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# Index: V

V configuration command
  sendmail, 5.2.1. Version
  sendmail, 27.5. The V Configuration Command
  sendmail, D. Sun Enhancements
-v database switch : sendmail, 33.3.4.11. -v specify the value's column (V8.7 and above)
V line (host status file) : sendmail, B.1. Status file lines
V line (qf file) : sendmail, 23.9. The qf File Internals
$v macro : sendmail, 31.10. Alphabetized Reference
$V macro : sendmail, 31.10. Alphabetized Reference
v option : (see Verbose (v) option)
V option : (see FallbackMXhost (V) option)
-v switch (makemap) : sendmail, 33.2.1.6. -v watch keys and data being added
-v switch (sendmail)
  sendmail, 4.2. Verbose (-v)
  sendmail, 23.4.1. Printing the Queue in Verbose Mode
  sendmail, 23.6.2.2. Combine -v with -q
  sendmail, 36.7. Alphabetized Reference
-V switch (sendmail) : sendmail, 36.7. Alphabetized Reference
V.35 : TCP/IP Network Administration, 1.2. A Data Communications Model
V8 sendmail : sendmail, 29.3.1. V8 Enhancements
  comments and : sendmail, 27.3. V8 Comments
  killing and restarting daemon : sendmail, 4.1.1.1. Kill and restart, beginning with V8.7
  m4 preprocessor : sendmail, 19. V8 m4 Configuration
  obtaining source code : sendmail, 2.1. Get the Source
  Sun Microsystem V8.8 enhancements : sendmail, D. Sun Enhancements
vacation program : sendmail, 25.5.5. Precedence: bulk
vacuums, computer : Practical UNIX & Internet Security, 12.2.1.3. Dust
VALIDATE= command : Practical UNIX & Internet Security, 15.5.2. Permissions Commands
validating firewalls : Building Internet Firewalls, 6.8.7. It Should Be Able to Log Accepted and
vampire taps : Practical UNIX & Internet Security, 12.3.1.5. Fiber optic cable
Van Jacobson header compression
  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
vandalism
  Building Internet Firewalls, 1.2.2.2. Vandals
  Practical UNIX & Internet Security, 7.1.1.1. A taxonomy of computer failures
  Practical UNIX & Internet Security, 12.2.4. Vandalism
  Practical UNIX & Internet Security, 12.2.4.3. Network connectors
/var directory
  Practical UNIX & Internet Security, 4.3.7. The Bad su Log
  Practical UNIX & Internet Security, 9.1.2. Read-only Filesystems
  (see also /usr directory)
  /var/adm directory : Practical UNIX & Internet Security, 11.5.3.6. Other files
    /var/adm/acct : Practical UNIX & Internet Security, 10.2. The acct/pacct Process Accounting File
    /var/adm/lastlog file : Practical UNIX & Internet Security, 10.1.1. lastlog File
    /var/adm/loginlog file : Practical UNIX & Internet Security, 10.1.4. loginlog File
    /var/adm/messages
      Practical UNIX & Internet Security, 10.2.3. messages Log File
      Practical UNIX & Internet Security, 4.3.7. The Bad su Log
    /var/adm/savacct : Practical UNIX & Internet Security, 10.2. The acct/pacct Process Accounting File
    /var/adm/sulog file : Practical UNIX & Internet Security, 4.3.7. The Bad su Log
    /var/adm/wtmp file
      Practical UNIX & Internet Security, 10.1.2. utmp and wtmp Files
      Practical UNIX & Internet Security, 10.1.3.1. Pruning the wtmp file
    /var/adm/xferlog : Practical UNIX & Internet Security, 10.3.3. xferlog Log File
  /var/log directory : Practical UNIX & Internet Security, 11.5.3.6. Other files
  /var/run/dhcpd.pid file : TCP/IP Network Administration, D.2. The dhcpd Command
  /var/spool/mqueue temporary files : TCP/IP Network Administration, 10.5.4. The Set Option Command
  /var/spool/uucp/.Admin directory : Practical UNIX & Internet Security, 10.3.4. uucp Log Files
  /var/yp/Makefile file : sendmail, 7.3.1. The hostname
variable-length subnet masks (VLSMs) : TCP/IP Network Administration, 4.2.2. Defining the Subnet Mask
variables
  bounds checking : Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
  to CGI scripts : Practical UNIX & Internet Security, 18.2.3.1. Do not trust the user's browser!
  environment
    sendmail, 5.3.12. Environment variables
    sendmail, 22.2. The Environment
  global : sendmail, 20.1.2. Global Variables
Vendor Extensions field, in BOOTP : TCP/IP Network Administration, 3.6.1. Dynamic Host Configuration Protocol
vendors : Practical UNIX & Internet Security, 27.3.3. Your Vendor?
