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Index: F
- F configuration command
- sendmail, 5.3.6. File Class Macros
- sendmail, 12.2. The File Form of Class
- sendmail, 18.8. Alphabetized Reference
- sendmail, 32.1. Class Configuration Commands
- sendmail, 32.1.2. The F Class Command
- sendmail, 33. Database Macros
- file form
: sendmail, 22.4.2. The F Command - File Form
- program form
: sendmail, 22.4.3. The F Command - Program Form
- -f database switch
: sendmail, 33.3.4.3. -f don't fold keys to lowercase (V8.1 and above)
- f flag
- sendmail, 30.7. Pitfalls
- sendmail, 30.8. Alphabetized F= Flags
- F flag
: sendmail, 30.8. Alphabetized F= Flags
- F line (qf file)
- sendmail, 23.3.5. Funny Flag Bits in qf File
- sendmail, 23.9. The qf File Internals
- $f macro
: sendmail, 31.10. Alphabetized Reference
- $F macro
: sendmail, 31.10. Alphabetized Reference
- f option
: (see SaveFromLine (f) option)
- F option
: (see TempFileMode (F) option)
- -f switch (makemap)
: sendmail, 33.2.1.2. -f don't fold uppercase to lowercase
- -f switch (sendmail)
- sendmail, 11.6. Handling user@thishost
- sendmail, 14.6. Trusted User
- sendmail, 22.8.1. Trusted Users
- sendmail, 30.8. Alphabetized F= Flags
- sendmail, 36.7. Alphabetized Reference
- -F switch (sendmail)
: sendmail, 36.7. Alphabetized Reference
- F= equate
- sendmail, 30.4. The Equates
- (see flags, delivery agent)
- facility, mail-handling program
: sendmail, 26.1.1. syslog(3)
- factoring numbers
- Practical UNIX & Internet Security, 6.4.6. RSA and Public Key Cryptography
- Practical UNIX & Internet Security, 6.4.6.3. Strength of RSA
- (see also RSA algorithm)
- fail-safe stance
- Building Internet Firewalls, 3.5. Fail-Safe Stance
- Building Internet Firewalls, 9.1.4.5. Fail-safe stance
- Building Internet Firewalls, 9.2.3.5. Fail-safe stance
- failed login attempts
: (see logging in)
- failures, computer
- Practical UNIX & Internet Security, 7.1.1.1. A taxonomy of computer failures
- Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- (see also bugs)
- fair use laws
: Practical UNIX & Internet Security, 26.4.2. Copyright Infringement
- fallbackhost
: TCP/IP Network Administration, E.4.2. sendmail Options
- FallbackMXhost (V) option
- sendmail, 21.2.3. Look Up Addresses for Delivery
- sendmail, 34.8. Alphabetized Reference
- false authentication
: Building Internet Firewalls, 10.1.3. False Authentication
- FAQ, sendmail
: sendmail, 2.2. Read the Documents
- Fast Filesystem (FFS)
: Practical UNIX & Internet Security, 25.2.2.6. Reserved space
- fast ports
: (see Ethernet)
- FAX (facsimile machine)
- sendmail, 3.3.3. Other Protocols
- sendmail, 31.10. Alphabetized Reference
- FAX-RELAY macro (m4)
: sendmail, 19.6. Alphabetized m4 Macros
- fax-support, built-in
: TCP/IP Network Administration, E.3.5. MAILER
- FAX_RELAY macro (m4)
: sendmail, 31.10. Alphabetized Reference
- FBI (Federal Bureau of Investigation)
- Practical UNIX & Internet Security, 26.2.2. Federal Jurisdiction
- Practical UNIX & Internet Security, F.3.2. FBI (Federal Bureau of Investigation)
- fbtab file
: Practical UNIX & Internet Security, 17.3.21.1. etc/fbtab and /etc/logindevperm
- fcntl command
: sendmail, 23.2.3. The Lock File (obsolete as of V5.62): lf
- FDDI network
: TCP/IP Network Administration, 6.1.5.4. Maximum transmission unit
- backbone
: TCP/IP Network Administration, 11.8. Protocol Case Study
- FEATURE macro
- sendmail, 16.2.3. FEATURE
- sendmail, 19.3.4. FEATURE()
- sendmail, 19.6. Alphabetized m4 Macros
- TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros
- in sendmail
- TCP/IP Network Administration, E.3. m4 sendmail Macros
- TCP/IP Network Administration, E.3.2. FEATURE
- features, listed
: TCP/IP Network Administration, E.3.2. FEATURE
- Federal Information Exchanges (FIXs)
: TCP/IP Network Administration, 1.1. TCP/IP and the Internet
- Federal Information Processing Standard (FIPS)
: Practical UNIX & Internet Security, 6.4.2. Summary of Public Key Systems
- federal law enforcement
- Practical UNIX & Internet Security, 26.2.2. Federal Jurisdiction
- Practical UNIX & Internet Security, 26.2.3. Federal Computer Crime Laws
- _FFR_ macro
: sendmail, 18.8. Alphabetized Reference
- FFS (Fast File System)
