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Index: D

DAC (Discretionary Access Controls) : Groups and Group Identifiers (GIDs)
daemon (user) : Users and Groups
damage, liability for : Liability for Damage
DARPA : (see ARPA)
DAT (Digital Audio Tape) : Guarding Against Media Failure
data
- assigning owners to : Assign an owner
- availability of : Planning Your Security Needs
- communication equipment (DCE) : The RS-232 Serial Protocol
- confidential
- - Planning Your Security Needs
  - Confidential Information
- disclosure of : Damage
- giving away with NIS : Unintended Disclosure of Site Information with NIS
- identifying assets : Identifying assets
- integrity of : (see integrity, data)
- spoofing : IP Security
- terminal equipment (DTE) : The RS-232 Serial Protocol
Data Carrier Detect (DCD) : The RS-232 Serial Protocol
Data Defense Network (DDN) : MILNET
Data Encryption Standard : (see DES)
Data Set Ready (DSR) : The RS-232 Serial Protocol
Data Terminal Ready (DTR) : The RS-232 Serial Protocol
database files : What Is an Operating System?
databases : (see network databases)
date command
- Accounts That Run a Single Command
- Never Trust Anything Except Hardcopy
day-zero backups : Types of Backups
dbx debugger : The kill Command
DCE (data communication equipment) : The RS-232 Serial Protocol
DCE (Distributed Computing Environment)
- The /etc/passwd File and Network Databases
- Code Books
- Other naming services
- Sun's Remote Procedure Call (RPC)
- DCE
dd command
- Ways of improving the security of crypt
- Simple Local Copies
DDN (Data Defense Network) : MILNET
deadlock : Tips on Avoiding Security-related Bugs
debug command : Using sendmail to receive email
debugfs command : Tree-structure attacks
DEC (Digital Equipment Corporation) : Digital Equipment Corporation and customers
DECnet protocol : DECnet
decode aliases : Using sendmail to receive email
decryption : (see encryption)
defamation : Harassment, Threatening Communication, and Defamation
default
- accounts : Default Accounts
- deny : Default Permit vs. Default Deny
- domain : Hostnames
- permit : Default Permit vs. Default Deny
defense in depth : (see multilevel security)
DELETE key : Changing Your Password
deleting
- destructive attack via : Destructive Attacks
- files : Using Directory Permissions
demo accounts : Default Accounts
denial-of-service attacks
- Role of this tutorial
- Denial of Service Attacks and Solutions
- Clogging
- accidental : Soft Process Limits: Preventing Accidental Denial of Service
- automatic lockout : Entering Your Password
- checklist for : Denial of Service Attacks and Solutions
- inodes : Inode problems
- internal inetd services : The /etc/inetd Program
- on networks
- - Network Denial of Service Attacks
  - Clogging
- via syslog : The syslog.conf Configuration File
- X Window System : Denial of service attacks under X
departure of employees : Departure
depository directories, FTP : Setting up anonymous FTP with the standard UNIX FTP server
DES (Data Encryption Standard)
- Summary of Private Key Systems
- DES
- Triple DES
- The crypt() Algorithm
- authentication (NIS+) : Using NIS+
- improving security of
- - Improving the Security of DES
  - Triple DES
des program
- DES
- des: The Data Encryption Standard
- Encrypting Your Backups
destroying media : Sanitize your media before disposal
destructive attacks : Destructive Attacks
detached signatures : PGP detached signatures
detectors
- cable tampering : Wiretapping
- carbon-monoxide : Smoke
- humidity : Humidity
- logging alarm systems : Exception and activity reports
- smoke : Smoke
- temperature alarms : Temperature extremes
- water sensors : Water
Deutsches Forschungsnetz : Germany: DFN-WiNet Internet sites
/dev directory : Hooking Up a Modem to Your Computer
- /dev/audio device : Picking a Random Seed
- /dev/console device : Device Files
- /dev/kmem device
- - Device Files
  - Back Doors and Trap Doors
- /dev/null device : Device Files
- /dev/random device : Other random number generators
- /dev/swap device : SUID, SGID, and Sticky Bits
- /dev/urandom device : Other random number generators