  liability of : Practical UNIX & Internet Security, 18.5.2. Trusting Your Software Vendor
  sendmail versions
    sendmail, 18.2. Vendor Versus Compiling
    sendmail, 27.5.1. The vendor
    (see also versions)
  vendor-neutral language : TCP/IP Network Administration, 11.9. Simple Network Management Protocol
  vendor-specific syntax : TCP/IP Network Administration, 10.5.1. The Version Level Command
ventilation
  Practical UNIX & Internet Security, 12.2.1.10. Vibration
  (see also dust; smoke and smoking)
  air ducts : Practical UNIX & Internet Security, 12.2.3.2. Entrance through air ducts
  holes (in hardware) : Practical UNIX & Internet Security, 12.2.4.1. Ventilation holes
VERB command (ESMTP) : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
VERB command (sendmail) : Practical UNIX & Internet Security, 17.3.4.3. Improving the security of Berkeley sendmail V8
VERB command (SMTP) : sendmail, 30.8. Alphabetized F= Flags
Verbose (v) option
  sendmail, 34.1.3. Appropriateness of Options
  sendmail, 34.8. Alphabetized Reference
verbose mode
  sendmail, 4.2. Verbose (-v)
  sendmail, 23.4.1. Printing the Queue in Verbose Mode
  sendmail, 23.6.2.2. Combine -v with -q
  sendmail, 34.8. Alphabetized Reference
  sendmail, 36.7. Alphabetized Reference
  TCP/IP Network Administration, 6.4.4. Troubleshooting Serial Connections
  TCP/IP Network Administration, A.1. Dial-Up IP
  TCP/IP Network Administration, A.3. chat
verify mode
  sendmail, 4.1.4. Verify Mode (-bv)
  sendmail, 36.7. Alphabetized Reference
verifying : (see testing)
Verisign Inc. : Practical UNIX & Internet Security, 18.6. Dependence on Third Parties
versions
  sendmail, 5.2.1. Version
  (see also V configuration command)
  BIND : sendmail, 21.1.1. Which DNS? 4.8.3 or 4.9?
  host status file : sendmail, B.1. Status file lines
  m4
    sendmail, 19.2. Build with m4
    sendmail, 31.10. Alphabetized Reference
  mc files : sendmail, 19.6. Alphabetized m4 Macros
  qf file : sendmail, 23.9. The qf File Internals
  sendmail
    sendmail, UNIX and sendmail Versions
    sendmail, 5.2.1. Version
    sendmail, 18.2. Vendor Versus Compiling
    sendmail, 27.5. The V Configuration Command
    sendmail, 31.10. Alphabetized Reference
    sendmail, D.2. Backward Compatibility
  UUCP
    Practical UNIX & Internet Security, 15.2. Versions of UUCP
    Practical UNIX & Internet Security, 15.4. Security in Version 2 UUCP
    Practical UNIX & Internet Security, 15.4.3. L.cmds: Providing Remote Command Execution
    callback feature : Practical UNIX & Internet Security, 15.4.1.5. Requiring callback
  V configuration command : sendmail, D. Sun Enhancements
VERSIONID macro
  sendmail, 19.6. Alphabetized m4 Macros
  TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros
vertical bar (|)
  ! flag : sendmail, 30.8. Alphabetized F= Flags
  | prefix
    sendmail, 22.4.3. The F Command - Program Form
    sendmail, 24.2.3. Delivery via Programs
  in addresses : (see programs, delivering to)
Veteran's Health Administration : Practical UNIX & Internet Security, F.3.4.45. U.S. Veteran's Health Administration
vi editor
  Practical UNIX & Internet Security, 5.5.3.2. Another SUID example: IFS and the /usr/lib/preserve
  Practical UNIX & Internet Security, 11.5.2.4. .exrc
  Practical UNIX & Internet Security, 11.5.2.7. Other initializations
"Via:" header line : sendmail, 35.10. Alphabetized Reference
vibration : Practical UNIX & Internet Security, 12.2.1.10. Vibration
victim hosts : Building Internet Firewalls, 5.6. Selecting Services Provided by the
victim machines : Building Internet Firewalls, 5.2.2. Victim Machines
video content type : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
video tape : Practical UNIX & Internet Security, 7.1.4. Guarding Against Media Failure
view command
  TCP/IP Network Administration, 8.4. Using nslookup
  TCP/IP Network Administration, 11.6. Checking Name Service
vipw command : Practical UNIX & Internet Security, 8.4.1. Changing an Account's Password
virtual links : TCP/IP Network Administration, B.8.1. The ospf Statement
virtual terminal devices : TCP/IP Network Administration, 5.3.1.2. Pseudo-device
virtual terminals : (see Telnet service)
virtusertable feature : sendmail, 19.6. Alphabetized m4 Macros
Virual Private Networks (VPNs) : Practical UNIX & Internet Security, 21.1.2. Uses of Firewalls
VIRUS-L list : TCP/IP Network Administration, 12.1.2.2. Use mailing lists to distribute information
viruses
  Building Internet Firewalls, 1.4.2.4. A firewall can't protect against
  Practical UNIX & Internet Security, 11.1. Programmed Threats: Definitions
  Practical UNIX & Internet Security, 11.1.5. Viruses
  Practical UNIX & Internet Security, 27.2.2. Viruses on the Distribution Disk
voice authentication : Building Internet Firewalls, 10.2.1. Something You Are
voice-message multipart subtype : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
voltage levels : TCP/IP Network Administration, 1.2. A Data Communications Model
voltage spikes : Practical UNIX & Internet Security, 12.2.1.8. Electrical noise
VPNs (virtual private networks) : Practical UNIX & Internet Security, 21.1.2. Uses of Firewalls
VRFY command (SMTP)
  Practical UNIX & Internet Security, 17.3.4.3. Improving the security of Berkeley sendmail V8
  sendmail, 22.3.2. SMTP vrfy and expn
  sendmail, 22.8.3.5. The PrivacyOptions option
  sendmail, 30.8. Alphabetized F= Flags
  TCP/IP Network Administration, 3.4.1. Simple Mail Transfer Protocol
vsprintf function : Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
VT100 terminal : Practical UNIX & Internet Security, 27.2.1. Hardware Bugs

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