: Practical UNIX & Internet Security, 25.2.2.6. Reserved space
- fgetfolded routine
: sendmail, 18.8. Alphabetized Reference
- fgets function
: Practical UNIX & Internet Security, 23.1.1. The Lesson of the Internet Worm
- Fiber Digital Data Interface (FDDI)
- TCP/IP Network Administration, 1.7. Application Layer
- TCP/IP Network Administration, 5.3.1.2. Pseudo-device
- (see also FDDI network)
- fiber optic cables
: (see cables, network)
- file class macros
: sendmail, 5.3.6. File Class Macros
- *file* delivery agent
: sendmail, 30.5.1. The *file* and *include* Agents
- File Handles
: Practical UNIX & Internet Security, 20.1.2. File HandlesFile Handles
- File Service Protocol
- Building Internet Firewalls, 2.2. File Transfer
- Building Internet Firewalls, 8.2.3. File Service Protocol (FSP)
- File Transfer Protocol
: (see FTP (File Transfer Protocol))
- filenames, attacks via
: Practical UNIX & Internet Security, 11.5.1.4. Filename attacks
- files
: Practical UNIX & Internet Security, 5.1. Files
- appending to
- sendmail, 33.2.1.4. -o append to, don't overwrite the file
- (see appending to files)
- automatic directory listings
: Practical UNIX & Internet Security, 18.2.2.2. Additional configuration issues
- backing up
- Practical UNIX & Internet Security, 7. Backups
- Practical UNIX & Internet Security, 7.4.7. inode Modification Times
- automatic system for
- Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
- Practical UNIX & Internet Security, 18.2.3.5. Beware stray CGI scripts
- critical files
- Practical UNIX & Internet Security, 7.3. Backing Up System Files
- Practical UNIX & Internet Security, 7.3.2. Building an Automatic Backup System
- prioritizing
: Practical UNIX & Internet Security, 7.3.1. What Files to Back Up?
- changing owner of
: Practical UNIX & Internet Security, 5.7. chown: Changing a File's Owner
- checking
: TCP/IP Network Administration, 12.4.2.1. Checking files
- configuration
: (see configuration, files)
- context-dependent (CDFs)
- Practical UNIX & Internet Security, 5.9.2. Context-Dependent Files
- Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories
- core
: Practical UNIX & Internet Security, C.4. The kill Command
- delivery to
: sendmail, 30.8. Alphabetized F= Flags
- descriptors
: Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- detecting changes to
- Practical UNIX & Internet Security, 9.2. Detecting Change
- Practical UNIX & Internet Security, 9.3. A Final Note
- device
: Practical UNIX & Internet Security, 5.6. Device Files
- directory for safe writes
: sendmail, 34.8. Alphabetized Reference
- downloading, logs of
- Practical UNIX & Internet Security, 10.3.3. xferlog Log File
- Practical UNIX & Internet Security, 10.3.5. access_log Log File
- F configuration command
: sendmail, 22.4.2. The F Command - File Form
- finding
: TCP/IP Network Administration, 13.3. Finding Files
- finding all SUID/SGID
- Practical UNIX & Internet Security, 5.5.4. Finding All of the SUID and SGID Files
- Practical UNIX & Internet Security, 5.5.4.1. The ncheck command
- format, monitoring
: Practical UNIX & Internet Security, 8.2. Monitoring File Format
- group-writable
: Practical UNIX & Internet Security, 11.6.1.2. Writable system files and directories
- hidden
: Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories
- hidden space
: Practical UNIX & Internet Security, 25.2.2.7. Hidden space
- history
: Practical UNIX & Internet Security, 10.4.1. Shell History
- immutable
: Practical UNIX & Internet Security, 9.1.1. Immutable and Append-Only Files
- integrity of
: (see integrity)
- intruder's changes to
: Practical UNIX & Internet Security, 24.4.1.1. Changes in file contents
- locating largest
: Practical UNIX & Internet Security, 25.2.2.1. Disk-full attacks
- location, sendmail options for
: sendmail, 34.6.1. File Locations
- lock requests, handling
: TCP/IP Network Administration, 9.1.1. NFS Daemons
- locking
: Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- log
: (see logs/logging)
- mail sent directly to
: Practical UNIX & Internet Security, 15.7. Early Security Problems with UUCP
- mailbox
: (see mailbox file)
- of masquerading domains
: sendmail, 19.6. Alphabetized m4 Macros
- modification times of
