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Index: Symbols and Numbers

• flag : sendmail, 30.8. Alphabetized F= Flags
• BaseT networks
• • Practical UNIX & Internet Security, 12.3.1.2. Eavesdropping by Ethernet and 10Base-T
  • Practical UNIX & Internet Security, 16.1. Networking
• -144bsd option : sendmail, 18.5.2. Remove -l44bsd
• flag : sendmail, 30.8. Alphabetized F= Flags
• flag : sendmail, 30.8. Alphabetized F= Flags
• -bit serial lines, running over : TCP/IP Network Administration, 5.2. Linux Kernel Configuration
• flag : sendmail, 30.8. Alphabetized F= Flags
• (SevenBitInput) option : sendmail, 34.8. Alphabetized Reference
• -bit encoding
• • sendmail, 18.8. Alphabetized Reference
  • sendmail, 34.8. Alphabetized Reference
• bit encoding type : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
• flag : sendmail, 30.8. Alphabetized F= Flags
• (EightBitMode) option
• • sendmail, 30.8. Alphabetized F= Flags
  • sendmail, 34.8. Alphabetized Reference
• -bit encoding
• • sendmail, 18.8. Alphabetized Reference
  • sendmail, 30.8. Alphabetized F= Flags
  • sendmail, 34.8. Alphabetized Reference
• bit encoding type : TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
• mm video tape : Practical UNIX & Internet Security, 7.1.4. Guarding Against Media Failure
• flag : sendmail, 30.8. Alphabetized F= Flags
• < > (angle brackets)
• • sendmail, 10.1. Why Preprocess?
  • sendmail, 17.1.1.1. At least one <> pair
  • > option : sendmail, D.5. The > Option
  • >>> as leading characters : sendmail, 4.2. Verbose (-v)
  • nested
  • • sendmail, 10.4. Nested Angle Brackets
    • sendmail, 17.1.1.2. Strip to left of <
  • null address : (see addresses, null)
• '' (apostrophes) (expect nothing) : TCP/IP Network Administration, 6.3.3. chat
• * (asterisk)
• • in mail queue listing
  • • sendmail, 4.1.2. Show Queue Mode (-bp)
    • sendmail, 23.4. Printing the Queue
  • meaning interface not enabled : TCP/IP Network Administration, 6.1.1. Determining the Interface Name
  • in name field, indicating wildcard character : TCP/IP Network Administration, C.3.1. Standard Resource Records
• @ (at sign)
• • in addresses
  • • sendmail, 17.1.1.3. Handle null address
    • sendmail, 29.4.5. Focusing for @ Syntax
  • chacl command with : Practical UNIX & Internet Security, 5.2.5.2. HP-UX access control lists
  • for current origin : TCP/IP Network Administration, C.3.1. Standard Resource Records
  • excluding an individual parameter : TCP/IP Network Administration, 9.4. A BOOTP Server
  • referencing current domain : TCP/IP Network Administration, 8.3.5. The Reverse Domain File
  • in xhost list : Practical UNIX & Internet Security, 17.3.21.3. The xhost facility
• @ flag : sendmail, 30.8. Alphabetized F= Flags
• (backslash)
• • escaping newline characters
  • • TCP/IP Network Administration, 9.2.1. The printcap File
    • TCP/IP Network Administration, A.3. chat
    • TCP/IP Network Administration, C.3.1. Standard Resource Records
  • in header fields : sendmail, 35.3.2. Escape Character in the Header Field
  • mail command and : Practical UNIX & Internet Security, 15.1.3. mail Command
  • in rules : sendmail, 28.1.2.1. Backslashes in rules
  • in UUCP addresses
  • • sendmail, 17.1.4. UUCP Addresses
    • sendmail, 19.6. Alphabetized m4 Macros
• ! (bang) and mail command : Practical UNIX & Internet Security, 15.1.3. mail Command
• (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
• flag : sendmail, 30.8. Alphabetized F= Flags
• {} (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
• $ (dollar sign)
• • $ line (qf file) : sendmail, 23.9. The qf File Internals
  • $ rule-testing command : sendmail, 38.3.1. Dump a Defined Macro with $
  • in macro names : sendmail, 31.5. Macro Expansion: $ and $&
  • wildcard operators
  • • sendmail, 8.7. Wildcard Operators
    • (see also wildcard operators)
  • $1, $2, ... : (see positional operators)
  • $&
  • • sendmail, 28.6.4. Rewrite Through Another Rule Set: $>set
    • sendmail, 31.5.3. Use Value as Is with $&
  • $> : sendmail, 28.6.4. Rewrite Through Another Rule Set: $>set
  • $* : sendmail, 10.2.1. The LHS
  • $@
  • • sendmail, 9.2.2. The Host ($@)
    • sendmail, 9.3. Testing Rule Set 0
    • sendmail, 11.4.1. Rewrite the Lone Username
    • sendmail, 17.1.1.3. Handle null address
    • sendmail, 28.6.3. Rewrite-and-Return Prefix: $@
    • sendmail, 30.5.2.1. The $@ dsn part
    • sendmail, 33.4.2. Specify Numbered Substitution with $@
  • $[ 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
  • $:
  • • sendmail, 9.2.3. The User ($:)
    • sendmail, 9.3. Testing Rule Set 0
    • sendmail, 28.6.2. Rewrite Once Prefix: $:
    • sendmail, 29.6.1. Further Processing: $:user
    • sendmail, 30.5.3. The $: Part
    • sendmail, 33.4.1. Specify a Default with $:
    • sendmail, 33.4. Use Maps with $( and $) in Rules
  • $.
