Internet Census 2012 – Port scanning using insecure embedded devices – Carna Botnet
While playing around with the Nmap Scripting Engine (NSE) we discovered an amazing number of open embedded devices on the Internet. Many of them are based on Linux and allow login to standard BusyBox with empty or default credentials. We used these devices to build a distributed port scanner to scan all IPv4 addresses. These scans include service probes for the most common ports, ICMP ping, reverse DNS and SYN scans. We analyzed some of the data to get an estimation of the IP address usage.
Web Development Glossary
Fsockopen Magic
PHP's fsockopen function lets you open an Internet or Unix domain socket connection for connecting to a resource, and is one of the most powerful functions available in the php language.
DreamHost Server IP Address List
A list of all DreamHost Servers and corresponding IP address. The dreamhost.com DNS zone is currently having troubles, so most hostnames within this zone are not resolving.Apache Logging for Remote Addresses using X-Forwarded-For
DNS Round Robin Configuration using Rsync over SSH
The goal is to add the HostGator server to be an exact mirror of the s.askapache.net domain, then to add that server as a 2nd A record to my DNS zone. That way half the visitors to the size will be taking up resources and bandwidth on the HostGator server instead of mine.
Round Robin A records in DNS are intended to evenly distribute queries between each host of the same name. Using some tricks straight out of a hackers toolbox we can verify if the distribution is taking place. (It is.)
ListOfErrors
Undetectable Sniffing On Ethernet
I have been in some tight spots where I had to sniff a password or two off the wire, or sniff some packets off the wire and based on the packets content perform some action... Accidentally, I stumbled on a method to sniff data while remaining undetected and invisible.
Originally Posted: 2003/04/15
Terminal Escape Code Zen
An image and technicacl achievement so profound, it will touch yoour heart.. So 3D... it'll hurt you eyes! LOL.. lol.. Man I am cracking up here. haha Ha definately the best intro ever, those really do look 3D for terminal though huh.. Sweet. Here is the little function I wrote to output that grey marble.
Hacking VLAN switched networks
There isn't much vlan info on the net in terms of specifics and I had to learn all about it because I needed to log in to a switch that was on a different vlan. With the help of the Ettercap developers NaGA and ALoR I figured it out.
Originally Posted: 3/30/2004
SUDO – sudoers Config File
Libcurl Error Codes
DNS Tracer
Custom Boot Menu in Windows XP
One of the first things that I do upon receiving a new Windows computer is immediately create a poweruser-style customized boot menu. Then every time I boot I can choose Safe Mode, Recovery Console, Debug, whatever I want! It's quick and easy to set-up and everyone should have one, soo sweet!
.htaccess – Wikipedia
COMPUTER SECURITY TOOLBOX
List of mainly obscure security software geared more for the master pentester. These are mostly for unix, bsd, and mac and many are difficult to install and setup (require custom servers, inside access points, obscure libraries). Only programs that output data are included, so no actual exploits or anything. Most of these output extremely useful albeit extremely technical information.THE Ultimate Htaccess
.htaccess is a very ancient configuration file for web servers, and is one of the most powerful configuration files most webmasters will ever come across. This htaccess guide shows off the very best of the best htaccess tricks and code snippets from hackers and server administrators.
You've come to the right place if you are looking to acquire mad skills for using .htaccess files!
Mod_Status tricks to View Apache Module Directives
Quick and easy method to get a list of all Apache Modules currently loaded, a list of all the directives each module provides, a list of currently used directives, etc... These directives can be used in httpd.conf and/or .htaccess files so it is definately useful to know which ones are available and which ones are currently being used.
SPF Records on DreamHost
Here are the steps that I take to get an SPF Record going on DreamHost
v=spf1 mx ip4:64.111.100.0/24 ip4:66.33.201.0/24 ip4:66.33.216.0/24 ip4:208.97.1 32.0/24 ip4:208.97.187.0/24 ip4:208.113.200.0/24 ip4:208.113.244.0/24 ip4:64.18.0.0/20 ip4:74.125.148.0/22 include:aspmx.googlemail.com include:_spf.google.com ~all
Apache Directives and Modules on DreamHost
Apache .htaccess Directives and Loaded Modules allowed on DreamHost Apache Server 2 Setups.
