.6.2. Proxying Characteristics of

CERT (Computer Emergency Response Team)

Practical UNIX & Internet Security, 6.5.2. Using Message Digests
Practical UNIX & Internet Security, 27.3.5. Response Personnel?
Practical UNIX & Internet Security, F.3.4.1. All Internet sites
CERT-NL (Netherlands) : Practical UNIX & Internet Security, F.3.4.25. Netherlands: German government institutions
mailing list for : Practical UNIX & Internet Security, E.1.3.4. CERT-advisory

CERT-CC response teams

Building Internet Firewalls, 13.4.4.2. CERT-CC and other incident response teams
Building Internet Firewalls, A.2.2. info.cert.org
Building Internet Firewalls, A.3.5. CERT-Advisory
Building Internet Firewalls, A.5.1. CERT-CC
contacting regarding incident : Building Internet Firewalls, 13.1.4.2. CERT-CC or other incident response

cf directory : sendmail, 16.1. The cf/cf Directory

cf/cf directory : TCP/IP Network Administration, 10.4.1. Locating a Sample sendmail.cf File
cf/feature directory : TCP/IP Network Administration, E.3.2. FEATURE
cf/ostype directory : TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros

_CF_DIR_ macro : sendmail, 19.2.1. Maintain local files with _CF_DIR_

CFB (cipher feedback) : Practical UNIX & Internet Security, 6.4.4.2. DES modes

CGI (Common Gateway Interface)

Building Internet Firewalls, 8.6.3.1. What can a malicious client do to

Practical UNIX & Internet Security, 18.1. Security and the World Wide Web

scripts

Practical UNIX & Internet Security, 18.2. Running a Secure Server
Practical UNIX & Internet Security, 18.2.3. Writing Secure CGI Scripts and ProgramsThe
Practical UNIX & Internet Security, 18.2.4.1. Beware mixing HTTP with anonymous FTP

cgi-bin directory : Practical UNIX & Internet Security, 18.2.2. Understand Your Server's Directory Structure

cgm image subtype : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

chacl command : Practical UNIX & Internet Security, 5.2.5.2. HP-UX access control lists

Challenge Handshake Authentication Protocol : (see CHAP)

challenge string : TCP/IP Network Administration, 6.3.4. PPP Daemon Security

challenge-response system

Building Internet Firewalls, 10.2.2. Something You Know
Building Internet Firewalls, 10.3.3. Challenge-Response Schemes

change detection

Practical UNIX & Internet Security, 9.2. Detecting Change
Practical UNIX & Internet Security, 9.3. A Final Note

CHAP (Challenge Handshake Authentication Protocol)

TCP/IP Network Administration, 6.3.4. PPP Daemon Security
TCP/IP Network Administration, A.2. The PPP Daemon

chap-secrets file : TCP/IP Network Administration, 6.3.4. PPP Daemon Security

Chapman, Brent : TCP/IP Network Administration, 12.1.1. Assessing the Threat

character devices : Practical UNIX & Internet Security, 5.6. Device Files

character set : sendmail, 30.4. The Equates

character-type arguments : sendmail, 34.5. Option Argument Types

chat groups, harassment via : Practical UNIX & Internet Security, 26.4.7. Harassment, Threatening Communication, and Defamation

chat script

TCP/IP Network Administration, 6.3.3. chat
TCP/IP Network Administration, A.2. The PPP Daemon
TCP/IP Network Administration, A.3. chat

chatkey : TCP/IP Network Administration, A.1.1. The dip Script File

chdir command

Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
Practical UNIX & Internet Security, 25.2.2.8. Tree-structure attacks

check_compat rule set : sendmail, 29.10.4. The check_compat Rule Set

check_mail rule set

sendmail, 20.2.6. Reject Mail from Spamming or Mail-bombing Sites
sendmail, 29.10.1. The check_mail Rule Set

check_rcpt rule set : sendmail, 29.10.2. The check_rcpt Rule Set

check_relay rule set : sendmail, 29.10.3. The check_relay Rule Set

CheckAliases (n) option

sendmail, 24.5.2. Check the Right Side of Aliases
sendmail, 34.8. Alphabetized Reference

checkcompat()

sendmail, 20. The checkcompat() Cookbook
sendmail, 20.3. Alphabetized V8.8 Subroutines

checking : (see testing)

checklists for detecting changes

Practical UNIX & Internet Security, 9.2.2. Checklists and Metadata
Practical UNIX & Internet Security, 9.2.3. Checksums and Signatures

CheckpointInterval (C) option : sendmail, 34.8. Alphabetized Reference

checksums

Building Internet Firewalls, 5.8.5.3. About checksums for auditing

Practical UNIX & Internet Security, 6.5.5.1. Checksums

Practical UNIX & Internet Security, 9.2.3. Checksums and Signatures

TCP/IP Network Administration, 1.6.2. Transmission Control Protocol

TCP/IP Network Administration, 11.8. Protocol Case Study

keeping secure : Building Internet Firewalls, 13.5.3. Keeping Secured Checksums

recalculating

TCP/IP Network Administration, 4.2.1. Obtaining an IP Address
TCP/IP Network Administration, 5.3.1.1. Options

using Tripwire for : Building Internet Firewalls, 5.8.5.1. Auditing packages

Chesson, Greg : Practical UNIX & Internet Security, 15.2. Versions of UUCP

chfn command : Practical UNIX & Internet Security, 8.2. Monitoring File Format

chgrp command : Practical UNIX & Internet Security, 5.8. chgrp: Changing a File's Group

child processes : Practical UNIX & Internet Security, C.2. Creating Processes

child, sendmail : sendmail, 30.6.2. The Child

chkey command : Practical UNIX & Internet Security, 19.3.1.1. Proving your identity

chmod command

Practical UNIX & Internet Security, 5.2.1. chmod: Changing a File's Permissions
Practical UNIX & Internet Security, 5.2.4. Using Octal File Permissions
Practical UNIX & Internet Security, 8.3. Restricting Logins
-A option : Practical UNIX & Internet Security, 5.2.5.2. HP-UX access control lists
-f option : Practical UNIX & Internet Security, 5.2.1. chmod: Changing a File's Permissions
-h option : Practical UNIX & Internet Security, 5.2.1. chmod: Changing a File's Permissions
-R option : Practical UNIX & Internet Security, 5.2.1. chmod: Changing a File's Permissions

choke points

Building Internet Firewalls, 3.3. Choke Point
Building Internet Firewalls, 9.2.3.3. Choke point
(see also firewalls)
(see also interior router)
using router as : Building Internet Firewalls, 6.1. Why Packet Filtering?