- Practical UNIX & Internet Security, 5.1.2. Inodes
- Practical UNIX & Internet Security, 5.1.5. File Times
- Practical UNIX & Internet Security, 7.4.7. inode Modification Times
- Practical UNIX & Internet Security, 9.2.2. Checklists and Metadata
- network configuration
: Practical UNIX & Internet Security, 10.4.3. Network Setup
- output, can't write to
: sendmail, 36.5.1. EX_CANTCREAT Can't Write a User's File
- queue
: sendmail, 3.1.2. The Queue Directory
- remote access to
- Practical UNIX & Internet Security, 15.4.1. USERFILE: Providing Remote File Access
- Practical UNIX & Internet Security, 15.4.2.1. Some bad examples
- removing from anonymous FTP area
: Building Internet Firewalls, 8.2.1.6. Be careful of writable
- servers, names of
: TCP/IP Network Administration, 4.5.1. File servers
- SGID bit on
: Practical UNIX & Internet Security, 5.5.7. SGID Bit on Files (System V UNIX Only): Mandatory
- sharing
- TCP/IP Network Administration, 1.7. Application Layer
- TCP/IP Network Administration, 3.7.1. File Sharing
- different from file transfer
: TCP/IP Network Administration, 3.7.1. File Sharing
- in src directory
: sendmail, 2.3. What's What in src
- startup
- Practical UNIX & Internet Security, 11.5.2. Start-up File Attacks
- Practical UNIX & Internet Security, 11.5.2.7. Other initializations
- storing classes in
: sendmail, 12.2. The File Form of Class
- system database
: Practical UNIX & Internet Security, 1.2. What Is an Operating System?
- temporary, permissions for
: sendmail, 34.8. Alphabetized Reference
- transferring
- Building Internet Firewalls, 2.2. File Transfer
- Building Internet Firewalls, 8.2. File Transfer
- Building Internet Firewalls, 8.14. Network File System
- Practical UNIX & Internet Security, 15.1.1. uucp Command
- (see also NFS)
- interactive transfers
: TCP/IP Network Administration, 1.7. Application Layer
- types of
: Practical UNIX & Internet Security, 5.1.6. Understanding File Permissions
- unowned
: Practical UNIX & Internet Security, 24.4.1.8. Unowned files
- uploading by prearrangement
: Building Internet Firewalls, 8.2.1.6. Be careful of writable
- on Web servers
: (see Web servers)
- world-writable
: Practical UNIX & Internet Security, 11.6.1.1. World-writable user files and directories
- zero-filled bytes in
: Practical UNIX & Internet Security, 7.4. Software for Backups
- filesystems
: (see directories)
- backing up
: Building Internet Firewalls, 13.5.1. Backing Up Your Filesystems
- hierarchy
: sendmail, 3.1. Role in the Filesystem
- mounting as read-only
: Building Internet Firewalls, 5.8.4.3. Mount filesystems as read-only
- network
: Building Internet Firewalls, 2.12. Network File Systems
- filter files (mail)
: Practical UNIX & Internet Security, 11.5.2.5. .forward, .procmailrc
- filter programs
- sendmail, 24.4.1. The Postmaster Alias
- sendmail, 24.6.2. Filtering Recipients with a Shell Script
- filtering air
: Practical UNIX & Internet Security, 12.2.1.3. Dust
- filtering packets
: (see packet filtering)
- filtering router
: (see screening routers)
- FIN bit
: TCP/IP Network Administration, 1.6.2. Transmission Control Protocol
- find command
- Practical UNIX & Internet Security, 5.5.4. Finding All of the SUID and SGID Files
- Practical UNIX & Internet Security, 11.5.1.4. Filename attacks
- -H option
: Practical UNIX & Internet Security, 5.9.2. Context-Dependent Files
- -ls option
: Practical UNIX & Internet Security, 9.2.2.1. Simple listing
- -size option
: Practical UNIX & Internet Security, 25.2.2.1. Disk-full attacks
- -H option
: Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories
- -print option
: Practical UNIX & Internet Security, 5.5.4. Finding All of the SUID and SGID Files
- in security checks
: TCP/IP Network Administration, 12.4.2.1. Checking files
- type -f option
: Practical UNIX & Internet Security, 5.5.4. Finding All of the SUID and SGID Files
- -xdev option
: Practical UNIX & Internet Security, 5.5.4. Finding All of the SUID and SGID Files
- finding addresses
: (see rule set 3)
- finger service
- Building Internet Firewalls, 2.7. Information About People
- Building Internet Firewalls, 5.6. Selecting Services Provided by the
- Building Internet Firewalls, 5.8.2.4. Which services should you disable?
