F5 Developing iRules for BIG-IP Training v14

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F5 Developing iRules for BIG-IP Training v14 Course with Hands-on Labs

This F5 Developing iRules for BIG-IP Training v14 course provides networking professionals a functional understanding of iRules development. The F5 Developing iRules for BIG-IP Training v14 course builds on the foundation of the Administering BIG-IP or Configuring LTM course, demonstrating how to logically plan and write iRules to help monitor and manage common tasks involved with processing traffic on the BIG-IP system. Extensive F5 Developing iRules for BIG-IP Training v14 course labs consist of writing, applying and evaluating the effect of iRules on local traffic. This hands-on F5 Developing iRules for BIG-IP Training v14 course includes lectures, labs, and discussions.

Duration: 3 days

F5 Developing iRules for BIG-IP Training v14 Related Courses

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• If you are familiar with some aspects of this F5 Developing iRules for BIG-IP Training v14 course, we can omit or shorten their discussion.
• We can adjust the emphasis placed on the various topics or build the F5 Developing iRules for BIG-IP Training v14 course around the mix of technologies of interest to you (including technologies other than those included in this outline).
• If your background is nontechnical, we can exclude the more technical topics, include the topics that may be of special interest to you (e.g., as a manager or policy-maker), and present the F5 Developing iRules for BIG-IP Training v14 course in manner understandable to lay audiences.

Audience / Target Group

• System administrators
• Network administrators
• Application developers
• Individuals responsible for the customization of traffic flow through a BIG-IP system


Completion of:

• F5 Administrating BIG-IP
• F5 Configuring BIG-IP Local Traffic Manager (LTM)

F5 Developing iRules for BIG-IP Training v14 - Objectives:

After completing this F5 Developing iRules for BIG-IP Training v1.2 course, attendees will be able to:

• Describe the role of iRules in customizing application delivery on a BIG-IP system
• Describe best practices for using iRules
• Define event context, and differentiate between client-side and server-side contexts, request and response contexts, and local and remote contexts
• Trigger an iRule for both client-side and server-side request and response events
• Assign multiple iRules to a virtual server and control the order in which duplicate events trigger
• Describe and use a testing methodology for iRule development and troubleshooting
• Use local variables, static variables, lists, arrays, the session table, and data groups to store information needed for iRule execution
• Write iRules that are optimized for runtime and administrative efficiency
• Use control structures to conditionally branch or loop within an iRule
• Log from an iRule using Linux syslog-ng or TMOS high-speed logging (HSL)
• Incorporate coding best practices during iRule development
• Use analyzer tools to capture and view traffic flow on both client-side and server-side contexts
• Collect and use timing statistics to measure iRule runtime efficiency
• Write iRules to help mitigate and defend from some common HTTP attacks
• Differentiate between decimal, octal, hexadecimal, floating-point, and exponential notation
• Parse and manipulate strings using Tcl commands and iRule functions
• Write iRules to access and manipulate HTTP header information
• Write iRules to collect customized statistics
• Implement universal persistence via an iRule
• Modify payload content using an iRule with a stream profile

F5 Developing iRules for BIG-IP Training v14 - Course Content:

Chapter 1: Setting Up the BIG-IP System

Introducing the BIG-IP System
Initially Setting Up the BIG-IP System
Archiving the BIG-IP System Configuration
Leveraging F5 Support Resources and Tools

Chapter 2: Getting Started with iRules

Customizing Application Delivery with iRules
Triggering an iRule
Leveraging the DevCentral Ecosystem
Creating and Deploying iRules

Chapter 3: Exploring iRule Elements

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

Chapter 4: Developing and Troubleshooting iRules

Mastering Whitespace and Special Symbols
Grouping Strings
Developing and Troubleshooting Tips
Using Fiddler to Test and Troubleshoot iRules

Chapter 5: Optimizing iRule Execution

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)

Chapter 6: Securing Web Applications with iRules

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

Chapter 7: Working with Numbers and Strings

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)

Chapter 8: Processing the HTTP Payload

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)

Chapter 9: Working with iFiles and Data Groups

Working with iFiles
Introducing Data Groups
Working with Old Format Data Groups (MATCHCLASS, FINDCLASS)
Working with New Format Data Groups (CLASS MATCH, CLASS SEARCH)

Chapter 10: Using iRules with Universal Persistence, Stream, and Statistics Profiles

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)

Chapter 11: Incorporating Advanced Variables

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

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