choot mechanism : Building Internet Firewalls, 5.3.1. What Operating System?

chown command

Practical UNIX & Internet Security, 5.7. chown: Changing a File's Owner
Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs

chroot command

Building Internet Firewalls, 8.2.1.3. Providing anonymous
Practical UNIX & Internet Security, 8.1.5. Restricted Filesystem
Practical UNIX & Internet Security, 8.1.5.2. Checking new software
Practical UNIX & Internet Security, 11.1.4. Trojan Horses
Practical UNIX & Internet Security, 23.4.1. Using chroot()
with anonymous FTP : Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP

chrootuid daemon

Building Internet Firewalls, B.6.3. chrootuid
Practical UNIX & Internet Security, E.4.2. chrootuid

chsh command : Practical UNIX & Internet Security, 8.7.1. Integrating One-time Passwords with UNIX

CIAC (Computer Incident Advisory Capability) : Practical UNIX & Internet Security, F.3.4.43. U.S. Department of Energy

CIDR (Classless Inter-Domain Routing)

Practical UNIX & Internet Security, 16.2.1.1. IP networks

Practical UNIX & Internet Security, 16.2.1.3. CIDR addresses

TCP/IP Network Administration, 2.2.2. Classless IP Addresses

address mask

TCP/IP Network Administration, 2.2. The IP Address
TCP/IP Network Administration, 2.2.2. Classless IP Addresses

blocks : TCP/IP Network Administration, B.11. The Aggregate Statements

cigarettes : Practical UNIX & Internet Security, 12.2.1.2. Smoke

cipher

Practical UNIX & Internet Security, 6.4.3. ROT13: Great for Encoding Offensive Jokes

TCP/IP Network Administration, 12.6. Encryption

(see also cryptography; encryption)

block chaining (CBC)

Practical UNIX & Internet Security, 6.4.4.2. DES modes
Practical UNIX & Internet Security, 6.6.2. des: The Data Encryption Standard

ciphertext

Practical UNIX & Internet Security, 6.2. What Is Encryption?
Practical UNIX & Internet Security, 8.6.1. The crypt()

feedback (CFB) : Practical UNIX & Internet Security, 6.4.4.2. DES modes

circuit-level proxy servers : Building Internet Firewalls, 7.3.1. Application-Level Versus Circuit-Level

CISCO : Practical UNIX & Internet Security, F.3.4.8. CISCO Systems

Cisco routers

Building Internet Firewalls, 6.5. Conventions for Packet Filtering
TCP/IP Network Administration, 12.5. Access Control

civil actions (lawsuits) : Practical UNIX & Internet Security, 26.3. Civil Actions

class command : sendmail, 12.1. The Class Command

class macros

sendmail, 5.3.5. Class Macros
sendmail, 12. Class
sendmail, 32. Class Macros
m4 and : sendmail, 32.3. Class with m4

class w, defining : TCP/IP Network Administration, 10.7.1. Modifying Local Information

class= equate (syslog output) : sendmail, 26.1.3.1. class= the queue class

classes

adding to : sendmail, 38.2.2. Add to a Class with .C
of addresses : (see addresses, classes of)
database : sendmail, 33.8. Alphabetized Reference
declaring : sendmail, 32.1. Class Configuration Commands
looking up words in : sendmail, 20.3. Alphabetized V8.8 Subroutines
name hashing algorithm : sendmail, 32.2.4. Class Name Hashing Algorithm
storing in files : sendmail, 12.2. The File Form of Class

ClassFactor (z) option : sendmail, 34.8. Alphabetized Reference

classified data and breakins

Practical UNIX & Internet Security, 26.1. Legal Options After a Break-in
Practical UNIX & Internet Security, 26.2.2. Federal Jurisdiction

Classless Inter-Domain Routing (CIDR)

Practical UNIX & Internet Security, 16.2.1.1. IP networks

Practical UNIX & Internet Security, 16.2.1.3. CIDR addresses

TCP/IP Network Administration, 2.2.2. Classless IP Addresses

address mask

TCP/IP Network Administration, 2.2. The IP Address
TCP/IP Network Administration, 2.2.2. Classless IP Addresses

blocks : TCP/IP Network Administration, B.11. The Aggregate Statements

clear text

Practical UNIX & Internet Security, 8.6.1. The crypt()
TCP/IP Network Administration, 12.6. Encryption

Clear to Send (CTS) : Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol

client

authentication, network filesystems and : Building Internet Firewalls, 2.12. Network File Systems
flooding : Practical UNIX & Internet Security, 16.3.2. Security and Nameservice
internal versus external : Building Internet Firewalls, 7.4.5. Internal Versus External Clients
NIS : (see NIS)
port numbers : Building Internet Firewalls, 8. Configuring Internet Services
software for proxying : Building Internet Firewalls, 7.2.1. Using Custom Client Software for

client statement : TCP/IP Network Administration, B.8.10. The routerdiscovery Statement

client.cf : sendmail, A. The client.cf File

client/server model : Practical UNIX & Internet Security, 16.2.5. Clients and Servers