- Building Internet Firewalls, 8.8.1. finger
- Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command
- Practical UNIX & Internet Security, 10.1.1. lastlog File
- Practical UNIX & Internet Security, 10.1.2. utmp and wtmp Files
- Practical UNIX & Internet Security, 15.3.1. Assigning Additional UUCP Logins
- Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
- Practical UNIX & Internet Security, 17.3.4.3. Improving the security of Berkeley sendmail V8
- Practical UNIX & Internet Security, 17.3.8. finger (TCP Port 79)
- Practical UNIX & Internet Security, 17.3.8.3. Replacing finger
- Practical UNIX & Internet Security, 21.4.4.1. Creating an ftpout account to allow FTP without proxies.
- Practical UNIX & Internet Security, 23.1.1. The Lesson of the Internet Worm
- Practical UNIX & Internet Security, 24.2.1. Catching One in the Act
- Practical UNIX & Internet Security, 24.2.4.2. How to contact the system administrator of a computer
- (see also Worm program)
- disabling
: Practical UNIX & Internet Security, 17.3.8.2. Disabling finger
- monitoring access to daemon
: TCP/IP Network Administration, 12.5.1. wrapper
- service
: TCP/IP Network Administration, 5.4. The Internet Daemon
- target for intruders
: TCP/IP Network Administration, C.3.1.8. Well-Known Services record
- fingerd server
- Building Internet Firewalls, 5.8.2.4. Which services should you disable?
- sendmail, 22.3.2. SMTP vrfy and expn
- fingerprint authentication
: Building Internet Firewalls, 10.2.1. Something You Are
- finite state machine (FSM)
- diagrams or tables
: TCP/IP Network Administration, B.4. Trace Statements
- transitions, tracing
: TCP/IP Network Administration, B.8.10. The routerdiscovery Statement
- FIPS (Federal Information Processing Standard)
: Practical UNIX & Internet Security, 6.4.2. Summary of Public Key Systems
- fired employees
: Practical UNIX & Internet Security, 13.2.6. Departure
- fires
- Practical UNIX & Internet Security, 12.2.1.1. Fire
- Practical UNIX & Internet Security, 12.2.1.2. Smoke
- Practical UNIX & Internet Security, 12.4.1.1. Fire hazards
- TCP/IP Network Administration, 12.1.1. Assessing the Threat
- extinguishers and radio transmitters
: Practical UNIX & Internet Security, 12.2.1.8. Electrical noise
- firewalls
- Building Internet Firewalls, 1.4. What Is an Internet Firewall?
- Practical UNIX & Internet Security, 8.8.9. Account Names Revisited: Using Aliases for Increased
- Practical UNIX & Internet Security, 17.2. Controlling Access to Servers
- Practical UNIX & Internet Security, 21. Firewalls
- Practical UNIX & Internet Security, 21.4.2. Electronic Mail
- Practical UNIX & Internet Security, 21.5. Special Considerations
- TCP/IP Network Administration, 9.3.2. NIS+
- TCP/IP Network Administration, 12.7. Firewalls
- (see also security)
- accepting only internal mail
: sendmail, 20.2.1. Accept Mail Only From Our Domain
- architecture of
: Building Internet Firewalls, 4.2. Firewall Architectures
- backing up
: Building Internet Firewalls, 12.1.1. Backing Up Your Firewall
- blocking troubleshooting measures
: TCP/IP Network Administration, 11.1.1. Troubleshooting Hints
- buying versus building
: Building Internet Firewalls, 1.4.3. Buying Versus Building
- checklist for
: Practical UNIX & Internet Security, A.1.1.20. Chapter 21: Firewalls
- configuring NTP with
: Building Internet Firewalls, 8.13.3. Configuring NTP to
- configuring SMTP with
: Building Internet Firewalls, 8.1.1.6. Configuring SMTP to
- defined
: TCP/IP Network Administration, 12.7. Firewalls
- definition of
: Building Internet Firewalls, 1.4. What Is an Internet Firewall?
