2013 IP Blacklist
When time allows, I like to post my collections of the worst IP addresses for the current year. Certainly, there are pros and cons to using an IP blacklist. In general, IPs are easily spoofed, change frequently, and are therefore unreliable as a general security strategy. But as a short-term solution, IP blacklists serve as an excellent method for dealing with specific and/or ongoing threats and attacks. Continue reading »
WP-Mix – A fresh mix of code snippets and tutorials
Wrapping up 2012, I finally launched xyCSS, which is all about responsive, grid-based design. To showcase xy.css, I used it to design WP-Mix.com, which also serves to house a growing collection of choice code snippets. Currently WP-Mix features over 100 snippets, tutorials, and other useful bits to help with WordPress development and web design in general. The topics are similar to those at Perishable Press (e.g., WordPress, PHP, JavaScript, CSS, etc.), but the posts are less-involved and aimed at intermediate […] Continue reading »
xy.css – Responsive Grid Design
For the past year or so, I’ve been heavy into responsive, grid-based design. In December, I “soft-launched” my new site, xyCSS with a simple tweet: Bringing it all together: https://perishablepress.com/xycss/ As implied (and explained), xy.css is a lightweight CSS template for creating semantic HTML5 designs on a responsive liquid matrix. Continue reading »
5G Blacklist 2013
Following up on much feedback (and this post), here is an update for the 5G Blacklist for 2013. As explained in the 2012 article (and elsewhere), the 5G Blacklist helps reduce the number of malicious URL requests that hit your website. It’s one of many ways to improve the security of your site and protect against evil exploits, bad requests, and other nefarious garbage. If your site runs on Apache and you’re familiar with .htaccess, the 5G is an effective […] Continue reading »
Protection for WordPress Pingback Vulnerability
It was recently reported about a WordPress Pingback Vulnerability, whereby an attacker has four potential ways to cause harm via xmlrpc.php, which is the file included in WordPress for XML-RPC Support (e.g., “pingbacks”). In this post, I offer a simple .htaccess technique to lock things down and protect against any meddling via the xmlrpc.php file. Continue reading »
(Please) Stop Using Unsafe Characters in URLs
Just as there are specifications for designing with CSS, HTML, and JavaScript, there are specifications for working with URIs/URLs. The Internet Engineering Task Force (IETF) clearly defines these specifications in RFC 3986: Uniform Resource Identifier (URI): Generic Syntax. Within that document, there are guidelines regarding which characters may be used safely within URIs. This post summarizes the information, and encourages developers to understand and implement accordingly. Continue reading »
Printed .htaccess books
After launching my new book .htaccess made easy back in September, I wanted to allow time to fix any errors or typos before sending the book to the printers. After a couple of months, I had updated the book three times with better code, new techniques, and design improvements. After a few final steps to optimize for print format, the books were ordered, printed and delivered fresh on Christmas Eve :) So to celebrate the event, all printed .htaccess books […] Continue reading »
CSS Hooks for User Submitted Posts
Here is a list of all CSS hooks available for the User Submitted Posts submission form. If you notice any errors or if I’ve missed anything, please let me know with a comment or by sending an email via my contact form. Thanks! Continue reading »
Blacklist Candidate 2012-11-13: Evil Scanner Edition
It’s been awhile since I’ve posted one of my Blacklist Candidate series articles. It’s always fun for me to talk (or write) about security related issues, especially when a quick slab of .htaccess can be used to take care of business. And that’s exactly what we have in this edition of the series, where I’m pleased to bring you Blacklist Candidate Number 2012-11-13: the “evil” scanner. Instead of scanning your site, collecting data, and moving on, Mr. 2012-11-13 continues to […] Continue reading »
BBQ Firewall (Free WordPress Plugin)
BBQ Firewall is a lightweight, super-fast plugin that protects your site against a wide range of threats. BBQ checks all incoming traffic and quietly blocks bad requests containing nasty stuff like eval(, base64_, and excessively long request-strings. This is a simple yet solid solution for sites that are unable to use a strong Apache/.htaccess firewall. Continue reading »
SFS Open Tracking
In the Simple Feed Stats plugin, Open Tracking enables you to track any web page or feed anywhere on the Web. This is done by using the open-tracking URL as the src for any <img /> tag. The SFS plugin then collects and displays the data, and provides shortcodes and template tags to display your feed stats anywhere on your site. In this post, we’ll see how to implement Open Tracking, walk through some examples, and glean a few tips […] Continue reading »
expose_php, Easter Eggs, and .htaccess
A reader recently brought to my attention a reported vulnerability on servers running PHP. It’s been known about for eons, but it’s new to me and it involves easter eggs in PHP so I thought it would be fun to share a quick post about what it is and how to prevent leakage of sensitive information about your server. It only takes a moment to disable the easter-egg information, should you decide to do so. Continue reading »
Protect Against Brute-force/Proxy Login Attacks
For the past week, I’ve been monitoring activity from a set of IP addresses involved with brute-force login attacks. Brute-force login attacks involve systematic guessing of passwords using various common usernames such as “admin” and “username”. So for example, an attack will target an array of sites, use “admin” as the username, and then make numerous attempts at “guessing” your password. And to obfuscate their malicious activity, the attack is executed from multiple IP addresses, either via proxy or possibly […] Continue reading »
New Book: .htaccess made easy
I’m proud to announce the launch of my new book on .htaccess, titled .htaccess made easy. It’s a book I’ve been wanting to write for years, since first getting hooked on .htaccess way back in 2006. Since then, I’ve learned a lot about .htaccess, Apache, security, and web-design in general — with many articles on the topic published here at Perishable Press and elsewhere on the Web. Everyone kept inspiring me to bring it all together and write a book […] Continue reading »
Prevent Duplicate Content in cPanel
In this guest-post, Jon Brown shares a solution to the age-old problem of preventing duplicate content from addon-domains in cPanel. Jon explains the issue and shares his methodology in crafting an elegant solution applied via .htaccess. If you’re using cPanel and want to improve your SEO, this will help. Here is the table of contents: Continue reading »
Tale of a Hacked Website
I love a good story. Almost as much as I enjoy securing websites. Put them together and you’ve got suspense, intrigue, and plenty of encoded gibberish. But no happy ending this time, in this case the smartest decision was to “pull it” and rebuild. The site was just wasted — completely riddled with malicious code. Without current backup data, it would’ve been “game over” for the site, and possibly the business. Continue reading »
