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Index: F
- factoring numbers
- 6.4.6. RSA and Public Key Cryptography
- 6.4.6.3. Strength of RSA
- (see also RSA algorithm)
- failed login attempts
: (see logging in)
- failures, computer
- 7.1.1.1. A taxonomy of computer failures
- 23.2. Tips on Avoiding Security-related Bugs
- (see also bugs)
- fair use laws
: 26.4.2. Copyright Infringement
- Fast Filesystem (FFS)
: 25.2.2.6. Reserved space
- FBI (Federal Bureau of Investigation)
- 26.2.2. Federal Jurisdiction
- F.3.2. Federal Bureau of Investigation (FBI)
- fbtab file
: 17.3.21.1. /etc/fbtab and /etc/logindevperm
- Federal Information Processing Standard (FIPS)
: 6.4.2. Summary of Public Key Systems
- federal law enforcement
- 26.2.2. Federal Jurisdiction
- 26.2.3. Federal Computer Crime Laws
- FFS (Fast File System)
: 25.2.2.6. Reserved space
- fgets function
: 23.1.1. The Lesson of the Internet Worm
- fiber optic cables
: (see cables, network)
- File Handles
: 20.1.2. File Handles
- File Transfer Protocol
: (see FTP)
- filenames, attacks via
: 11.5.1.4. Filename attacks
- files
: 5.1. Files
- automatic directory listings
: 18.2.2.2. Additional configuration issues
- backing up
- 7. Backups
- 7.4.7. inode Modification Times
- automatic system for
- 7.3.2. Building an Automatic Backup System
- 18.2.3.5. Beware stray CGI scripts
- critical files
- 7.3. Backing Up System Files
- 7.3.2. Building an Automatic Backup System
- prioritizing
: 7.3.1. What Files to Back Up?
- changing owner of
: 5.7. chown: Changing a File's Owner
- context-dependent (CDFs)
- 5.9.2. Context-Dependent Files
- 24.4.1.7. Hidden files and directories
- core
: C.4. The kill Command
- descriptors
: 23.2. Tips on Avoiding Security-related Bugs
- detecting changes to
- 9.2. Detecting Change
- 9.3. A Final Note
- device
: 5.6. Device Files
- downloading, logs of
- 10.3.3. xferlog Log File
- 10.3.5. access_log Log File
- finding all SUID/SGID
- 5.5.4. Finding All of the SUID and SGID Files
- 5.5.4.1. The ncheck command
- format, monitoring
: 8.2. Monitoring File Format
- group-writable
: 11.6.1.2. Writable system files and directories
- hidden
: 24.4.1.7. Hidden files and directories
- hidden space
: 25.2.2.7. Hidden space
- history
: 10.4.1. Shell History
- immutable
: 9.1.1. Immutable and Append-Only Files
- integrity of
: (see integrity)
- intruder's changes to
: 24.4.1.1. Changes in file contents
- locating largest
: 25.2.2.1. Disk-full attacks
- locking
: 23.2. Tips on Avoiding Security-related Bugs
- log
: (see log files)
- mail sent directly to
: 15.7. Early Security Problems with UUCP
- modification times of
- 5.1.2. Inodes
- 5.1.5. File Times
- 7.4.7. inode Modification Times
- 9.2.2. Checklists and Metadata
- network configuration
: 10.4.3. Network Setup
- permissions to
: (see permissions)
- remote access to
- 15.4.1. USERFILE: Providing Remote File Access
- 15.4.2.1. Some bad examples
- SGID bit on
: 5.5.7. SGID Bit on Files (System V UNIX Only): Mandatory Record Locking
- startup
- 11.5.2. Start-up File Attacks
- 11.5.2.7. Other initializations
- system database
: 1.2. What Is an Operating System?
- transfering between systems
: 15.1.1. uucp Command
- types of
: 5.1.6. Understanding File Permissions
- unowned
: 24.4.1.8. Unowned files
- on Web servers
: (see Web servers)
- world-writable
: 11.6.1.1. World-writable user files and directories
- zero-filled bytes in
: 7.4. Software for Backups
- filesystems
: (see directories)
- filter files (mail)
: 11.5.2.5. .forward, .procmailrc
- filters, air
: 12.2.1.3. Dust
- find command
- 5.5.4. Finding All of the SUID and SGID Files
- 11.5.1.4. Filename attacks
- -H option
: 5.9.2. Context-Dependent Files
- -ls option
: 9.2.2.1. Simple listing
- -size option
: 25.2.2.1. Disk-full attacks
- -H option
: 24.4.1.7. Hidden files and directories
- -print option
: 5.5.4. Finding All of the SUID and SGID Files
- type -f option
: 5.5.4. Finding All of the SUID and SGID Files
- -xdev option
: 5.5.4. Finding All of the SUID and SGID Files
- finger command
- 8.1.3. Accounts That Run a Single Command
- 10.1.1. lastlog File
- 10.1.2. utmp and wtmp Files
- 15.3.1. Assigning Additional UUCP Logins
- 15.4.3. L.cmds: Providing Remote Command Execution
- 17.3.4.3. Improving the security of Berkeley sendmail V8
- 17.3.8. finger (TCP Port 79)
- 17.3.8.3. Replacing finger
- 21.4.4.1. Creating an ftpout account to allow FTP without proxies.