${client_addr} macro : sendmail, 31.10. Alphabetized Reference

${client_name} macro : sendmail, 31.10. Alphabetized Reference

clock, system

Practical UNIX & Internet Security, 5.1.5. File Times
Practical UNIX & Internet Security, 17.3.14. Network Time Protocol (NTP) (UDP Port 123)
configuring : Building Internet Firewalls, 8.13. Network Time Protocol (NTP)
for random seeds : Practical UNIX & Internet Security, 23.8. Picking a Random Seed
resetting : Practical UNIX & Internet Security, 9.2.3. Checksums and Signatures
setting : Building Internet Firewalls, 2.11. Time Service
Secure RPC timestamp : Practical UNIX & Internet Security, 19.3.1.3. Setting the window

clogging : Practical UNIX & Internet Security, 25.3.4. Clogging

CNAME resource records

sendmail, 21.3.2. MX to CNAME Causes Extra Lookups
sendmail, 34.8. Alphabetized Reference
TCP/IP Network Administration, 8.3.6. The named.hosts File
TCP/IP Network Administration, 10.7.1. Modifying Local Information
TCP/IP Network Administration, C.3.1.5. Canonical Name record

CNID (Caller-ID)

Practical UNIX & Internet Security, 14.4.3. Caller-ID (CNID)
Practical UNIX & Internet Security, 14.6. Additional Security for Modems
Practical UNIX & Internet Security, 24.2.4. Tracing a Connection

CO2 system (for fires) : Practical UNIX & Internet Security, 12.2.1.1. Fire

COAST (Computer Operations, Audit, and Security Technology)

Building Internet Firewalls, A.1.2. COAST
Building Internet Firewalls, A.2.1. coast.cs.purdue.edu
Practical UNIX & Internet Security, E.3.2. COAST
Practical UNIX & Internet Security, E.4. Software Resources

code breaking : (see cryptography)

codebooks : Practical UNIX & Internet Security, 8.7.3. Code Books

CodeCenter : Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs

codes : (see numbers)

cold, extreme : Practical UNIX & Internet Security, 12.2.1.6. Temperature extremes

Collis field : TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat

collision rate

TCP/IP Network Administration, 6.1.1. Determining the Interface Name
TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat
reducing : TCP/IP Network Administration, 11.4.4. Subdividing an Ethernet

colon (:)

in addresses

sendmail, 17.1.2.1. A rule to handle List:;
sendmail, 34.8. Alphabetized Reference

beginning and ending fields

TCP/IP Network Administration, 9.2.1. The printcap File
TCP/IP Network Administration, 9.2.2. Solaris Line Printer Service

separating parameters : TCP/IP Network Administration, 9.4. A BOOTP Server

ColonOkInAddr option : sendmail, 34.8. Alphabetized Reference

columns, database key

sendmail, 33.3.4.4. -k specify column for key (V8.7 and above)
sendmail, 33.3.4.11. -v specify the value's column (V8.7 and above)

com domain : TCP/IP Network Administration, 3.3.1. The Domain Hierarchy

command channel attacks : Building Internet Firewalls, 8.1. Electronic Mail

command execution : Building Internet Firewalls, 2.3. Remote Terminal Access and Command

command line : sendmail, 4. How to Run sendmail

bugs : Building Internet Firewalls, 8.1. Electronic Mail
processing : sendmail, 36.4. Processing the Command Line
troubleshooting : sendmail, 36.6. Pitfalls

command shells : (see shells)

commands

Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command

(see also under specific command name)

accounts running single : Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command

in addresses : Practical UNIX & Internet Security, 15.7. Early Security Problems with UUCP

configuration

sendmail, 5.1. Overview
sendmail, 27.1. Overall Syntax

in <Directory> blocks : Practical UNIX & Internet Security, 18.3.2. Commands Within the <Directory>

editor, embedded : Practical UNIX & Internet Security, 11.5.2.7. Other initializations

incorrect usage error : sendmail, 36.5.10. EX_USAGE A Command Was Used Incorrectly

remote execution of

Practical UNIX & Internet Security, 15.1.2. uux Command
Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
Practical UNIX & Internet Security, 17.3.17. rexec (TCP Port 512)

running simultaneously

Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
(see also multitasking)

COMMANDS= command : Practical UNIX & Internet Security, 15.5.2. Permissions Commands

commenting out lines : Building Internet Firewalls, 5.8.2.2. How to disable services

commenting out services : Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services

comments

sendmail, 5.2.2. Comments

sendmail, 6.3.2. Adding Comments

in BNU UUCP : Practical UNIX & Internet Security, 15.5.1.3. A Sample Permissions file

in header fields : sendmail, 35.3.4. Comments in the Header Field

in :include: lists : sendmail, 25.2.1. Comments in :include: Lists

in m4 files : sendmail, 19.5. Pitfalls

in rule definitions : sendmail, 8.4. Rules

in sendmail.cf file

sendmail, 3.1. Role in the Filesystem
sendmail, 5.1. Overview
sendmail, 27.2. Comments

stripping from headers : sendmail, 30.8. Alphabetized F= Flags

"Comments:" header line : sendmail, 35.10. Alphabetized Reference

commercial authentication systems : Building Internet Firewalls, 10.4.3. Commercial Solutions

Commercial Information Exchange (CIX) : TCP/IP Network Administration, 1.1. TCP/IP and the Internet

Common Gateway Interface (CGI)

