AskApache

Htaccess Mod_Rewrite – Crazy Advanced Master Class

AskApache — Tue, 03 Mar 2026 18:55:32 +0000

htaccess rewrite Master Class! If you understand the basics of mod_rewrite, or if you literally write the mod_rewite.c code, this article will transform your thinking. The transformation is profound. Deeply effective. Culmination of the best of the best mod_rewrite tricks for understanding and learning exactly what rewrite is doing.

The post Htaccess Mod_Rewrite – Crazy Advanced Master Class appeared first on AskApache.

Chmod, Umask, Stat, Fileperms, and File Permissions

AskApache — Tue, 17 Feb 2026 11:16:56 +0000

Unix file permissions are one of the more difficult subjects to grasp.. Well, ok maybe "grasp" isn't the word.. Master is the right word.. Unix file permissions is a hard topic to fully master, mainly I think because there aren't many instances when a computer user encounters them seriously, and bitwise is oldschool. This contains a listing of all possible permission masks and bits from a linux, php, and web hosting view.... cuz you guys AskApache Regs Rock!

The post Chmod, Umask, Stat, Fileperms, and File Permissions appeared first on AskApache.

PHP fsockopen for FAST DNS lookups over UDP

AskApache — Wed, 28 Jan 2026 18:03:39 +0000

While reading up on gethostbyaddr on PHP.net, I saw a nice idea for using fsockopen to connect over UDP port 53 to any Public DNS server, like Google DNS 8.8.8.8, and sending the reverse addr lookup in oh about 100 bytes, then getting the response in oh about 150 bytes! All in less than a second. This is how/why to read/write data directly to the wire! This would be extremely valuable for use in things like my online header tool because it's faster than any other method. As usual, I went a bit overboard optimizing it to be lean and fast.

The post PHP fsockopen for FAST DNS lookups over UDP appeared first on AskApache.

Advanced Windows Batch File Scripting

AskApache — Thu, 05 Jun 2025 18:14:02 +0000

If for some reason you need to use windows .bat batch file scripting to do some task, or you just want to learn the most universal batch programming language on Windows machines, you lucked out and found the AskApache example. My expertise is the shell, in this article the shell is Windows cmd.exe. It has some pretty advanced windows shell usage, including pipes and redirection, but it's the modular linux-like coding approach that earns this script it's "advanced" title.

:SETPROMPT
set PROMPT=$_[%USERNAME%@%USERDOMAIN%]$S[$P]$_$M$G && EXIT /B

My favorite tool (and I've tried sooo many) for editing most Windows files and especially .bat files is the free and open-source Notepad++. Set that up and you will have a color-syntax-highlighted editor for Batch Scripting that works very very well.

The post Advanced Windows Batch File Scripting appeared first on AskApache.

Crazy POWERFUL Bash Prompt

AskApache — Mon, 06 Jan 2025 20:02:34 +0000

This amazing bash linux prompt does more than meets the eye. If you want to know how to become really good with technology, linux is the secret sauce behind the AskApache articles. Open Source is elixir of the web. Thanks to everyone who helped me for the past 20 years. I use linux/bsd because homey don't play, so this is geared to be as productive a prompt as I can make it.

Don't have much time.. or just don't care? Not a problem, here are the 3 lines to copy and paste - you can just paste them right in your shell to test it, or add to a startup script.

export AA_P="export PVE=\"\\033[m\\033[38;5;2m\"\$(( \`sed -n \"s/MemFree:[\\t ]\\+\\([0-9]\\+\\) kB/\\1/p\" /proc/meminfo\` / 1024 ))\"\\033[38;5;22m/\"\$((\`sed -n \"s/MemTotal:[\\t ]\\+\\([0-9]\\+\\) kB/\\1/p\" /proc/meminfo\`/ 1024 ))MB\"\\t\\033[m\\033[38;5;55m\$(< /proc/loadavg)\\033[m\";echo -en \"\""
export PROMPT_COMMAND="history -a;((\$SECONDS % 10==0 ))&&eval \"\$AA_P\";echo -en \"\$PVE\";"
export PS1="\\[\\e[m\\n\\e[1;30m\\][\$\$:\$PPID \\j:\\!\\[\\e[1;30m\\]]\\[\\e[0;36m\\] \\T \\d \\[\\e[1;30m\\][\\[\\e[1;34m\\]\\u@\\H\\[\\e[1;30m\\]:\\[\\e[0;37m\\]\${SSH_TTY} \\[\\e[0;32m\\]+\${SHLVL}\\[\\e[1;30m\\]] \\[\\e[1;37m\\]\\w\\[\\e[0;37m\\] \\n(\$SHLVL:\\!)\\\$ " && eval $AA_P

The post Crazy POWERFUL Bash Prompt appeared first on AskApache.