  • • sendmail, 14.1.3. Testing So Far
    • sendmail, 31.6. Macro Conditionals: $?, $|, and $.
  • $=
  • • sendmail, 12.1. The Class Command
    • sendmail, 32.2.1. Matching Any in a Class: $=
    • sendmail, 38.3.2. Dump a Class Macro with $=
  • $#
  • • sendmail, 9.2.1. The Delivery Agent ($#)
    • sendmail, 28.6.5. Specify a Delivery Agent: $#
  • $- : sendmail, 11.4.1. Rewrite the Lone Username
  • $( and $) : sendmail, 33.4. Use Maps with $( and $) in Rules
  • $+ : sendmail, 8.7. Wildcard Operators
  • $?
  • • sendmail, 14.1.3. Testing So Far
    • sendmail, 31.6. Macro Conditionals: $?, $|, and $.
  • $~ : sendmail, 32.2.2. Matching Any Not in a Class: $~
  • $| : sendmail, 31.6. Macro Conditionals: $?, $|, and $.
  • $_ macro
  • • sendmail, 20.2.4. Verify identd Information
    • sendmail, 23.9. The qf File Internals
    • sendmail, 26.1.3.9. relay= the host that sent or accepted the message
    • sendmail, 31.10. Alphabetized Reference
• (dot)
• • . line (qf file) : sendmail, 23.9. The qf File Internals
  • checking for in ${pd} : sendmail, D.1. Sun Enhancements
  • for current directory : Practical UNIX & Internet Security, 5.1.1. Directories
  • to end messages
  • • sendmail, 4.2. Verbose (-v)
    • sendmail, 30.8. Alphabetized F= Flags
  • filenames starting with, disabling creation of : Building Internet Firewalls, 8.2.1.6. Be careful of writable
  • host status file line : sendmail, B.1. Status file lines
  • leading in messages : sendmail, 34.8. Alphabetized Reference
  • trailing in FQDNs
  • • sendmail, 15.3. MX Records
    • sendmail, 17.4. Rule Set 4
    • sendmail, 29.5.1. Stripping Trailing Dots
  • .. directory : Practical UNIX & Internet Security, 5.1.1. Directories
  • .. for domain name : TCP/IP Network Administration, C.3.1. Standard Resource Records
• ! (exclamation point) and mail command : Practical UNIX & Internet Security, 15.1.3. mail Command
• # (hash mark; sharp sign) : Practical UNIX & Internet Security, 6.5.1. Message Digests
• • for comments
  • • sendmail, 5.1. Overview
    • sendmail, 5.2.2. Comments
    • sendmail, 27.2. Comments
    • sendmail, 38.2. Configuration Lines
    • TCP/IP Network Administration, 3.2. The Host Table
    • TCP/IP Network Administration, 5.4. The Internet Daemon
    • TCP/IP Network Administration, 7.7.1.1. A host configuration
    • TCP/IP Network Administration, 9.1.4. NFS Automounter
    • TCP/IP Network Administration, 9.2.1. The printcap File
    • TCP/IP Network Administration, 9.4. A BOOTP Server
    • TCP/IP Network Administration, A.1.1. The dip Script File
    • TCP/IP Network Administration, D.3. The dhcpd.conf Configuration File
  • disabling services with : Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services
  • in :include: lists : sendmail, 25.2.1. Comments in :include: Lists
  • lines in sendmail.cf : sendmail, 3.1. Role in the Filesystem
  • in m4 files : sendmail, 19.5. Pitfalls
• - (hyphen)
• • in machine conversation : sendmail, 4.2. Verbose (-v)
  • non-equivalent host : TCP/IP Network Administration, 12.2.5. Secure the r Commands
• -> (arrow), for copying files : TCP/IP Network Administration, 9.6.1. rdist
• () (parentheses), for continuation characters : TCP/IP Network Administration, C.3.1. Standard Resource Records
• % in addresses
• • sendmail, 17.1.5. The % Hack
  • sendmail, 21.5.1. Offsite MX Hosts