- 23.1.1. The Lesson of the Internet Worm
- 24.2.1. Catching One in the Act
- 24.2.4.2. How to contact the system administrator of a computer you don't know
- (see also Internet, Worm program)
- disabling
: 17.3.8.2. Disabling finger
- FIPS (Federal Information Processing Standard)
: 6.4.2. Summary of Public Key Systems
- fired employees
: 13.2.6. Departure
- fires
- 12.2.1.1. Fire
- 12.2.1.2. Smoke
- 12.4.1.1. Fire hazards
- extinguishers and radio transmitters
: 12.2.1.8. Electrical noise
- firewalls
- 8.8.9. Account Names Revisited: Using Aliases for Increased Security
- 17.2. Controlling Access to Servers
- 21. Firewalls
- 21.4.2. Electronic Mail
- 21.5. Special Considerations
- checklist for
: A.1.1.20. Chapter 21: Firewalls
- mailing list for
- E.1.3.1. Academic-Firewalls
- E.1.3.7. Firewalls
- nameservers and
: 17.3.6.2. DNS nameserver attacks
- for NIS sites
: 19.4.5. Unintended Disclosure of Site Information with NIS
- portmapper program and
: 19.2.1. Sun's portmap/rpcbind
- for specific network services
: G. Table of IP Services
- FIRST teams
- 24.6. Resuming Operation
- E.3.3. FIRST
- Fitzgerald, Tom
: 22.5. UDP Relayer
- flooding
- client
: 16.3.2. Security and Nameservice
- messages
: 25.3.2. Message Flooding
- servers with requests
: 25.3.1. Service Overloading
- water
: (see water)
- floors, raised
: 12.2.3.1. Raised floors and dropped ceilings
- floppy disks
: (see backups; media)
- folders
: (see directories)
- FollowSymLinks option
: 18.3.2. Commands Within the <Directory> Block
- food
: 12.2.2.1. Food and drink
- fork command
- 23.2. Tips on Avoiding Security-related Bugs
- 25.2.1.1. Too many processes
- C.2. Creating Processes
- format
- file, monitoring
: 8.2. Monitoring File Format
- redoing as destructive attack
: 25.1. Destructive Attacks
- USERFILE entries
: 15.4.1.3. Format of USERFILE entry without system name
- .forward file
- 11.5.2.5. .forward, .procmailrc
- 21.4.2. Electronic Mail
- 24.4.1.6. Changes to startup files
- Frame Ground (FG)
: 14.3. The RS-232 Serial Protocol
- fraud
- 14.4.1. One-Way Phone Lines
- 26.2.2. Federal Jurisdiction
- fscanf function
: 23.2. Tips on Avoiding Security-related Bugs
- fsck program
- 24.4.1.7. Hidden files and directories
- 25.2.2.8. Tree-structure attacks
- fsirand command
: 20.4.8. Use fsirand
- fstab file
- 11.1.2. Back Doors and Trap Doors
- 19.3.2.5. Mounting a secure filesystem
- FTP (File Transfer Protocol)
- 17.3.2. (FTP) File Transfer Protocol (TCP Ports 20 and 21)
- 17.3.2.7. Allowing only FTP access
- anonymous
- 4.1. Users and Groups
- 17.3.2.1. Using anonymous FTP
- 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP server
- anonymous
- and HTTP
: 18.2.4.1. Beware mixing HTTP with anonymous FTP
- ~ftp/bin directory
: 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP server
- ~ftp/etc directory
: 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP server
- ~ftp/pub directory
: 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP server
- logging transferred files
: 10.3.3. xferlog Log File
- passive mode
- 17.3.2.2. Passive vs. active FTP
- 17.3.2.3. FTP passive mode
- setting up server
- 17.3.2.4. Setting up an FTP server
- 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP server
- ftp account
: (see anonymous FTP)
- ftpd server
- 8.4.2. Changing the Account's Login Shell
- 11.1.2. Back Doors and Trap Doors
- 17.3.2. (FTP) File Transfer Protocol (TCP Ports 20 and 21)
- 17.3.2.4. Setting up an FTP server
- for backups
: 7.4.5. Backups Across the Net
- security hole
: 6.5.2. Using Message Digests
- UUCP enabled on
: 15.8. UUCP Over Networks
- ftpout account, firewalls
: 21.4.4.1. Creating an ftpout account to allow FTP without proxies.
- ftpusers file
: 17.3.2.5. Restricting FTP with the standard UNIX FTP server
- ftruncate system call
: 5.1.7. File Permissions in Detail
- full backups
: 7.1.3. Types of Backups
- function keys
: 12.3.4.5. Function keys
- functionality, add-on
: 1.4.3. Add-On Functionality Breeds Problems
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