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Populating Tables With CSV Data Via Sideband Connections

Introduction Datagroups and tables are the two primary methods we have in iRules for organizing key and value pairs. Both can be reused for subsequent connections. Datagroups have the advantage of being directly editable from the BIG-IP user interface, however they cannot be modified from within an iRule. This would open a potential security hole by allowing BIG-IP filesystem access from an iRule. Tables on the other hand must be populated from within an iRule, which allows for tracking...

Introduction to iStats Part 1: Overview

Version 11 of BIG-IP brought with it many enhancements and new features ranging across the entire product. iRules improvements and features were among the cooler things changed, in the opinion of this avid iRuler. Between sideband connections, iFiles and improvements of already existing functionality, it's hard to imagine there is more yet to discuss in v11 iRules goodness, but there is. iStats were introduced in v11, and are worth talking about, as they can dramatically change the way you are s...

Google reCAPTCHA Verification With Sideband Connections

Introduction Virtually every dynamic site on the Internet these days makes use of a CAPTCHA in some fashion. A CAPTCHA is used to verify that a human is driving the interaction with a particular function on a site. A CAPTCHA in its simplest form involves an end-user copying the text from an image to a text field. If the user-entered text matches that of the image, the user is allowed access to the requested resource. Variations to the classic CAPTCHA can involve doing simple math, solving ...

Transparent Web Application Bot Protection

The Problem HTML Web forms are a mechanism for someone to build a web page that allows a user to send data to a server for processing. Users can fill out the forms with elements such as checkboxes, radio buttons, or text fields. When a user clicks the associated “Submit” button, the data they entered into the form is sent to the server for processing. This is where the issue arises. Most form processing components are not smart enough to know where or how the data was sent to...

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