- designing
: Building Internet Firewalls, 4. Firewall Design
- disadvantage of
: TCP/IP Network Administration, 12.7.1. Functions of the firewall
- dual-homed host as
: Building Internet Firewalls, 5.8.2.5. Turning off routing
- FAQ for
: Building Internet Firewalls, A.7. Papers
- functions of
: TCP/IP Network Administration, 12.7.1. Functions of the firewall
- headers and
: sendmail, 20.2.5. Prune Received: Headers at Firewall
- internal
: Building Internet Firewalls, 4.4. Internal Firewalls
- bastion hosts on
: Building Internet Firewalls, 4.4.6. An Internal Firewall May or May Not
- IP multicasting and
: Building Internet Firewalls, 8.9.3. The Multicast Backbone (MBONE)
- IPv6 and
: Building Internet Firewalls, 6.3.6. IP Version 6
- on joint networks
: Building Internet Firewalls, 4.4.4. Joint Venture Firewalls
- keeping current
: Building Internet Firewalls, 12.3. Keeping Up to Date
- layering
: Building Internet Firewalls, 3.2. Defense in Depth
- limiting connectivity
: TCP/IP Network Administration, 10.7.1. Modifying Local Information
- mailing list for
- Practical UNIX & Internet Security, E.1.3.1. Academic-Firewalls
- Practical UNIX & Internet Security, E.1.3.7. Firewalls
- mailing lists
: Building Internet Firewalls, A.3.1. Firewalls
- maintaining
: Building Internet Firewalls, 12. Maintaining Firewalls
- multiple bastion hosts
: Building Internet Firewalls, 4.3.1. It's OK to Use
- nameservers and
: Practical UNIX & Internet Security, 17.3.6.2. DNS nameserver attacks
- need for professional installation
: TCP/IP Network Administration, 12.7.1. Functions of the firewall
- for NIS sites
: Practical UNIX & Internet Security, 19.4.5. Unintended Disclosure of Site Information with NIS
- portmapper program and
: Practical UNIX & Internet Security, 19.2.1. Sun's portmap/rpcbind
- recreating entirely
: Building Internet Firewalls, 12.5. When Should You Start Over?
- resources for
: Building Internet Firewalls, A. Resources
- responding to probes of
: Building Internet Firewalls, 12.2.4. Responding to Probes
- responding to security incidents
: Building Internet Firewalls, 13. Responding to Security Incidents
- routing control within
- TCP/IP Network Administration, 12.7.2. Routing control
- TCP/IP Network Administration, E.4.2. sendmail Options
- RunAsUser option
: sendmail, 34.8. Alphabetized Reference
- samples of
: Building Internet Firewalls, 9. Two Sample Firewalls
- security policies for
: Building Internet Firewalls, 11. Security Policies
- setting up NNTP in
: Building Internet Firewalls, 8.5.3. Dangerous Ways to Set up
- for specific network services
: Practical UNIX & Internet Security, G. Table of IP Services
- testing
: Building Internet Firewalls, 6.8.7. It Should Be Able to Log Accepted and
- tools for
: Building Internet Firewalls, B. Tools
- using BSD system as
: TCP/IP Network Administration, 5.3.1.1. Options
- using Linux system as
: TCP/IP Network Administration, 5.2. Linux Kernel Configuration
- utilities for
: Building Internet Firewalls, B.6. Utilities
- weakest link and
: Building Internet Firewalls, 3.4. Weakest Link
- what to protect
: Building Internet Firewalls, 1.1. What Are You Trying to
- X11 window system and
: Building Internet Firewalls, 8.16. X11 Window System
- FIRST mailing list
: TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information
- FIRST response teams
- Building Internet Firewalls, A.5.2. FIRST
- Practical UNIX & Internet Security, 24.6. Resuming Operation
- Practical UNIX & Internet Security, E.3.3. FIRST
- first-class precedence
: sendmail, 14.4. Precedence
- Fitzgerald, Tom
: Practical UNIX & Internet Security, 22.5. UDP Relayer
- Flags field
: TCP/IP Network Administration, 1.5.1.3. Fragmenting datagrams
- flags, delivery agent
- sendmail, 6.3. The local Delivery Agent
- sendmail, 6.4. Add the Missing Parts to Mhub
- sendmail, 14.2. Headers Versus Delivery Agent Flags
- sendmail, 14.2.3. The Message-ID: Header
- sendmail, 30.4. The Equates
- sendmail, 30.8. Alphabetized F= Flags
- sendmail, 35.4. ?flags? in Header Definitions
- (see also under specific flag)
- flags, qf file