device files : Device Files
devices
- managing with SNMP : Simple Network Management Protocol (SNMP) (UDP Ports 161 and 162)
- modem control : Setting Up the UNIX Device
Devices file : Hooking Up a Modem to Your Computer
df -i command : Inode problems
dictionary attack : The crypt() Algorithm
Diffie-Hellman key exchange system
- Summary of Public Key Systems
- Dependence on Third Parties
- Secure RPC (AUTH_DES)
- breaking key : Limitations of Secure RPC
- exponential key exchange : Secure RPC Authentication
Digital Audio Tape (DAT) : Guarding Against Media Failure
digital computers : Cryptography and Digital Computers
Digital Equipment Corporation (DEC) : Digital Equipment Corporation and customers
Digital Signature Algorithm : (see DSA)
digital signatures
- Common Cryptographic Algorithms
- Message Digests and Digital Signatures
- Message authentication codes
- Checksums and Signatures
- checksums : Checksums
- detached signatures : PGP detached signatures
- with PGP : Adding a digital signature to an announcement
Digital UNIX
- History of UNIX
- (see also Ultrix)
directories
- Directories
- Current Directory and Paths
- ancestor : Ancestor directories
- backing up by : Types of Backups
- CDFs (context-dependent files) : Hidden files and directories
- checklist for : The UNIX Filesystem
- dot, dot-dot, and / : Directories
- FTP depositories : Setting up anonymous FTP with the standard UNIX FTP server
- immutable : Immutable and Append-Only Files
- listing automatically (Web) : Additional configuration issues
- mounted : Turning Off SUID and SGID in Mounted Filesystems
- mounting secure : Mounting a secure filesystem
- nested : Tree-structure attacks
- NFS : (see NFS)
- permissions : Using Directory Permissions
- read-only : Read-only Filesystems
- restricted
- - Restricted Filesystem
  - Checking new software
- root : (see root directory)
- SGI and sticky bits on : SGID and Sticky Bits on Directories
- Web server structure of
- - Understand Your Server's Directory Structure
  - Additional configuration issues
- world-writable : World-writable user files and directories
<Directory> blocks
- The access.conf and .htaccess Files
- Commands Within the <Directory> Block
- Examples
disaster recovery : Minimizing downtime
disk attacks
- Disk Attacks
- Tree-structure attacks
disk quotas : Using quotas
diskettes : (see backups; media)
dismissed employees : Departure
disposing of materials : Other Media
Distributed Computing Environment : (see DCE)
DNS (Domain Name System)
- Name Service
- Other naming services
- Domain Name System (DNS) (TCP and UDP Port 53)
- DNS nameserver attacks
- nameserver attacks : DNS nameserver attacks
- rogue servers : Security and Nameservice
- security and : Security and Nameservice
- zone transfers
- - Domain Name System (DNS) (TCP and UDP Port 53)
  - DNS zone transfers
documentation
- The Problem with Security Through Obscurity
- Tips on Avoiding Security-related Bugs
domain name : Hostnames
Domain Name System : (see DNS)
domainname command : NIS Domains
domains : NIS Domains
dormant accounts
- Managing Dormant Accounts
- Finding Dormant Accounts
dot (.) directory : Directories
dot-dot (..) directory : Directories
Double DES : Improving the Security of DES
double reverse lookup : Security and Nameservice
DOW USA : DOW USA
downloading files : Protecting Local Storage
- logging
- - xferlog Log File
  - access_log Log File
downtime : Minimizing downtime
- due to criminal investigations : Hazards of Criminal Prosecution
- logging : Exception and activity reports
drand48 function : drand48 ( ), lrand48 ( ), and mrand48 ( )
drills, security : Rule #3: PLAN AHEAD
drink : Food and drink
DSA (Digital Signature Algorithm)
- Summary of Public Key Systems
- Digital Signatures
DTE (data terminal equipment) : The RS-232 Serial Protocol
du command : Disk-full attacks
dual universes : Dual Universes
ducts, air : Entrance through air ducts
dump/restore program
- Types of Backups
- Specialized Backup Programs
- Encrypting Your Backups
dumpster diving : Other Media
duress code : Token Cards
dust : Dust

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