Building Internet Firewalls, 8.6.3.1. What can a malicious client do to

Practical UNIX & Internet Security, 18.1. Security and the World Wide Web

scripts

Practical UNIX & Internet Security, 18.2. Running a Secure Server
Practical UNIX & Internet Security, 18.2.3. Writing Secure CGI Scripts and ProgramsThe
Practical UNIX & Internet Security, 18.2.4.1. Beware mixing HTTP with anonymous FTP

communications

interpersonal : (see email)
modems : (see modems)
national telecommunications : Practical UNIX & Internet Security, 26.2.2. Federal Jurisdiction
threatening : Practical UNIX & Internet Security, 26.4.7. Harassment, Threatening Communication, and Defamation

comp.security newsgroups : TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information

comparison copies

Practical UNIX & Internet Security, 9.2.1. Comparison Copies
Practical UNIX & Internet Security, 9.2.1.3. rdist

compatibility between sendmail versions

sendmail, 5.2.1. Version
sendmail, 27.5. The V Configuration Command
sendmail, D.2. Backward Compatibility

compiling db library package : sendmail, C.3. Compile and Install

compiling sendmail : sendmail, 2.5. Build

enabling databases : sendmail, 33.1. Enable at Compile Time
macros for : sendmail, 18.8. Alphabetized Reference
vendor copies versus : sendmail, 18.2. Vendor Versus Compiling

completion, command option : sendmail, 34.1.2.1. Multicharacter name shorthand

compress program : Practical UNIX & Internet Security, 6.6.1.2. Ways of improving the security of crypt

Compressed SLIP (CSLIP) : Practical UNIX & Internet Security, 16.2. IPv4: The Internet Protocol Version 4

Computer Emergency Response Committee for Unclassified Systems (CERCUS) : Practical UNIX & Internet Security, F.3.4.36. TRW Network Area and System Administrators

Computer Emergency Response Team (CERT) advisories

Practical UNIX & Internet Security, 6.5.2. Using Message Digests
Practical UNIX & Internet Security, 27.3.5. Response Personnel?
Practical UNIX & Internet Security, F.3.4.1. All Internet sites
TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information
CERT-NL (Netherlands) : Practical UNIX & Internet Security, F.3.4.25. Netherlands: German government institutions
mailing list for : Practical UNIX & Internet Security, E.1.3.4. CERT-advisory

Computer Incident Advisory Capability (CIAC) : Practical UNIX & Internet Security, F.3.4.43. U.S. Department of Energy

computer networks : Practical UNIX & Internet Security, 1.4.3. Add-On Functionality Breeds Problems

Computer Security Institute (CSI) : Practical UNIX & Internet Security, F.1.3. Computer Security Institute (CSI)

Computer Security Resource Clearinghouse : TCP/IP Network Administration, 13.1. The World Wide Web

computers

assigning UUCP name : Practical UNIX & Internet Security, 15.5.2. Permissions Commands

auxiliary ports : Practical UNIX & Internet Security, 12.3.1.4. Auxiliary ports on terminals

backing up individual : Practical UNIX & Internet Security, 7.2.1. Individual Workstation

computer-to-computer services, providing : TCP/IP Network Administration, 9. Configuring Network Servers

contacting administrator of : Practical UNIX & Internet Security, 24.2.4.2. How to contact the system administrator of a computer

cutting cables to : Practical UNIX & Internet Security, 25.1. Destructive Attacks

failure of : Practical UNIX & Internet Security, 7.1.1.1. A taxonomy of computer failures

hostnames for

Practical UNIX & Internet Security, 16.2.3. Hostnames
Practical UNIX & Internet Security, 16.2.3.1. The /etc/hosts file

modems : (see modems)

multiple screens : Practical UNIX & Internet Security, 12.3.4.3. Multiple screens

multiple suppliers of : Practical UNIX & Internet Security, 18.6. Dependence on Third Parties

non-citizen access to : Practical UNIX & Internet Security, 26.4.1. Munitions Export

operating after breakin : Practical UNIX & Internet Security, 24.6. Resuming Operation

portable : Practical UNIX & Internet Security, 12.2.6.3. Portables

remote command execution : Practical UNIX & Internet Security, 17.3.17. rexec (TCP Port 512)

running NIS+ : Practical UNIX & Internet Security, 19.5.5. NIS+ Limitations

screen savers : Practical UNIX & Internet Security, 12.3.5.2. X screen savers

security

culture of : Practical UNIX & Internet Security, D.1.10. Understanding the Computer Security "Culture"
four steps toward : Practical UNIX & Internet Security, 2.4.4.7. Defend in depth
physical : Practical UNIX & Internet Security, 12.2.6.1. Physically secure your computer
references for : Practical UNIX & Internet Security, D.1.7. General Computer Security
resources on : Practical UNIX & Internet Security, D.1.1. Other Computer References

seized as evidence : Practical UNIX & Internet Security, 26.2.4. Hazards of Criminal Prosecution

transferring files between : Practical UNIX & Internet Security, 15.1.1. uucp Command

trusting

Practical UNIX & Internet Security, 27.1. Can you Trust Your Computer?
Practical UNIX & Internet Security, 27.1.3. What the Superuser Can and Cannot Do

unattended

Practical UNIX & Internet Security, 12.3.5. Unattended Terminals
Practical UNIX & Internet Security, 12.3.5.2. X screen savers

unplugging : Practical UNIX & Internet Security, 24.2.5. Getting Rid of the Intruder

vacuums for : Practical UNIX & Internet Security, 12.2.1.3. Dust

vandalism of : (see vandalism)

virtual : (see Telnet service)

viruses : (see viruses)

computing base (TCB) : Practical UNIX & Internet Security, 8.5.3.2. Trusted computing base

conditionals in macro definitions

sendmail, 14.1.3. Testing So Far
sendmail, 31.6. Macro Conditionals: $?, $|, and $.
TCP/IP Network Administration, 10.5.2.1. Conditionals

conf directory

Practical UNIX & Internet Security, 18.2.2.1. Configuration files

TCP/IP Network Administration, 5.3. The BSD Kernel Configuration File

conf/access.conf : (see access.conf file)