: sendmail, 23.9. The qf File Internals
- flags, routine table
- TCP/IP Network Administration, 2.5. The Routing Table
- TCP/IP Network Administration, 7.2. The Minimal Routing Table
- defining interface characteristics
: TCP/IP Network Administration, 6.1.2. Checking the Interface with ifconfig
- flock command
: sendmail, 23.2.3. The Lock File (obsolete as of V5.62): lf
- flooding
- Building Internet Firewalls, 1.2.1.2. Denial of Service
- TCP/IP Network Administration, 7.4.3. Open Shortest Path First
- TCP/IP Network Administration, B.8.1. The ospf Statement
- client
: Practical UNIX & Internet Security, 16.3.2. Security and Nameservice
- messages
: Practical UNIX & Internet Security, 25.3.2. Message Flooding
- servers with requests
: Practical UNIX & Internet Security, 25.3.1. Service Overloading
- water
: (see water)
- floors, raised
: Practical UNIX & Internet Security, 12.2.3.1. Raised floors and dropped ceilings
- floppy disks
: (see backups; media)
- flow control
- Building Internet Firewalls, C.6.2. Transmission Control Protocol
- TCP/IP Network Administration, 1.5.2. Internet Control Message Protocol
- TCP/IP Network Administration, 1.6.2. Transmission Control Protocol
- flows, IPv6
: Building Internet Firewalls, 6.3.6. IP Version 6
- focused address
: sendmail, 17.1.1.3. Handle null address
- folders
: (see directories)
- FollowSymLinks option
: Practical UNIX & Internet Security, 18.3.2. Commands Within the <Directory>
- font, Japanese conversion
: sendmail, 36.7. Alphabetized Reference
- foo.org database
: TCP/IP Network Administration, 12.4.3.2. SATAN
- food
: Practical UNIX & Internet Security, 12.2.2.1. Food and drink
- forged mail messages
- sendmail, 13.2.1. The Location of the Queue Directory
- sendmail, 22.7. Forged Mail
- forged packets
: Building Internet Firewalls, 6.3.7. Non-IP Protocols
- forgery
: (see also security)
- man-in-the-middle
: Building Internet Firewalls, 6.6.1. Risks of Filtering by Source
- source address
: Building Internet Firewalls, 6.6.1. Risks of Filtering by Source
- fork command
- Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- Practical UNIX & Internet Security, 25.2.1.1. Too many processes
- Practical UNIX & Internet Security, C.2. Creating Processes
- sendmail, 30.6.1. Fork
- sendmail, 34.8. Alphabetized Reference
- FORK macro
: sendmail, 18.8. Alphabetized Reference
- ForkEachJob (Y) option
: sendmail, 34.8. Alphabetized Reference
- format
- address
- sendmail, 6.3. The local Delivery Agent
- sendmail, 31.10. Alphabetized Reference
- file, monitoring
: Practical UNIX & Internet Security, 8.2. Monitoring File Format
- redoing as destructive attack
: Practical UNIX & Internet Security, 25.1. Destructive Attacks
- USERFILE entries
: Practical UNIX & Internet Security, 15.4.1.3. Format of USERFILE entry without system name
- Forum of Incident Response and Security Teams (FIRST)
: TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information
- .forward file
- Practical UNIX & Internet Security, 11.5.2.5. .forward, .procmailrc
- Practical UNIX & Internet Security, 21.4.2. Electronic Mail
- Practical UNIX & Internet Security, 24.4.1.6. Changes to startup files
- sendmail, 18.8. Alphabetized Reference
- sendmail, 22.5.3. Permissions for ~/.forward Files
- sendmail, 23.9. The qf File Internals
- sendmail, 25.7. The User's ~/.forward File
- sendmail, 34.8. Alphabetized Reference
- TCP/IP Network Administration, 10.3.1. Personal mail forwarding
- chain of
: sendmail, 25.7.1. Unscrambling Forwards
- ForwardPath (J) option
- sendmail, 22.8.3.2. The ForwardPath option
- sendmail, 34.8. Alphabetized Reference
- smrsh program
: sendmail, 22.8.2. The smrsh Program
- forwarders
- sendmail, 8.1.1. The dc.gov Domain
- TCP/IP Network Administration, 8.3.1.1. Configuring a caching-only nameserver
- TCP/IP Network Administration, C.2. named.boot Configuration Commands
- forwarding
- sendmail, 29.6.6. Forwarding over the Network
- TCP/IP Network Administration, 1.5.1.4. Passing datagrams to the transport layer
- loops
: sendmail, 25.7.2. Forwarding Loops
- with Resent- headers
: sendmail, 35.7. Forwarding with Resent-Headers
