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Web Dev + WordPress + Security
86 posts related to: Block D-Bag Database Exploits

Blacklist Candidate 2012-11-13: Evil Scanner Edition

[ Blacklist Candidate Props ]

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: Protect Against Malicious URL Requests

[ BBQ: Block Bad Queries ]

Block Bad Queries (BBQ) is a simple script that protects your website against malicious URL requests. 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 that works great for sites where .htaccess is not available. The BBQ script is available as a plugin for WordPress or standalone script for any PHP-powered website. Continue reading »

Protect Against Brute-force/Proxy Login Attacks

[ Solomon Grundy of the Legion of Doom ]

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 »

Tale of a Hacked Website

[ Prise de la Bastille, by Jean-Pierre-Louis-Laurent Houel (Detail) ]

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 »

6G Firewall Beta

[ 6G Blacklist (beta) ]

Since releasing the 5G Blacklist earlier this year, malicious server scans and bad requests have surged with more novel attacks than I’ve seen since first getting into this stuff six years ago. In other words, now is the time to beef up security and lock things down. If you’re into monitoring your server and knowing your traffic, you may be observing the same recent spike in malicious activity. In response to these attacks, I’ve been secretly working on the next […] Continue reading »

WordPress Add-on for 5G Blacklist

Ill requests and malicious scans have been spiking recently, to the point where server performance was really taking a hit. One scan in particular hammered the server with thousands of bad requests in just a few minutes. There are people out there with strong scripts and small minds that are constantly scanning sites for vulnerabilities, and much of what I’ve seen is aimed primarily at WordPress. Continue reading »

5G Blacklist 2012

[ 5G (2012) ]

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 you’re tired of all the slow, bloated security plugins and expensive 3rd-party services, the 5G Blacklist is a solid solution to help protect your Apache-powered site. Continue reading »

5G Blacklist for Microsoft IIS

[ 5G (MS IIS) ]

By design the 5G Blacklist works on Apache servers, but thanks to Scott Stawarz, here is a version for Microsoft IIS. Disclaimer: I do not use any Microsoft server stuff, so make sure to properly test everything before running this code on a live/production site. Also, if you scroll down to the end of this article, you will find some useful bonus snippets. Continue reading »

Building the 5G Blacklist

[ Common Server Responses ]

Protecting your website is more important than ever. There are a million ways to do it, and this is one of them. In fact, it’s what I use to protect Perishable Press and other key sites. It’s called the 5G Blacklist, and it’s something I’ve been working on for a long time. The idea is simple enough: analyze bad requests and block them using a firewall/blacklist via .htaccess. Now in its 5th generation, the 5G Blacklist has evolved into a […] Continue reading »

Huge Collection of Code Snippets: HTAccess, PHP, WordPress, jQuery, HTML, CSS

[ WP Cron HTTP Auth ]

Please excuse this self-serving, miscellaneous post, but I’ve just got to purge all of these code snippets and scraps collected over the years. Whenever I update this site, I place any removed/unused code snippets into a giant note file for future reference, just in case. There’s all sorts of different types of code and snippets that just keep growing and growing and.. and finally it gets to a point where I just need to dump everything and start fresh. Welcome […] Continue reading »

Block Tough Proxies

If you want to block tough proxies like hidemyass.com, my previously posted .htaccess methods won’t work. Those methods will block quite a bit of proxy visits to your site, but won’t work on the stealthier proxies. Fortunately, we can use a bit of PHP to keep them out. Continue reading »

10 Characters for Your WordPress Blacklist

[ Screenshot: Comment Spam in Moderation ]

Quick WordPress tip for easily and quietly blocking a ton of comment spam. Akismet and other programs are good at catching most spam, but every now and then a bunch of weird, foreign-language spam will sneak past the filters and post live to your site. Here’s a good example of the kind of stuff that’s easy to block: Continue reading »

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 »

What a Malicious Server Scan Looks Like

Like most sites on the Web, Perishable Press is scanned constantly by malicious scripts looking for vulnerabilities and exploit opportunities. There is no end to the type and variety of malicious URL requests. It all depends on the script, the target, and the goal of the attack. Malicious scripts generally seek one of two things: 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 »

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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 »
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