conf/master directory : TCP/IP Network Administration, 8.3.4. The named.local File

conf/srm.conf file : Practical UNIX & Internet Security, 18.3.1. The access.conf and .htaccess Files

conf.c file

sendmail, 18.3.3. What to Tune
sendmail, 35.5. Header Behavior in conf.c

conf.h file : sendmail, 18.3.3. What to Tune

conferencing services, real-time

Building Internet Firewalls, 2.8. Real-Time Conferencing
Building Internet Firewalls, 8.9. Real-Time Conferencing Services

confidence factor : TCP/IP Network Administration, 11.1.1. Troubleshooting Hints

confidentiality : (see encryption; privacy)

configuration

Archie : Building Internet Firewalls, 8.7.3. Archie

audit packages : Building Internet Firewalls, 5.8.5.2. Use the auditing packages

clocks : Building Internet Firewalls, 8.13. Network Time Protocol (NTP)

commands for

sendmail, 5.1. Overview
sendmail, 27.1. Overall Syntax

DNS (Domain Name Service) : Building Internet Firewalls, 8.10. Domain Name System

in screened host architecture : Building Internet Firewalls, 9.2.1.6. DNS
in screened subnet architecture : Building Internet Firewalls, 9.1.1.6. DNS

email : Building Internet Firewalls, 8.1. Electronic Mail

errors : Practical UNIX & Internet Security, 9.1. Prevention

exterior routers : Building Internet Firewalls, 9.1.2.2. Exterior Router

files : Practical UNIX & Internet Security, 11.5.3. Abusing Automatic Mechanisms

logging : Practical UNIX & Internet Security, 10.7.2.2. Informational material
MCSA web server : Practical UNIX & Internet Security, 18.2.2.1. Configuration files
UUCP version differences : Practical UNIX & Internet Security, 15.2. Versions of UUCP

FSP (File Service Protocol) : Building Internet Firewalls, 8.2.3. File Service Protocol (FSP)

FTP (File Transfer Protocol) : Building Internet Firewalls, 8.2.1. File Transfer Protocol

in screened host architecture : Building Internet Firewalls, 9.2.1.2. FTP
in screened subnet architecture : Building Internet Firewalls, 9.1.1.2. FTP

Gopher : Building Internet Firewalls, 8.7.1. Gopher

hardware : Building Internet Firewalls, 5.3.3. What Hardware Configuration?

HTTP (Hypertext Transfer Protocol)

in screened host architecture : Building Internet Firewalls, 9.2.1.5. HTTP
in screened subnet architecture : Building Internet Firewalls, 9.1.1.5. HTTP

hub : sendmail, 15.4. Hub Accepts Mail for Client

information lookup services : Building Internet Firewalls, 8.8. Information Lookup Services

interior router : Building Internet Firewalls, 9.1.2.1. Interior Router

Internet services : Building Internet Firewalls, 8. Configuring Internet Services

IRC (Internet Relay Chat) : Building Internet Firewalls, 8.9.2. Internet Relay Chat

kernel : Building Internet Firewalls, 5.8.4.1. Reconfigure and rebuild the kernel

labeling system : Building Internet Firewalls, 13.5.2. Labeling and Diagraming Your System

machine : Building Internet Firewalls, 5.8.4. Reconfiguring for Production

MBONE (Multicast Backbone) : Building Internet Firewalls, 8.9.3. The Multicast Backbone (MBONE)

network management services : Building Internet Firewalls, 8.12. Network Management Services

NFS (Network File System) : Building Internet Firewalls, 8.14. Network File System

NIS/YP (Network Information Service) : Building Internet Firewalls, 8.15. Network Information Service/Yellow

NNTP (Network News Transfer Protocol) : Building Internet Firewalls, 8.5. Network News Transfer Protocol

in screened host architecture : Building Internet Firewalls, 9.2.1.4. NNTP
in screened subnet architecture : Building Internet Firewalls, 9.1.1.4. NNTP

packet filtering router : Building Internet Firewalls, 6.2. Configuring a Packet Filtering

parameters for (in dhcpd) : TCP/IP Network Administration, D.3.2. Configuration Parameters

ping program : Building Internet Firewalls, 8.12.3. ping

printing protocols : Building Internet Firewalls, 8.17. Printing Protocols (lpr and lp)

problems : TCP/IP Network Administration, 11.4.1. Troubleshooting with the ifconfig Command

r commands : Building Internet Firewalls, 8.4.1. BSD

real-time conferencing services : Building Internet Firewalls, 8.9. Real-Time Conferencing Services

RIP (Routing Information Protocol) : Building Internet Firewalls, 8.12.2. Routing Information Protocol

sendmail

sendmail, 2.4. Preliminaries
sendmail, 18.6. Install sendmail
sendmail, 19.6. Alphabetized m4 Macros
(see also sendmail.cf configuration file)

servers : TCP/IP Network Administration, 3.5. Configuration Servers

simplifying management of : Practical UNIX & Internet Security, 9.1.2. Read-only Filesystems

SMTP (Simple Mail Transfer Protocol)

in screened host architecture : Building Internet Firewalls, 9.2.1.3. SMTP
in screened subnet architecture : Building Internet Firewalls, 9.1.1.3. SMTP
with firewalls : Building Internet Firewalls, 8.1.1.6. Configuring SMTP to

SNMP (Simple Network Management Protocol) : Building Internet Firewalls, 8.12.1. Simple Network Management

syslog : Building Internet Firewalls, 8.11. syslog

system, prerequisites for : TCP/IP Network Administration, 4. Getting Started

Telnet : Building Internet Firewalls, 8.3. Terminal Access (Telnet)

in screened host architecture : Building Internet Firewalls, 9.2.1.1. Telnet
in screened subnet architecture : Building Internet Firewalls, 9.1.1.1. Telnet