- ForwardPath (J) option
- sendmail, 22.8.3.2. The ForwardPath option
- sendmail, 34.8. Alphabetized Reference
- FQDNs (fully qualified domain names)
- sendmail, 4.2. Verbose (-v)
- sendmail, 7.3.1. The hostname
- sendmail, 8.1. A Fictional Network
- sendmail, 21.1. Overview
- TCP/IP Network Administration, 3.3.3. Domain Names
- (see also $j macro)
- trailing dot for
- sendmail, 15.3. MX Records
- sendmail, 17.4. Rule Set 4
- sendmail, 29.5.1. Stripping Trailing Dots
- fragmentation
- Building Internet Firewalls, 6.3.1.2. IP layer
- Building Internet Firewalls, 6.3.2.2. IP fragmentation
- Building Internet Firewalls, C.5.1.3. Fragmenting datagrams
- TCP/IP Network Administration, 1.5.1.3. Fragmenting datagrams
- avoiding
: TCP/IP Network Administration, 6.1.5.4. Maximum transmission unit
- datagrams
: (see datagrams)
- Fragmentation Offset field
: TCP/IP Network Administration, 1.5.1.3. Fragmenting datagrams
- Frame Ground (FG)
: Practical UNIX & Internet Security, 14.3. The RS-232 Serial Protocol
- frames
: TCP/IP Network Administration, 1.3. TCP/IP Protocol Architecture
- fraud
- Practical UNIX & Internet Security, 14.4.1. One-Way Phone Lines
- Practical UNIX & Internet Security, 26.2.2. Federal Jurisdiction
- FreeBSD systems
- TCP/IP Network Administration, 5.3. The BSD Kernel Configuration File
- TCP/IP Network Administration, 5.3.1.1. Options
- freezing sendmail.cf configuration file
: sendmail, 36.7. Alphabetized Reference
- "From:" header line
- sendmail, 1.5. The Header
- sendmail, 5.3.10. Trusted Users
- sendmail, 14.1.1. The From: Header
- sendmail, 18.8. Alphabetized Reference
- sendmail, 30.7. Pitfalls
- sendmail, 30.8. Alphabetized F= Flags
- sendmail, 31.10. Alphabetized Reference
- sendmail, 34.8. Alphabetized Reference
- sendmail, 35.7.1. Remove and Recreate the From: Header
- sendmail, 35.10. Alphabetized Reference
- (see also $l macro)
- (see also trusted users)
- from= equate (syslog output)
: sendmail, 26.1.3.3. from= show envelope sender
- fscanf function
: Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- fsck program
- Practical UNIX & Internet Security, 24.4.1.7. Hidden files and directories
- Practical UNIX & Internet Security, 25.2.2.8. Tree-structure attacks
- fsirand command
: Practical UNIX & Internet Security, 20.4.8. Use fsirand
- FSP (File Service Protocol)
- Building Internet Firewalls, 2.2. File Transfer
- Building Internet Firewalls, 8.2.3. File Service Protocol (FSP)
- fstab file
- Practical UNIX & Internet Security, 11.1.2. Back Doors and Trap Doors
- Practical UNIX & Internet Security, 19.3.2.5. Mounting a secure filesystem
- TCP/IP Network Administration, 9.1.3.2. The vfstab and fstab files
- FTP (File Transfer Protocol)
- Building Internet Firewalls, 2.2. File Transfer
- Building Internet Firewalls, 5.8.2.4. Which services should you disable?
- Building Internet Firewalls, 8.2.2. Trivial File Transfer Protocol
- Practical UNIX & Internet Security, 17.3.2. (FTP) File Transfer Protocol (TCP Ports 20 and 21)
- Practical UNIX & Internet Security, 17.3.2.7. Allowing only FTP access
- TCP/IP Network Administration, 1.7. Application Layer
- TCP/IP Network Administration, 9.6. Managing Distributed Servers
- (see also TFTP)
- anonymous
- Practical UNIX & Internet Security, 4.1. Users and Groups
- Practical UNIX & Internet Security, 17.3.2.1. Using anonymous FTP
- Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP
- TCP/IP Network Administration, 13.2. Anonymous FTP
- anonymous
- and HTTP
: Practical UNIX & Internet Security, 18.2.4.1. Beware mixing HTTP with anonymous FTP
- Archie
: Building Internet Firewalls, 2.6. Other Information Services
- configuring
: 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
- ~ftp/bin directory
: Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP
- ~ftp/etc directory
: Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP
- ~ftp/pub directory
: Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP
- logging transferred files
: Practical UNIX & Internet Security, 10.3.3. xferlog Log File
- obtaining BIND via
: sendmail, 21.1.1. Which DNS? 4.8.3 or 4.9?