• + (plus sign)
• • in configuration file : sendmail, 1.3.1. The Configuration File
  • indicating a trusted host : TCP/IP Network Administration, 12.2.5. Secure the r Commands
  • in hosts.equiv file : Practical UNIX & Internet Security, 17.3.18.5. Searching for .rhosts files
  • marking users with : sendmail, 24.4.3. Plussed Users
  • in NIS
  • • Practical UNIX & Internet Security, 19.4. Sun's Network Information Service (NIS)
    • Practical UNIX & Internet Security, 19.4.4.6. NIS is confused about "+"
• ? for delivery agent flags
• • sendmail, 14.2. Headers Versus Delivery Agent Flags
  • sendmail, 35.4. ?flags? in Header Definitions
• " (quotation marks)
• • sendmail, 13.2.8. The Unquoted Space Replacement Character
  • sendmail, 19.1.1. m4 is greedy
  • sendmail, 31.3.2. Syntax of the Configuration File Macro's Text
  • dequote database class : sendmail, 33.8. Alphabetized Reference
  • in header fields : sendmail, 35.3.3. Quoted Strings in the Header Field
  • stripping from addresses
  • • sendmail, 30.8. Alphabetized F= Flags
    • sendmail, 33.3.4.9. -q don't strip quotes from key (V8.7 and above)
  • "" (expect nothing)
  • • TCP/IP Network Administration, 6.3.3. chat
    • TCP/IP Network Administration, A.3. chat
• (semicolon)
• • comment character : TCP/IP Network Administration, C.3.1. Standard Resource Records
  • ending gated configuration statements
  • • TCP/IP Network Administration, 7.7.1.1. A host configuration
    • TCP/IP Network Administration, B.2. The gated Configuration Language
• # (sharp sign; hash mark) : Practical UNIX & Internet Security, 6.5.1. Message Digests
• • for comments
  • • sendmail, 5.1. Overview
    • sendmail, 5.2.2. Comments
    • sendmail, 27.2. Comments
    • sendmail, 38.2. Configuration Lines
    • TCP/IP Network Administration, 3.2. The Host Table
    • TCP/IP Network Administration, 5.4. The Internet Daemon
    • TCP/IP Network Administration, 7.7.1.1. A host configuration
    • TCP/IP Network Administration, 9.1.4. NFS Automounter
    • TCP/IP Network Administration, 9.2.1. The printcap File
    • TCP/IP Network Administration, 9.4. A BOOTP Server
    • TCP/IP Network Administration, A.1.1. The dip Script File
    • TCP/IP Network Administration, D.3. The dhcpd.conf Configuration File
  • disabling services with : Practical UNIX & Internet Security, 17.3. Primary UNIX Network Services
  • in :include: lists : sendmail, 25.2.1. Comments in :include: Lists
  • lines in sendmail.cf : sendmail, 3.1. Role in the Filesystem
  • in m4 files : sendmail, 19.5. Pitfalls
• / (slash)
• • / flag : sendmail, 30.8. Alphabetized F= Flags
  • character in alias
  • • sendmail, 24.2.2. Delivery to Files
    • sendmail, 25.7.3. Appending to Files
  • IFS separator : Practical UNIX & Internet Security, 11.5.1.2. IFS attacks
  • root directory
  • • Practical UNIX & Internet Security, 5.1.1. Directories
    • (see also root directory)
• ~ (tilde)
• • in automatic backups : Practical UNIX & Internet Security, 18.2.3.5. Beware stray CGI scripts
  • for home directory
  • • Practical UNIX & Internet Security, 11.5.1.3. $HOME attacks
    • sendmail, 25.7. The User's ~/.forward File
  • ~! in mail messages : Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command
• | (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)

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