TFTP (Trivial File Transport Protocol) : Building Internet Firewalls, 8.2.2. Trivial File Transfer Protocol

TNP (Network Time Protocol) : Building Internet Firewalls, 8.13. Network Time Protocol (NTP)

traceroute program : Building Internet Firewalls, 8.12.4. traceroute

UUCP (UNIX-to-UNIX Copy Protocol) : Building Internet Firewalls, 8.2.4. UNIX-to-UNIX

WAIS (Wide Area Information Servers) : Building Internet Firewalls, 8.7.2. Wide Area Information Servers

WWW (World Wide Web) and HTTP : Building Internet Firewalls, 8.6. World Wide Web (WWW) and HTTP

X11 Window wystem : Building Internet Firewalls, 8.16. X11 Window System

connection cache

sendmail, 26.3.3.2. -- connection cache: --
sendmail, 34.6.5. Connection Caching

connection command-line option, in pppd : TCP/IP Network Administration, 6.3.3. chat

"Connection timed out" message : sendmail, 4.2. Verbose (-v)

ConnectionCacheSize (k) option : sendmail, 34.8. Alphabetized Reference

ConnectionCacheTimeout (K) option : sendmail, 34.8. Alphabetized Reference

ConnectionRateThrottle option : sendmail, 34.8. Alphabetized Reference

connections

between Internet and unbuilt bastion host : Building Internet Firewalls, 5.8. Building a Bastion Host

checking network : (see ping command)

disconnecting after incident : Building Internet Firewalls, 13.1.2. Disconnect or Shut Down, as

disconnecting machine : Building Internet Firewalls, 13.4.3. Planning for Disconnecting or

hijacking : Practical UNIX & Internet Security, 16.3. IP Security

killed by TCP : Building Internet Firewalls, 6.3.3.1. TCP

laundering : Practical UNIX & Internet Security, 16.1.1.1. Who is on the Internet?

multiple Internet : Building Internet Firewalls, 4.3.6. It's OK to Use

tracing

Practical UNIX & Internet Security, 24.2.4. Tracing a Connection
Practical UNIX & Internet Security, 24.2.4.2. How to contact the system administrator of a computer

unidirectional versus multidirectional : Building Internet Firewalls, 7.4.2. Unidirectional Versus Multidirectional

unplugging : Practical UNIX & Internet Security, 24.2.5. Getting Rid of the Intruder

connectivity

TCP/IP Network Administration, 1.7. Application Layer
(see also firewalls)
troubleshooting : TCP/IP Network Administration, 11.3. Testing Basic Connectivity

connectors, network : Practical UNIX & Internet Security, 12.2.4.3. Network connectors

consistency of software : Practical UNIX & Internet Security, 2.1. Planning Your Security Needs

console device : Practical UNIX & Internet Security, 5.6. Device Files

CONSOLE variable : Practical UNIX & Internet Security, 8.5.1. Secure Terminals

constraining passwords : Practical UNIX & Internet Security, 8.8.2. Constraining Passwords

consultants : Practical UNIX & Internet Security, 27.3.4. Your Consultants?

content types : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

"Content-Length:" header line

sendmail, 35.10. Alphabetized Reference
sendmail, D. Sun Enhancements

"Content-Transfer-Encoding:" header line

sendmail, 35.10. Alphabetized Reference
TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

"Content-Type:" header line

sendmail, 30.4. The Equates
sendmail, 32.5. Alphabetized Reference
sendmail, 34.8. Alphabetized Reference
sendmail, 35.10. Alphabetized Reference
TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions

context-dependent files (CDFs)

Practical UNIX & Internet Security, 5.9.2. Context-Dependent Files
Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories

contiguous blocks : (see addresses, assigning)

continuation lines : sendmail, 27.4. Continuation Lines

control

information : TCP/IP Network Administration, 1.3. TCP/IP Protocol Architecture
statements (in gated) : TCP/IP Network Administration, B.10. Control Statements

control characters

Practical UNIX & Internet Security, 3.1. Usernames
sendmail, 23.3.4. Unknown Control Character in qf File

control headers : sendmail, 35.6.4. Identification and Control Headers

convergence of routing, delays in : TCP/IP Network Administration, 7.4.1.1. Running RIP with routed

converting

Japanese font conversion : sendmail, 36.7. Alphabetized Reference
macro names to integers : sendmail, 20.3. Alphabetized V8.8 Subroutines

cookies

Practical UNIX & Internet Security, 17.3.21.4. Using Xauthority magic cookies
Practical UNIX & Internet Security, 18.2.3.1. Do not trust the user's browser!

COPS (Computer Oracle and Password System)

Building Internet Firewalls, B.2.1. COPS
Practical UNIX & Internet Security, 19.5.5. NIS+ Limitations
Practical UNIX & Internet Security, E.4.3. COPS (Computer Oracle and Password System)COPS
TCP/IP Network Administration, 12.4.3.1. COPS
auditing package : Building Internet Firewalls, 5.8.5.1. Auditing packages

copy (cp) command, in NFS : TCP/IP Network Administration, 9.1. The Network File System

copying

bounced messages to postmaster : sendmail, 22.8.3.4. The PostmasterCopy option
messages to postmaster : sendmail, 24.4.1. The Postmaster Alias
qf file temporarily : sendmail, 23.2.6. The Temporary qf Rewrite Image: tf

copyright

Practical UNIX & Internet Security, 9.2.1. Comparison Copies
Practical UNIX & Internet Security, 26.4.2. Copyright Infringement
Practical UNIX & Internet Security, 26.4.2.1. Software piracy and the SPA
notices of : Practical UNIX & Internet Security, 26.2.6. Other Tips