Better, Faster, Stronger gethostbyaddr
Running a Reverse Proxy in Apache
Optimizing Servers and Processes for Speed with ionice, nice, ulimit
To prepare for several upcoming articles on AskApache that are focused on optimizing Servers and Sites from a server admin level, here is an article to introduce the main tools that we will be using. These tools are used to optimize CPU time for each process using nice and renice, and other tools like ionice are used to optimize the Disk IO, or Disk speed / Disk traffic for each process. Then you can make sure your mysqld and httpd processes are always fast and prioritized.
Htaccess SetEnvIf and SetEnvIfNoCase Examples
SetEnv, SetEnvIf, and SetEnvIfNoCase directives conditionally set environment variables accessible by scripts and apache based on HTTP Headers, Variables, and Request information.
Apache 2.4 and PHP-FPM
IP Abuse Detection for DreamHost
Scan Apache logs for IP address that are probably evil, then generates an .htaccess file to DENY them all.
IP Blocked by stateful Firewall, now what?
Apache Authentication in htaccess
How to password-protect, Allow or Deny a visitor based on a condition. If you are having trouble getting htaccess-based password protection to work see: Troubleshooting htaccess Authentication: Getting it to work
SSI in Htaccess for ErrorDocuments, DirectoryIndexing, SEO
3-Part article covering practical implementation of 3 advanced .htaccess features. Discover an easy way to boost your SEO the AskApache way (focus on visitors), a tip you might keep and use for life. Get some cool security tricks to use against spammers, crackers, and other nefarious sorts. Take your site's error handling to the next level, enhanced ErrorDocuments that go beyond 404's.
If you can crash your daemon, you likely have a security problem
Tons of awesome tips and tricks using netcat. Port redirector, nessus wrapper, capture exploits being sent by vuln scanners, etc. This is very useful for doing stuff like redirecting traffic through your firewall out to other places like web servers and mail hubs, while posing no risk to the firewall machine itself.
Want to know how to really hack?
An interesting post by hacker explaining how to really hack, stay anonymous, and dig in deep.Originally Posted: 1/22/2003
Magic in the Terminal: Screen, Bash, and SSH
Oh ya lets get it on! short but sweet
HOWTO: Uninstall CPANEL over SSH
The following is just a quick but detailed reference of some of the commands I used to successfully uninstall cpanel permanently. This is for advanced users of the shell. If you run a single one of these commands without fully understanding it, you will probably kill your server, lose everything on it permanently, not have a website or email for weeks.. So backup everything. FIRST. You should also contact your hosting provider support - but be prepared for some MAJOR negativity.. cpanel makes things very easy for web-hosting companies, and you are less than a drop in their bucket.
Advanced WordPress wp-config.php Tweaks
The bottom line for this article is that I want to make WordPress as fast, secure, and easy to install, run, and manage because I am using it more and more for client production sites, I will work for days in order to solve an issue so that I never have to spend time on that issue again. Time is money in this industry and that is ultimately (time) what there is to gain by tweaking WordPress.
Note: I spent no time on readability, this is primarily a read the code and figure it out article.. This is for advanced users looking for a reference or discussion and for those of you looking to advance. Feedback would be great if you make it that far..
Privacy Policy and Terms of Use
Mod_Security .htaccess tricks
Mod_Security rivals Mod_Rewrite in the amount of features it provides. I decided to go ahead and post what I learned about it today, even though its tough to give away such awesome htaccess and apache tricks.. Learn how to control spam once and for all, conditionally log/deny/allow/redirect requests based on IP, username, etc.. Mod_Security is so fine!
Renaming Sponsored Links in AdSense
Google AdSense calles their AdSense Ads, "Sponsored Links", while Text-Link-Ads.com recommends "Sponsored By". Of course it is against the Google Adsense TOS to rename your ads, but in general, for non-adsense, what do you like to call your sponsored links?
Free DNS Services
Links to htaccess tutorials and articles
Links to htaccess tutorials and howtos in the htaccess forum