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Index: O
- O configuration command
- sendmail, 5.3.7. Options
- sendmail, 13.1. Options: An Overview
- -o database switch
: sendmail, 33.3.4.8. -o the database file is optional (V8.1 and above)
- -O database switch
: sendmail, 33.3.4.7. -O adaptive versus never add a null (V8.2 and above)
- o flag
: sendmail, 30.8. Alphabetized F= Flags
- O lines in sendmail.cf
: sendmail, 3.1. Role in the Filesystem
- $o macro
: (see OperatorChars (o) option)
- o option
: (see OldStyleHeaders (o) option)
- O option
: (see DaemonPortOptions (O) option)
- -o switch (F command)
: sendmail, 12.2. The File Form of Class
- -o switch (makemap)
: sendmail, 33.2.1.4. -o append to, don't overwrite the file
- -o switch (sendmail)
: sendmail, 36.7. Alphabetized Reference
- -O switch (sendmail)
: sendmail, 36.7. Alphabetized Reference
- OBJADD= directive
: sendmail, 18.4.10. OBJADD=
- object identifier
: TCP/IP Network Administration, 11.9. Simple Network Management Protocol
- obscurity
- Building Internet Firewalls, 1.3.2. Security Through Obscurity
- Practical UNIX & Internet Security, 2.5. The Problem with Security Through Obscurity
- Practical UNIX & Internet Security, 2.5.3. Final Words: Risk Management Means Common Sense
- Practical UNIX & Internet Security, 8.8.9. Account Names Revisited: Using Aliases for Increased
- Practical UNIX & Internet Security, 18.2.4. Keep Your Scripts Secret!
- obtaining
- BIND via FTP
: sendmail, 21.1.1. Which DNS? 4.8.3 or 4.9?
- db library package
: sendmail, C.2. Get the Source
- sendmail source code
- sendmail, 2.1. Get the Source
- sendmail, 18.3. Obtain the Source
- octal file permissions
- Practical UNIX & Internet Security, 5.2.3. Calculating Octal File Permissions
- Practical UNIX & Internet Security, 5.2.4. Using Octal File Permissions
- octal-type arguments
: sendmail, 34.5. Option Argument Types
- octet data
- Practical UNIX & Internet Security, 16.2.1. Internet Addresses
- TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
- octet-stream application subtype
: TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
- Odlyzko, Andrew
: Practical UNIX & Internet Security, 19.3.4. Limitations of Secure RPC
- -odq switch
: sendmail, 23.6.1. Periodically with -q
- Oerrs (output errors)
: TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat
- OFB (output feedback)
: Practical UNIX & Internet Security, 6.4.4.2. DES modes
- offsite primary name servers
: sendmail, 21.5.2. Offsite Servers
- "ok" message
: sendmail, 4.2. Verbose (-v)
- old-style address lists
: sendmail, 13.2.7. Accept Old-Style Lists of Addresses
- OLD_NEWDB macro
: sendmail, 18.8. Alphabetized Reference
- OldStyleHeaders (o) option
- sendmail, 13.2.7. Accept Old-Style Lists of Addresses
- sendmail, 34.8. Alphabetized Reference
- on program
: Building Internet Firewalls, 2.3. Remote Terminal Access and Command
- on-the-job security
- Practical UNIX & Internet Security, 13.2. On the Job
- Practical UNIX & Internet Security, 13.2.6. Departure
- one
: Practical UNIX & Internet Security, 9.2.1. Comparison Copies
- one-command accounts
: Practical UNIX & Internet Security, 8.1.3. Accounts That Run a Single Command
- one-time pad encryption
- Practical UNIX & Internet Security, 6.4.7. An Unbreakable Encryption Algorithm
- Practical UNIX & Internet Security, 8.7.3. Code Books
- one-time passwords
- Building Internet Firewalls, 10.3.1. One-Time Passwords
- Practical UNIX & Internet Security, 8.7. One-Time Passwords
- Practical UNIX & Internet Security, 8.7.3. Code Books
- Practical UNIX & Internet Security, 17.4. Security Implications of Network Services
- Practical UNIX & Internet Security, 23.3. Tips on Writing Network Programs
- TCP/IP Network Administration, Preface
- TCP/IP Network Administration, 12.2.3. One-Time Passwords
- One-time Passwords In Everything (OPIE)
: TCP/IP Network Administration, 12.2.4. OPIE
- one-way phone lines
: Practical UNIX & Internet Security, 14.4.1. One-Way Phone Lines
- ONEX command, in ESMTP
: TCP/IP Network Administration, 3.4.3. Multipurpose Internet Mail Extensions
- open access, tradition of
: Practical UNIX & Internet Security, 1.4.1. Expectations
- open accounts
- Practical UNIX & Internet Security, 8.1.4. Open Accounts
- Practical UNIX & Internet Security, 8.1.4.6. Potential problems with rsh
- Practical UNIX & Internet Security, 8.8.7. Algorithm and Library Changes
- open command
- Practical UNIX & Internet Security, 5.1.7. File Permissions in Detail
- Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- O_CREAT and O_EXCL flags
: Practical UNIX & Internet Security, 23.2. Tips on Avoiding Security-related Bugs
- open file descriptors
: sendmail, 26.3.3.1. -- open file descriptors: --
- open protocol suite
: TCP/IP Network Administration, 3.7.1. File Sharing
- Open Shortest Path First
: (see OSPF protocol)
- Open Software Foundation (OSF)
: Practical UNIX & Internet Security, 1.3. History of UNIX
- Open System Interconnection (OSI)
- Building Internet Firewalls, C.2.1. OSI Reference Model
- Practical UNIX & Internet Security, 16.4.4. OSI
- TCP/IP Network Administration, 1.2. A Data Communications Model
- TCP/IP Network Administration, 6.1.1. Determining the Interface Name
- opendir library call
: Practical UNIX & Internet Security, 5.4. Using Directory Permissions
- openlog command
: sendmail, 26.1.1. syslog(3)
- operating systems
- Building Internet Firewalls, Platforms
- Practical UNIX & Internet Security, 1.2. What Is an Operating System?