- obtaining source code via
- sendmail, 2.1. Get the Source
- sendmail, 18.3. Obtain the Source
- passive (or PASV) mode
: Building Internet Firewalls, 8.2.1.1. Packet filtering characteristics of
- passive mode
- Practical UNIX & Internet Security, 17.3.2.2. Passive vs. active FTP
- Practical UNIX & Internet Security, 17.3.2.3. FTP passive mode
- problem for firewalls
: TCP/IP Network Administration, 12.7.1. Functions of the firewall
- proxying with TIS FWTK
: Building Internet Firewalls, 7.7.1. FTP Proxying with
- resources for
: Building Internet Firewalls, A.2. FTP Sites
- server, creating
: TCP/IP Network Administration, 13.2.1. Creating an FTP Server
- setting up server
- Practical UNIX & Internet Security, 17.3.2.4. Setting up an FTP server
- Practical UNIX & Internet Security, 17.3.2.6. Setting up anonymous FTP with the standard UNIX FTP
- via proxy server
: Building Internet Firewalls, 7.2.2. Using Custom User Procedures for
- write-only incoming directory
: Building Internet Firewalls, 8.2.1.6. Be careful of writable
- wuarchive daemon
: Building Internet Firewalls, B.5.1. wuarchive ftpd
- wuarchive server
: Building Internet Firewalls, 8.2.1.4. Using the wuarchive
- ftp account
: (see anonymous FTP)
- ftp-gw proxy server
: Building Internet Firewalls, 9.1.1.2. FTP
- ftp.bunyip.com
: TCP/IP Network Administration, 13.3.1.1. archie client software
- ftp.isc.org
: TCP/IP Network Administration, 8.3.4. The named.local File
- ftp://rs.internic.net/netinfo/networks.txt
: TCP/IP Network Administration, 3.2. The Host Table
- ftpd server
- Building Internet Firewalls, 5.8.2.4. Which services should you disable?
- Practical UNIX & Internet Security, 8.4.2. Changing the Account's Login
- Practical UNIX & Internet Security, 11.1.2. Back Doors and Trap Doors
- Practical UNIX & Internet Security, 17.3.2. (FTP) File Transfer Protocol (TCP Ports 20 and 21)
- Practical UNIX & Internet Security, 17.3.2.4. Setting up an FTP server
- for backups
: Practical UNIX & Internet Security, 7.4.5. Backups Across the Net
- security hole
: Practical UNIX & Internet Security, 6.5.2. Using Message Digests
- UUCP enabled on
: Practical UNIX & Internet Security, 15.8. UUCP Over Networks
- ftpout account, firewalls
: Practical UNIX & Internet Security, 21.4.4.1. Creating an ftpout account to allow FTP without proxies.
- ftpusers file
: Practical UNIX & Internet Security, 17.3.2.5. Restricting FTP with the standard UNIX FTP server
- ftruncate system call
: Practical UNIX & Internet Security, 5.1.7. File Permissions in Detail
- full backups
: Practical UNIX & Internet Security, 7.1.3. Types of Backups
- full duplex
: TCP/IP Network Administration, 6.3.5. PPP Server Configuration
- full name, sender
: sendmail, 36.7. Alphabetized Reference
- full zone transfers
: TCP/IP Network Administration, 3.3.4. BIND, resolver, and named
- "Full-Name:" header line
- sendmail, 14.2.1. The Full-Name: Header
- sendmail, 30.8. Alphabetized F= Flags
- sendmail, 35.10. Alphabetized Reference
- fully qualified domain names
: (see FQDNs)
- function keys
: Practical UNIX & Internet Security, 12.3.4.5. Function keys
- functionality, add-on
: Practical UNIX & Internet Security, 1.4.3. Add-On Functionality Breeds Problems
- functions, SOCKS vs. network
: Building Internet Firewalls, 7.6. Using SOCKS for
- future of sendmail
: sendmail, The Future
- fuzzy name matching
: sendmail, 18.8. Alphabetized Reference
- FWALL-Users mailing list
: Building Internet Firewalls, A.3.2. FWALL-Users
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