F5 Networks Developing iRules for BIG-IP

Introducing the BIG-IP System

Initially Setting Up the BIG-IP System

Archiving the BIG-IP System Configuration

Leveraging F5 Support Resources and Tools

Customizing Application Delivery with iRules

Triggering an iRule

Leveraging the DevCentral Ecosystem

Creating and Deploying iRules

Introducing iRule Constructs

Understanding iRule Events and Event Context

Working with iRule Commands

Logging from an iRule Using SYSLOG-NG (LOG Command)

Working with User-Defined Variables

Working with Operators and Data Types

Working with Conditional Control Structures (IF and SWITCH)

Incorporating Best Practices in iRules

Mastering Whitespace and Special Symbols

Grouping Strings

Developing and Troubleshooting Tips

Using Fiddler to Test and Troubleshoot iRules

Understanding the Need for Efficiency

Measure iRule Runtime Efficiency Using Timing Statistics

Modularizing iRules for Administrative Efficiency

Using Procedures to Modularize Code

Optimizing Logging

Using High-Speed Logging Commands in an iRule

Implementing Other Efficiencies

Using Looping Control Structures (WHILE, FOR, FOREACH Commands)

Integrating iRules into Web Application Defense

Mitigating HTTP Version Attacks

Mitigating Path Traversal Attacks

Using iRules to Defends Against Cross-Site Request Forgery (CSRF)

Mitigating HTTP Method Vulnerabilities

Securing HTTP Cookies with iRules

Adding HTTP Security Headers

Removing Undesirable HTTP Headers

Understanding Number Forms and Notation

Working with Strings (STRING and SCAN Commands)

Combining Strings (Adjacent Variables, CONCAT and APPEND Commands)

Using iRule String Parsing Functions (FINDSTR, GETFIELD, and SUBSTR Commands)

Reviewing HTTP Headers and Commands

Accessing and Manipulating HTTP Headers (HTTP::header Commands)

Other HTTP commands (HTTP::host, HTTP::status, HTTP::is_keepalive, HTTP::method, HTTP::version, HTTP::redirect, HTTP::respond, HTTP::uri)

Parsing the HTTP URI (URI::path, URI::basename, URI::query)

Parsing Cookies with HTTP::cookie

Selectively Compressing HTTP Data (COMPRESS Command)

Working with iFiles

Introducing Data Groups

Working with Old Format Data Groups (MATCHCLASS, FINDCLASS)

Working with New Format Data Groups (CLASS MATCH, CLASS SEARCH)

Implementing Universal Persistence (PERSIST UIE Command)

Working with the Stream Profile (STREAM Command)

Collecting Statistics Using a Statistics Profile (STATS Command)

Collecting Statistics Using iStats (ISTATS Command)

Reviewing the Local Variable Namespace

Working with Arrays (ARRAY Command)

Using Static and Global Variables

Using the Session Table (TABLE Command)

Processing Session Table Subtables

Counting ?Things? Using the Session Table