- Practical UNIX & Internet Security, 12.3.3. Other Media
- administration
: (see system administration)
- choosing
: Building Internet Firewalls, 5.3.1. What Operating System?
- errors
- sendmail, 36.5.3. EX_IOERR A System I/O Error Occurred
- sendmail, 36.5.5. EX_OSERR A System Resource Error
- file failure
: sendmail, 36.5.6. EX_OSFILE A Critical System File Failure
- fixing bugs in
: Building Internet Firewalls, 5.8.1.2. Fix all known system bugs
- installation of
: Building Internet Firewalls, 5.8.1.1. Start with a minimal clean operating system
- keeping secret
: Practical UNIX & Internet Security, 2.5. The Problem with Security Through Obscurity
- load
: (see performance)
- multiple, and proxying
: Building Internet Firewalls, 7.1. Why Proxying?
- OSTYPE declaration
- sendmail, 16.2.2. OSTYPE
- sendmail, 19.3.1. OSTYPE()
- TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros
- defines, listed
: TCP/IP Network Administration, E.3.3. OSTYPE
- in sendmail
- TCP/IP Network Administration, E.3. m4 sendmail Macros
- TCP/IP Network Administration, E.3.3. OSTYPE
- testing reload of
: Building Internet Firewalls, 13.5.6. Testing the Reload of the Operating
- UNIX
: (see UNIX)
- OperatorChars (o) option
- sendmail, 8.3. Rule Sets
- sendmail, 31.10. Alphabetized Reference
- sendmail, 34.8. Alphabetized Reference
- operators, token separation
: (see OperatorChars (o) option)
- opiekey software
: TCP/IP Network Administration, 12.2.4. OPIE
- opiepassword
: TCP/IP Network Administration, 12.2.4. OPIE
- ${opmode} macro
: sendmail, 31.10. Alphabetized Reference
- optic cables
: (see cables, network)
- optical vampire taps
: Practical UNIX & Internet Security, 12.3.1.5. Fiber optic cable
- option set, invoking dialup IP (dip)
: TCP/IP Network Administration, A.1. Dial-Up IP
- optional database files
: sendmail, 33.3.4.8. -o the database file is optional (V8.1 and above)
- Options command
: Practical UNIX & Internet Security, 18.3.2. Commands Within the <Directory>
- options entry, in resolv.conf
: TCP/IP Network Administration, 8.2.1. The Resolver Configuration File
- option field, in DHCP
: TCP/IP Network Administration, 3.6.1. Dynamic Host Configuration Protocol
- options file
- TCP/IP Network Administration, 6.3.1. The PPP Daemon
- TCP/IP Network Administration, 6.3.2. Dial-Up PPP
- options statement
: TCP/IP Network Administration, 5.3.1.1. Options
- in gated
: TCP/IP Network Administration, B.5. Options Statements
- INET
- TCP/IP Network Administration, 5.3.1.1. Options
- TCP/IP Network Administration, A.2. The PPP Daemon
- options, sendmail
- sendmail, 3.1. Role in the Filesystem
- sendmail, 4. How to Run sendmail
- sendmail, 5.3.7. Options
- sendmail, 13. Setting Options
- sendmail, 19.4.1. Options
- sendmail, 34. Options
- (see also switches, command-line)
- m4 and
: sendmail, 34.3. Configuring with V8 m4 Options
- multicharacter
- sendmail, 34.1.2. V8.7 Multicharacter Options in the Command Line
- sendmail, 36.7. Alphabetized Reference
- required
: sendmail, 13.2. Required Options
- safe
: sendmail, 34.1.4. Options that Are Safe
- security
: sendmail, 22.8.3. Security Options
- single-character
: sendmail, 36.7. Alphabetized Reference
- testing
: sendmail, 13.3. Testing the Options
- options.device file
: TCP/IP Network Administration, A.2. The PPP Daemon
- Orange Book
: Practical UNIX & Internet Security, 2.3.3. Adding Up the Numbers
- ORCPT address
: sendmail, 23.9. The qf File Internals
- org domain
: TCP/IP Network Administration, 3.3.1. The Domain Hierarchy
- origin date, message
: (see $a macro)
- originate mode
: Practical UNIX & Internet Security, 14.3.1. Originate and Answer
- originate testing
: Practical UNIX & Internet Security, 14.5.3.1. Originate testing