View Your Server Environment Variables using Htaccess Mod_Rewrite

AskApache — Wed, 04 Sep 2024 17:48:10 +0000

Get your real server info

The post View Your Server Environment Variables using Htaccess Mod_Rewrite appeared first on AskApache.

.htaccess Examples: Cookies, Variables, Custom Headers

AskApache — Sat, 03 Aug 2024 02:45:29 +0000

Fresh .htaccess code for you! Check out the Cookie Manipulation and environment variable usage with mod_rewrite! I also included a couple Mod_Security .htaccess examples. Enjoy!

Originally Posted: 3/29/2008

The post .htaccess Examples: Cookies, Variables, Custom Headers appeared first on AskApache.

Hacking VLAN switched networks

AskApache — Fri, 02 Aug 2024 06:27:11 +0000

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

The post Hacking VLAN switched networks appeared first on AskApache.

Apache Compression, Vary, mod_deflate

AskApache — Sat, 23 Apr 2022 01:49:47 +0000

The post Apache Compression, Vary, mod_deflate appeared first on AskApache.

Respond with 200 OK for 404 Not Found

AskApache — Thu, 14 Apr 2022 20:36:54 +0000

What if you'd like to send a 200 OK response instead of the default 404 Not Found response using Apache .htaccess files or httpd.conf? One use would be to make sure upstream caches cache any request on an api server, as 404's are not cached.

The post Respond with 200 OK for 404 Not Found appeared first on AskApache.

Libcurl Error Codes

AskApache — Fri, 30 Apr 2021 06:37:16 +0000

The post Libcurl Error Codes appeared first on AskApache.

Google Trends for SEO / Apache Htaccess

AskApache — Fri, 30 Apr 2021 06:26:25 +0000

.htaccess Topic vs htaccess Keyword

The post Google Trends for SEO / Apache Htaccess appeared first on AskApache.

ListOfErrors

AskApache — Sat, 16 May 2020 07:51:36 +0000

The post ListOfErrors appeared first on AskApache.

Apache 2.4 and PHP-FPM

AskApache — Sat, 16 May 2020 07:49:23 +0000

The post Apache 2.4 and PHP-FPM appeared first on AskApache.

GRUB_INIT_TUNE – Play sound through pcspkr

AskApache — Sat, 04 Apr 2020 04:34:45 +0000

Play a tune directly on your pcspeaker right before the grub boot manager loads.

The post GRUB_INIT_TUNE – Play sound through pcspkr appeared first on AskApache.

MariaDB with LZ4 Compression Howto for CentOS

AskApache — Fri, 24 Jan 2020 19:13:00 +0000

I really really wanted to run the latest MariaDB with LZ4 Page Compression.. it is a game changer for many types of large databases I deal with. So I compiled it manually in a way that is repeatable and follows best-practices and it's now powering this site. Now I can use InnoDB Page Compression with lzo, lzma, bzip2, snappy, or my favorite algorithm: LZ4.

Thought this would be a good chance to post a howto, and show that there is a lot you can do by compiling software yourself and breaking the package management one-click install shackles.

The post MariaDB with LZ4 Compression Howto for CentOS appeared first on AskApache.

Serving WebP images for PNG and JPG files

AskApache — Thu, 31 Oct 2019 00:44:00 +0000

One of the biggest speed bottlenecks of sites today are images, specifically unoptimized images or large scaled images. With Apaches Rewrite module we can convert all existing jpegs and png files (and most gifs) to webp, then transparently rewrite them so that a request for img.png from a browser that supports webp will receive img.webp.

The post Serving WebP images for PNG and JPG files appeared first on AskApache.

Internet Census 2012 – Port scanning using insecure embedded devices – Carna Botnet

AskApache — Mon, 22 Jul 2019 05:41:30 +0000

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.

The post Internet Census 2012 – Port scanning using insecure embedded devices – Carna Botnet appeared first on AskApache.

Advanced WordPress wp-config.php Tweaks

AskApache — Sat, 03 Mar 2018 08:23:37 +0000

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..

The post Advanced WordPress wp-config.php Tweaks appeared first on AskApache.

WordPress .htaccess in-depth

AskApache — Fri, 05 Jan 2018 03:42:34 +0000

WordPress uses a file named .htaccess to rewrite all requests to the main index.php file. This article explains what the htaccess file rules look like and what they actually do.

The post WordPress .htaccess in-depth appeared first on AskApache.