CORBA (Common Object Request Broker Architecture) : Practical UNIX & Internet Security, 19.2. Sun's Remote Procedure Call (RPC)

core files

Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
Practical UNIX & Internet Security, C.4. The kill Command

core gateways

TCP/IP Network Administration, 2.4. Internet Routing Architecture
TCP/IP Network Administration, 7.5.1. Exterior Gateway Protocol

cost : (see preference)

cost-benefit analysis

Practical UNIX & Internet Security, 2.3. Cost-Benefit Analysis
Practical UNIX & Internet Security, 2.3.4. Convincing Management

costs of losses : Practical UNIX & Internet Security, 2.3.1. The Cost of Loss

"could not exec" error : sendmail, 26.3.2. SIGHUP Restart

count field : TCP/IP Network Administration, 11.3.1. The ping Command

count-to-infinity problem : TCP/IP Network Administration, 7.4.1.1. Running RIP with routed

cp command : Practical UNIX & Internet Security, 7.4.1. Simple Local Copies

cpio program

Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
Practical UNIX & Internet Security, 7.4.2. Simple Archives

crack program

Practical UNIX & Internet Security, 8.8.3. Cracking Your Own Passwords
Practical UNIX & Internet Security, 18.3.3. Setting Up Web Users and Passwords

cracking

backing up because of : Practical UNIX & Internet Security, 7.1.1.1. A taxonomy of computer failures

passwords

Practical UNIX & Internet Security, 3.6.1. Bad Passwords: Open Doors
Practical UNIX & Internet Security, 3.6.4. Passwords on Multiple Machines
Practical UNIX & Internet Security, 8.6.1. The crypt()
Practical UNIX & Internet Security, 8.8.3. Cracking Your Own Passwords
Practical UNIX & Internet Security, 8.8.3.2. The dilemma of password crackers
Practical UNIX & Internet Security, 17.3.3. TELNET (TCP Port 23)
logging failed attempts : Practical UNIX & Internet Security, 10.5.3. syslog Messages

responding to

Practical UNIX & Internet Security, 24. Discovering a Break-in
Practical UNIX & Internet Security, 24.7. Damage Control

using rexecd : Practical UNIX & Internet Security, 17.3.17. rexec (TCP Port 512)

crash : Building Internet Firewalls, 5.10.1. Watch Reboots Carefully

logging crashes : Practical UNIX & Internet Security, 10.7.2.1. Exception and activity reports
resetting locks after : TCP/IP Network Administration, 9.1.1. NFS Daemons
restarting after : TCP/IP Network Administration, 9.2.2. Solaris Line Printer Service

CRC (cyclic redundancy counter) : (see checksums)

Cred table (NIS+) : Practical UNIX & Internet Security, 19.5.3. NIS+ Tables

criminal prosecution

Practical UNIX & Internet Security, 26.2. Criminal Prosecution
Practical UNIX & Internet Security, 26.2.7. A Final Note on Criminal Actions

crises : (see disasters and disaster recovery)

cron file

Practical UNIX & Internet Security, 9.2.2.1. Simple listing
Practical UNIX & Internet Security, 11.5.1.4. Filename attacks
Practical UNIX & Internet Security, 11.5.3.1. crontab entries
Practical UNIX & Internet Security, 15.6.2. Automatic Execution of Cleanup Scripts
automating backups : Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
cleaning up /tmp directory : Practical UNIX & Internet Security, 25.2.4. /tmp Problems
collecting login times : Practical UNIX & Internet Security, 10.1.1. lastlog File
security checks : TCP/IP Network Administration, 12.4.2. Looking for Trouble
statistics and : sendmail, 26.2.3. Using cron for Daily and Weekly Statistics
symbolic links in : Practical UNIX & Internet Security, 10.3.7. Other Logs
system clock and : Practical UNIX & Internet Security, 17.3.14. Network Time Protocol (NTP) (UDP Port 123)
uucp scripts in : Practical UNIX & Internet Security, 15.6.2. Automatic Execution of Cleanup Scripts

crtscts option : TCP/IP Network Administration, 6.3.1. The PPP Daemon

Crypt Breaker's Workbench (CBW) : Practical UNIX & Internet Security, 6.6.1.1. The crypt program

crypt command/algorithm

Building Internet Firewalls, 5.8.2.2. How to disable services
Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems
Practical UNIX & Internet Security, 6.6.1. UNIX crypt: The Original UNIX Encryption Command
Practical UNIX & Internet Security, 6.6.1.3. Example
Practical UNIX & Internet Security, 8.6. The UNIX Encrypted Password System
Practical UNIX & Internet Security, 8.6.1. The crypt()
Practical UNIX & Internet Security, 8.8.7. Algorithm and Library Changes
Practical UNIX & Internet Security, 18.3.3. Setting Up Web Users and Passwords
Practical UNIX & Internet Security, 23.5. Tips on Using Passwords

crypt16 algorithm : Practical UNIX & Internet Security, 8.6.4. Crypt16() and Other Algorithms

crypto-checksum : TCP/IP Network Administration, 7.4.3. Open Shortest Path First

cryptography

Building Internet Firewalls, 10. Authentication and Inbound

Practical UNIX & Internet Security, 6. Cryptography

Practical UNIX & Internet Security, 6.7.2. Cryptography and Export Controls

Practical UNIX & Internet Security, 14.4.4.2. Protection against eavesdropping

checklist for : Practical UNIX & Internet Security, A.1.1.5. Chapter 6: Cryptography

checksums

Building Internet Firewalls, 5.8.5.3. About checksums for auditing

Practical UNIX & Internet Security, 6.5.5.1. Checksums

Practical UNIX & Internet Security, 9.2.3. Checksums and Signatures

TCP/IP Network Administration, 1.6.2. Transmission Control Protocol

TCP/IP Network Administration, 11.8. Protocol Case Study

keeping secure : Building Internet Firewalls, 13.5.3. Keeping Secured Checksums

recalculating

TCP/IP Network Administration, 4.2.1. Obtaining an IP Address
TCP/IP Network Administration, 5.3.1.1. Options

using Tripwire for : Building Internet Firewalls, 5.8.5.1. Auditing packages

digital signatures : (see digital signatures)

export laws concerning : Practical UNIX & Internet Security, 6.7.2. Cryptography and Export Controls

