Plugin Sale! Save 15% on pro plugins with discount code: FALL2020
Web Dev + WordPress + Security

5G Firewall Beta

[ 5G (beta) ]

Updating the 4G Blacklist, the new 5G Firewall is now open for beta testing. The new code is better than ever, providing wider protection with less code and fewer false positives. I’ve had much success with this new firewall, but more testing is needed to ensure maximum compatibility and minimal issues. Continue reading »

HTTP Headers for ZIP File Downloads

You know when you you’re working on a project and get stuck on something, so you scour the Web for solutions only to find that everyone else seems to be experiencing the exact same thing. Then, after many hours trying everything possible, you finally stumble onto something that seems to work. This time, the project was setting up a secure downloads area for Digging into WordPress. And when I finally discovered a solution, I told myself that it was definitely […] Continue reading »

Latest Blacklist Entries

Recently cleared several megabytes of log files, detecting patterns, recording anomalies, and blacklisting gross offenders. Gonna break it down into three sections: User Agents Character Strings IP Addresses User Agents User-agents come and go, and are easily spoofed, but it’s worth a few lines of htaccess to block the more persistent bots that repeatedly scan your site with malicious requests. # Nov 2010 User Agents SetEnvIfNoCase User-Agent “MaMa ” keep_out SetEnvIfNoCase User-Agent “choppy” keep_out SetEnvIfNoCase User-Agent “heritrix” keep_out SetEnvIfNoCase User-Agent […] Continue reading »

2010 User-Agent Blacklist

[ 2010 User-Agent Blacklist ]

The 2010 User-Agent Blacklist blocks hundreds of bad bots while ensuring open-access for the major search engines: Google, Bing, Ask, Yahoo, et al. Blocking bad user-agents is an effective addition to any security strategy. It works like this: your site is getting hammered by rogue bots that waste valuable server resources and bandwidth. So you grab a copy of the 2010 UA Blacklist from Perishable Press, include it in your site’s root .htaccess file, and enjoy better security and performance. […] Continue reading »

Protect Your Site with a Blackhole for Bad Bots

[ Black Hole (Vector) ]

One of my favorite security measures here at Perishable Press is the site’s virtual Blackhole trap for bad bots. The concept is simple: include a hidden link to a robots.txt-forbidden directory somewhere on your pages. Bots that ignore or disobey your robots rules will crawl the link and fall into the honeypot trap, which then performs a WHOIS Lookup and records the event in the blackhole data file. Once added to the blacklist data file, bad bots immediately are denied […] Continue reading »

2010 IP Blacklist

Over the course of each year, I blacklist a considerable number of individual IP addresses. Every day, Perishable Press is hit with countless numbers of spammers, scrapers, crackers and all sorts of other hapless turds. Weekly examinations of my site’s error logs enable me to filter through the chaff and cherry-pick only the most heinous, nefarious attackers for blacklisting. Minor offenses are generally dismissed, but the evil bastards that insist on wasting resources running redundant automated scripts are immediately investigated […] Continue reading »

htaccess Redirect to Maintenance Page

Redirecting visitors to a maintenance page or other temporary page is an essential tool to have in your tool belt. Using HTAccess, redirecting visitors to a temporary maintenance page is simple and effective. All you need to redirect your visitors is the following code placed in your site’s root HTAccess: # MAINTENANCE-PAGE REDIRECT <ifmodule mod_rewrite.c> RewriteEngine on RewriteCond %{REMOTE_ADDR} !^123\.456\.789\.000 RewriteCond %{REQUEST_URI} !/maintenance.html$ [NC] RewriteCond %{REQUEST_URI} !\.(jpe?g?|png|gif) [NC] RewriteRule .* /maintenance.html [R=302,L] </ifmodule> That is the official copy-&-paste goodness right […] Continue reading »

Stop 404s for Mobile Versions of Your Site

[ Stop 404 Requests for Mobile Sites ]

If you’ve been keeping an eye on your 404 errors recently, you will have noticed an increase in requests for nonexistent mobile files and directories, especially over the past year or so. The scripts and bots requesting these files from your server seem to be looking for a mobile version of your site. Unfortunately, they are wasting bandwidth and resources in the process. It has become common to see the following 404 errors constantly repeated in your log files: http://domain.tld/apple-touch-icon.png […] Continue reading »

Is it Secret? Is it Safe?

