Building the 3G Blacklist, Part 4: Improving RedirectMatch in the Original 2G Blacklist
In this continuing five-article series, I share insights and discoveries concerning website security and protecting against malicious attacks. In this fourth article, I build upon previous ideas and techniques by improving the directives contained in the original 2G Blacklist. Subsequent articles will focus on key blacklist strategies designed to protect your site transparently, effectively, and efficiently. At the conclusion of the series, the five articles will culminate in the release of the next generation 3G Blacklist. Continue reading »
Building the 3G Blacklist, Part 3: Improving Security by Blocking Rogue User Agents
In this continuing five-article series, I share insights and discoveries concerning website security and protecting against malicious attacks. In this third article, I discuss targeted, user-agent blacklisting and present an alternate approach to preventing site access for the most prevalent and malicious user agents. Subsequent articles will focus on key blacklist strategies designed to protect your site transparently, effectively, and efficiently. At the conclusion of the series, the five articles will culminate in the release of the next generation 3G […] Continue reading »
Building the 3G Blacklist, Part 2: Improving Security by Preventing Query-String Exploits
In this continuing five-article series, I share insights and discoveries concerning website security and protecting against malicious attacks. In this second article, I present an incredibly powerful method for eliminating malicious query string exploits. Subsequent articles will focus on key blacklist strategies designed to protect your site transparently, effectively, and efficiently. At the conclusion of the series, the five articles will culminate in the release of the next generation 3G Blacklist. Improving Security by Preventing Query String Exploits A vast […] Continue reading »
Building the 3G Blacklist, Part 1: Improving Security by Exploiting Server Attack Patterns
In this series of five articles, I share insights and discoveries concerning website security and protecting against malicious attacks. In this first article of the series, I examine the process of identifying attack trends and using them to immunize against future attacks. Subsequent articles will focus on key blacklist strategies designed to protect your site transparently, effectively, and efficiently. At the conclusion of the series, the five articles will culminate in the release of the next generation 3G Blacklist. Improving […] Continue reading »
Universal www-Canonicalization via htaccess
During my previous rendezvous involving comprehensive canonicalization for WordPress, I offer my personally customized technique for ensuring consistently precise and accurate URL delivery. That particular method targets WordPress exclusively (although the logic could be manipulated for general use), and requires a bit of editing to adapt the code to each particular configuration. In this follow-up tutorial, I present a basic www-canonicalization technique that accomplishes the following: Continue reading »
Toggle Element Visibility via JavaScript
Recently, while restoring the popular Jupiter! WordPress theme, which several readers use to “skin” the Perishable Press website, I found myself searching for a simple, effective JavaScript technique for toggling element visibility. Specifically, I needed to accomplish the following design goals: Continue reading »
Obsessive CSS Code Formatting: Opening and Closing Brackets
Following my recent post on CSS code formatting, I was delightfully surprised to have received such insightful, enthusiastic feedback. Apparently, I am not the only person passionate about the subtle nuances involved with the formatting of CSS code. So, to continue the conversation, let’s explore several techniques for writing the opening and closing brackets of CSS declaration blocks. Continue reading »
The Pros and Cons of Blogging
Among my friends, family, coworkers, and other social acquaintances, there are not many “bloggers.” In fact, there aren’t any. Two or three of my old friends have websites that are updated once or twice per year, but none are actively blogging and sharing their ideas with the online community. Many of my “non-blogging” peeps simply don’t “get it.” To them, the whole idea of consistently updating a website with new material seems like a big waste of time. In fact, […] Continue reading »
Drop-Dead Easy Random Images via PHP
Recently, while restoring my collection of Perishable Press themes, I needed a fast, effective way to randomize a series of images using PHP. After playing around with several possibilities, I devised the following drop-dead easy technique: Continue reading »
Pure CSS: Better Image Preloading without JavaScript
After reading my previous article on preloading images without JavaScript1, Nanda pointed out that adding extra markup to preload images is not the best approach, especially where Web Standards are concerned. Mobile devices, for example, may experience problems when dealing with the following preloading technique: /* ADD THIS TO CSS */ div#preloaded-images { position: absolute; overflow: hidden; left: -9999px; top: -9999px; height: 1px; width: 1px; } <!– ADD THIS TO XHTML –> <div id="preloaded-images"> <img src="https://perishablepress.com/image-01.png" width="1" height="1" alt="Image 01" […] Continue reading »
How to Edit the Firefox Custom Dictionary
As one who takes full advantage of the custom dictionary in Firefox, I occasionally find myself adding nonexistent or misspelled words to the dictionary by accident. Not wanting to deal with a false negative down the road, I always take the time to stop what I’m doing, locate the custom dictionary, and remove the erroneous term. Finally getting sick of trying to remember the esoteric location in which Firefox stores the personal dictionary, I decided to make a few notes […] Continue reading »
Obsessive CSS Code Formatting: Patterns and Trends
Call me strange, but I format each of my CSS rules according to the following structure/pattern: div#example element { margin: 5px 15px 5px 0; border: 1px solid #444; line-height: 1.5em; text-align: center; background: #222; font-size: 10px; display: block; padding: 5px; color: #888; float: left; } div#another div.example element { border: 1px solid #444; margin: 7px 0 17px 0; letter-spacing: 1px; font-weight: bold; background: #222; font-size: 1.1em; cursor: pointer; display: block; padding: 3px; width: 308px; color: #888; clear: left; float: left; […] Continue reading »
Custom HTTP Errors via htaccess
We all know how important it is to deliver sensible, helpful 404 error pages to our visitors. There are many ways of achieving this functionality, including the well-known htaccess trick used to locally redirect users to custom error pages: # htaccess custom error pages ErrorDocument 400 /errors/400.html ErrorDocument 401 /errors/401.html ErrorDocument 403 /errors/403.html ErrorDocument 404 /errors/404.html ErrorDocument 500 /errors/500.html ..and so on. These directives basically tell Apache to deliver the designated documents for their associated error types. Many webmasters and […] Continue reading »
WordPress Tip: Careful with that Autosave, Eugene
After upgrading WordPress from version 2.0.5 to 2.3.3, I did some experimenting with the “post autosave” feature. The autosave feature uses some crafty ajax to automagically save your post every 2 minutes (120 seconds by default). Below the post-editing field, you will notice a line of text that displays the time of the most recent autosave, similar to the following: Continue reading »
WordPress Tip: Remove Spam from the Comment Subscription Manager
After investigating some unusual 404 errors the other day, I found myself digging through the WordPress Admin Area trying to locate the “Subscribe to Comments” options panel. As it turns out, administrative options for the Subscribe to Comments plugin are split into two different areas. First, the S2C plugin provides configuration options under the WordPress General Settings > “Subscribe to Comments”, which enables users to tweak everything from subscription messages to custom CSS styles. New to me was the other […] Continue reading »
What is My WordPress Feed URL?
For future reference, this article covers each of the many ways to access your WordPress-generated feeds1. Several different URL formats are available for the various types of WordPress feeds — posts, comments, and categories — for both permalink and default URL structures. For each example, replace “http://example.com/” with the URL of your blog. Note: even though your blog’s main feed is accessible through many different URLs, there are clear benefits to using a single, consistent feed URL throughout your site. […] Continue reading »