Message Authentication Codes (MACs) : Practical UNIX & Internet Security, 6.5.5.2. Message authentication codes

message digests : (see message digests)

PGP : (see PGP)

private-key

Practical UNIX & Internet Security, 6.4. Common Cryptographic Algorithms
Practical UNIX & Internet Security, 6.4.1. Summary of Private Key Systems
TCP/IP Network Administration, 12.6. Encryption

public-key

Building Internet Firewalls, 10. Authentication and Inbound
Practical UNIX & Internet Security, 6.4. Common Cryptographic Algorithms
Practical UNIX & Internet Security, 6.4.2. Summary of Public Key Systems
Practical UNIX & Internet Security, 6.4.6. RSA and Public Key Cryptography
Practical UNIX & Internet Security, 6.4.6.3. Strength of RSA
Practical UNIX & Internet Security, 6.5.3. Digital Signatures
Practical UNIX & Internet Security, 18.3. Controlling Access to Files on Your Server
Practical UNIX & Internet Security, 18.6. Dependence on Third Parties
TCP/IP Network Administration, 12.6. Encryption
breaking : Practical UNIX & Internet Security, 19.3.4. Limitations of Secure RPC
PGP : Practical UNIX & Internet Security, 6.6.3.2. Creating your PGP public key
proving identity with : Practical UNIX & Internet Security, 19.3.1.1. Proving your identity

references on : Practical UNIX & Internet Security, D.1.5. Cryptography Books

U.S. patents and : Practical UNIX & Internet Security, 6.7.1. Cryptography and the U.S. Patent System

csh (C shell)

Practical UNIX & Internet Security, 5.5.2. Problems with SUID
Practical UNIX & Internet Security, 11.5.1. Shell Features
Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
Practical UNIX & Internet Security, C.5.3. Running the User's Shell
(see also shells)
autologout variable : Practical UNIX & Internet Security, 12.3.5.1. Built-in shell autologout
history file : Practical UNIX & Internet Security, 10.4.1. Shell History
uucp command : Practical UNIX & Internet Security, 15.1.1.1. uucp with the C shell

.cshrc file

Practical UNIX & Internet Security, 11.5.2.2. .cshrc, .kshrc
Practical UNIX & Internet Security, 12.3.5.1. Built-in shell autologout
Practical UNIX & Internet Security, 24.4.1.6. Changes to startup files

CSI (Computer Security Institute) : Practical UNIX & Internet Security, F.1.3. Computer Security Institute (CSI)

CSLIP (Compressed SLIP)

Practical UNIX & Internet Security, 16.2. IPv4: The Internet Protocol Version 4
TCP/IP Network Administration, 5.2. Linux Kernel Configuration
TCP/IP Network Administration, 6.4.1. slattach
disabling : TCP/IP Network Administration, A.2. The PPP Daemon

CSRC (Computer Security Resource Clearinghouse) : Building Internet Firewalls, A.5.3. NIST CSRC

-Ctest.cf argument : TCP/IP Network Administration, 10.8. Testing sendmail.cf

ctime

Practical UNIX & Internet Security, 5.1.2. Inodes
Practical UNIX & Internet Security, 5.1.5. File Times
Practical UNIX & Internet Security, 5.2.1. chmod: Changing a File's Permissions
Practical UNIX & Internet Security, 7.4.7. inode Modification Times
Practical UNIX & Internet Security, 9.2.3. Checksums and Signatures

cu command

Practical UNIX & Internet Security, 14.5. Modems and UNIX
Practical UNIX & Internet Security, 14.5.3.1. Originate testing
Practical UNIX & Internet Security, 14.5.3.3. Privilege testing
-l option : Practical UNIX & Internet Security, 14.5.3.1. Originate testing

cua devices : TCP/IP Network Administration, 6.4.4. Troubleshooting Serial Connections

culture, computer security : Practical UNIX & Internet Security, D.1.10. Understanding the Computer Security "Culture"

curly braces ({})

sendmail, 5.3.2. Macros

sendmail, 5.3.5. Class Macros

sendmail, 7.1. Overview

configuration statements

TCP/IP Network Administration, 7.7.1.1. A host configuration
TCP/IP Network Administration, B.2. The gated Configuration Language
TCP/IP Network Administration, D.3. The dhcpd.conf Configuration File

long variable names : TCP/IP Network Administration, 10.5. sendmail Configuration

macro names : TCP/IP Network Administration, 10.5.2. The Define Macro Command

current

date : (see $d macro)
directory : Practical UNIX & Internet Security, 5.1.3. Current Directory and Paths
time and date : (see $b macro)

custom

client software for proxying : Building Internet Firewalls, 7.2.1. Using Custom Client Software for
system : Building Internet Firewalls, 13.1.6. Restore and Recover
user procedures for proxying : Building Internet Firewalls, 7.2.2. Using Custom User Procedures for

Customer Warning System (CWS) : Practical UNIX & Internet Security, F.3.4.34. Sun Microsystems

customizing sendmail temporarily : sendmail, 19.6. Alphabetized m4 Macros

cyclic redundancy counter (CRC) : Building Internet Firewalls, 5.8.5.3. About checksums for auditing

cyrus and cyrusbb mailers : TCP/IP Network Administration, E.3.5. MAILER

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