[ Enjoying the Evening ]

Whenever I find myself working with PHP or messing around with server settings, I nearly always create a phpinfo.php file and place it in the root directory of whatever domain I happen to be working on. These types of informational files employ PHP’s handy phpinfo() function to display a concise summary of all of your server’s variables, which may then be referenced for debugging purposes, bragging rights, and so on. While this sort of thing is normally okay, I frequently […] Continue reading »

3 Ways to Preload Images with CSS, JavaScript, or Ajax

Preloading images is a great way to improve the user experience. When images are preloaded in the browser, the visitor can surf around your site and enjoy extremely faster loading times. This is especially beneficial for photo galleries and other image-heavy sites where you want to deliver the goods as quickly and seamlessly as possible. Preloading images definitely helps users without broadband enjoy a better experience when viewing your content. In this article, we’ll explore three different preloading techniques to […] Continue reading »

Really Simple Browser Detection with jQuery

For my Serious redesign, I push the envelope in terms of CSS’ advanced selector functionality. Stuff like: p:first-child p:first-child:first-letter p:first-child:after p:first-child:first-line Plus lots of other stylistic tricks that require CSS3 support in order to display as intended. Fortunately, most of the browsers to which I am catering with this new design have no problems with most of the advanced stuff. Of course, Internet Explorer chokes on just about everything, but fortunately IE’s proprietary conditional comments make it easy to fix […] Continue reading »

Stupid WordPress Tricks

[ WordPress ]

One of the most popular articles here at Perishable Press is my January 2005 post, Stupid htaccess Tricks. In that article, I bring together an extensive collection of awesome copy-&-paste HTAccess code snippets. Four years later, people continue to tell me how much they enjoy and use the content as a bookmarked reference for many of their HTAccess needs. The article was even published in a book on Joomla! Security. This is very inspiring to me, so I have decided […] Continue reading »

Perfect Pre Tags

If you operate a website that features lots of code examples, you know how important it is to spend some quality time styling the <pre></pre> element. When left unstyled, wild <pre></pre> tags will mangle your preformatted content and destroy your site’s layout. Different browsers treat the <pre></pre> tag quite differently, varying greatly in their default handling of font-sizing, scrollbar-rendering, and word-wrapping. Indeed, getting your preformatted code to look consistent, usable, and stylish across browsers is no easy task, but it […] Continue reading »

Pimp Your 404: Presentation and Functionality

[ Screenshot: Default Apache 404 Error Page ]

I have been wanting to write about 404 error pages for quite awhile now. They have always been very important to me, with customized error pages playing a integral part of every well-rounded web-design strategy. Rather than try to re-invent the wheel with this, I think I will just go through and discuss some thoughts about 404 error pages, share some useful code snippets, and highlight some suggested resources along the way. In a sense, this post is nothing more […] Continue reading »

Stupid Twitter Tricks

[ Twitter ]

Might as well face it, Twitter is here to stay. Not that it’s all that bad, just used to be a lot more laid-back and enjoyable. These days it seems to have been taken over by the lowest common-denominator, mostly high-school twits or useless commercial propaganda. Even so, I still enjoy tweeting the occasional profound thought once in awhile, and even like to play around with various types of “advanced” Twitter functionality. You know, cool stuff like including “Tweet This!” links […] Continue reading »

HTAccess Privacy for Specific IPs

Running a private site is all about preventing unwanted visitors. Here is a quick and easy way to allow access to multiple IP addresses while redirecting everyone else to a custom message page. To do this, all you need is an HTAccess file and a list of IPs for which you would like to allow access. Continue reading »

Welcome
Perishable Press is operated by Jeff Starr, a professional web developer and book author with two decades of experience. Here you will find posts about web development, WordPress, security, and more »
The Tao of WordPress: Become your own WordPress guru.
Thoughts
Air finally clearing here in WA. Feeling grateful to breathe again. #oxygenmatters
Past week here in WA state has been hellish. So much smoke, like living in a chimney.
Now in September, I’m where I wanted to be in March.
Spent some time updating my article on unsafe characters, once again current with latest IETF specification.
Just realized that “Neo” is an anagram for “One”. As in, “he is the One” (The Matrix).
To get VLC app to load all songs (including subfolders), go to Preferences ▸ Show All ▸ Playlist ▸ Subdirectory behavior ▸ Expand.
Switching from PhotoShop to Affinity Photo is one of the most liberating work-related things I've done in 20 years.
Newsletter
Get news, updates, deals & tips via email.
Email kept private. Easy unsubscribe anytime.