- orphaned locks
: sendmail, 23.2.3.3. Locks can get stuck
- OSF (Open Software Foundation)
: Practical UNIX & Internet Security, 1.3. History of UNIX
- OSF/1 operating system
: Practical UNIX & Internet Security, 1.3. History of UNIX
- OSI (Open System Interconnection)
- Building Internet Firewalls, C.2.1. OSI Reference Model
- Practical UNIX & Internet Security, 16.4.4. OSI
- TCP/IP Network Administration, 1.2. A Data Communications Model
- TCP/IP Network Administration, 6.1.1. Determining the Interface Name
- OSPF protocol
- TCP/IP Network Administration, Preface
- TCP/IP Network Administration, 1.7. Application Layer
- TCP/IP Network Administration, 7.4.3. Open Shortest Path First
- authenticating packets
: TCP/IP Network Administration, B.8.1. The ospf Statement
- enabling (in gated)
- TCP/IP Network Administration, 7.7.1.2. Interior gateway configurations
- TCP/IP Network Administration, 7.7.1.3. Exterior gateway configuration
- TCP/IP Network Administration, B.8.1. The ospf Statement
- ospf statement (in gated)
: TCP/IP Network Administration, B.8.1. The ospf Statement
- ospfase protocol
: TCP/IP Network Administration, 7.7.1.3. Exterior gateway configuration
- OSTYPE command (m4)
- sendmail, 16.2.2. OSTYPE
- sendmail, 19.3.1. OSTYPE()
- TCP/IP Network Administration, 10.4.1.1. Building a sendmail.cf with m4 macros
- defines, listed
: TCP/IP Network Administration, E.3.3. OSTYPE
- in sendmail
- TCP/IP Network Administration, E.3. m4 sendmail Macros
- TCP/IP Network Administration, E.3.3. OSTYPE
- out-of-date files, defined
: TCP/IP Network Administration, 9.6.1. rdist
- outgoing (outbound)
- calls
: Practical UNIX & Internet Security, 14.5. Modems and UNIX
- finger requests
: Building Internet Firewalls, 8.8.1. finger
- mail, logging
: Practical UNIX & Internet Security, 10.4.2. Mail
- packets
: Building Internet Firewalls, 6.2.2. Be Careful of `Inbound'
- filtering rules for
: Building Internet Firewalls, 6.8.6. It Should Apply Rules Separately to
- Telnet
: Building Internet Firewalls, 6.7.1. Outbound Telnet Service
- Outcome table (NIS+)
: Practical UNIX & Internet Security, 19.5.3. NIS+ Tables
- outdated software
: (see software)
- output
- debugging
: sendmail, 37.3. Interpreting the Output
- errors (Oerrs)
: TCP/IP Network Administration, 11.4.3. Checking the Interface with netstat
- feedback (OFB)
: Practical UNIX & Internet Security, 6.4.4.2. DES modes
- rule testing
: sendmail, 38.6.4. The Output
- syslog
: sendmail, 26.1.3. syslog's Output
- outsiders
: Practical UNIX & Internet Security, 13.3. Outsiders
- overload attacks
- Practical UNIX & Internet Security, 25.2. Overload Attacks
- Practical UNIX & Internet Security, 25.2.5. Soft Process Limits: Preventing Accidental Denial
- overruns
: (see buffers, overruns)
- overtime
: Practical UNIX & Internet Security, 13.2.3. Performance Reviews and Monitoring
- overwhelming the server
: TCP/IP Network Administration, 9.4. A BOOTP Server
- overwriting
- files
: sendmail, 33.2.1.4. -o append to, don't overwrite the file
- media
: Practical UNIX & Internet Security, 12.3.2.3. Sanitize your media before disposal
- rule sets
: sendmail, 8.4. Rules
- OW- (sendmail.cf)
: Practical UNIX & Internet Security, 17.3.4.2. Using sendmail to receive email
- owner, mailing list
: sendmail, 25.3. Defining a Mailing List Owner
- owner-admin alias
: TCP/IP Network Administration, 10.3. sendmail Aliases
- owners of information
: Practical UNIX & Internet Security, 2.4.4.1. Assign an owner
- owners, changing
: Practical UNIX & Internet Security, 5.7. chown: Changing a File's Owner
- ownership
: (see permissions)
- ownership notices
: Practical UNIX & Internet Security, 26.2.6. Other Tips
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