I work as a security engineer for an S&P 500 company, pentesting and auditing. I maintain some Linux embedded systems for my own test lab and a few hobby projects.

Security

• 04 Jul 2019 » IOT Regulations and Guidelines
• 07 Feb 2019 » Enumerating SSH Algorithms with Nmap
• 02 Feb 2019 » SSH Hostkey Fingerprints
• 27 Jan 2019 » Using Nmap to check certs and supported TLS algorithms
• 08 Dec 2018 » Signing code with OpenSSL
• 21 Nov 2018 » Running Snort on OpenBSD

ARM Shellcode

• 21 Dec 2018 » Linux ARM Shellcode - Part 0 - Credits and References
• 19 Dec 2018 » Linux ARM Shellcode - Part 3 - Bind and Reverse Shells
• 19 Dec 2018 » Linux ARM Shellcode - Part 8 - Exploiting the Stack
• 19 Dec 2018 » Linux ARM Shellcode - Part 7 - Corrupting the Stack
• 19 Dec 2018 » Linux ARM Shellcode - Part 6 - Randomized Address Space
• 19 Dec 2018 » Linux ARM Shellcode - Part 5 - Functions and the Stack
• 19 Dec 2018 » Linux ARM Shellcode - Part 4 - The Stack
• 19 Dec 2018 » Linux ARM Shellcode - Part 2 - Removing NULLs
• 19 Dec 2018 » Linux ARM Shellcode - Part 1 - Syscalls

Embedded Linux

• 08 Dec 2018 » Speeding up initialization of the Linux RNG
• 23 Jul 2018 » An upgrade strategy for embedded Linux systems
• 12 Nov 2017 » Choosing an embedded Linux build system

Raspberry Pi

• 28 Jun 2019 » Building Raspberry Pi Systems with Yocto
• 18 May 2019 » Using ADS1115 ADCs with Raspberry Pis
• 17 Aug 2018 » Analyzing SPI driver performance on the Raspberry Pi
• 15 Mar 2018 » Building Raspberry Pi Systems with Buildroot
• 24 Apr 2017 » Using DS18B20 1-wire Temp Sensors with the Raspberry Pi
• 16 Apr 2017 » Raspberry Pi TFT Displays and Qt5
• 10 Apr 2017 » Using Qt Creator to cross-compile and debug Raspberry Pi Qt5 apps
• 10 Apr 2017 » Working with the Gumstix Pi Compute Dev Board
• 10 Apr 2017 » Working with the Raspberry Pi Compute Board
• 09 Apr 2017 » Using the Raspberry Pi hardware PWM timers
• 16 Feb 2017 » Running Qt5 Apps Over VNC Works Again
• 31 Jan 2017 » Using MCP3008 ADCs with Raspberry Pis
• 23 Jan 2017 » Compiling Raspberry Pi Overlays with Buildroot
• 09 Jan 2017 » Enabling Qt5 WebEngine in Yocto Builds
• 02 Jan 2017 » Qt5 and QML Development with the Raspberry Pi
• 26 Dec 2016 » Raspberry Pi 3 AdHoc Wifi Network
• 20 Sep 2016 » Working with pi-blaster for PWM on the RPi
• 20 Mar 2016 » Raspberry Pi Serial Console
• 22 Jan 2016 » A Raspberry Pi Pandora music player

BeagleBone

• 10 Jul 2019 » Building BeagleBone Systems with Yocto
• 08 Jan 2018 » Adding Mender to a BeagleBone System
• 22 Dec 2017 » Building Beaglebone Systems with Buildroot
• 10 Mar 2017 » Working with the Beaglebone Black PRU using UIO
• 18 Jun 2016 » Working on the BeagleBone Kernel
• 22 Jan 2016 » BeagleBone Black pinmuxing and other device tree notes
• 23 Oct 2015 » BeagleBone Black U-Boot

Odroid

• 10 Jul 2019 » Building Odroid-C2 Systems with Yocto
• 04 Feb 2018 » Adding Mender to an Odroid-C2 System

Wandboard

• 10 Jul 2019 » Building Wandboard Systems with Yocto
• 07 Jan 2018 » Adding Mender to a Wandboard System
• 27 Dec 2017 » Building Wandboard Systems with Buildroot

Gumstix - Linux

• 10 Jul 2019 » Building Duovero Systems with Yocto
• 07 Jan 2018 » Adding Mender to a Duovero System
• 13 Mar 2017 » Duovero Real-time Clock
• 23 May 2016 » Building Overo Systems with Yocto
• 25 Jun 2015 » Duovero Access Point
• 05 Sep 2014 » Overo Kernel Development - Simple patching
• 02 Sep 2014 » Setting the Overo Ethernet MAC
• 25 Feb 2014 » Erasing the Overo U-Boot Environment
• 14 Jan 2014 » Optimizing GStreamer ffmpegcolorspace for Gumstix webcams

Yocto

• 02 Sep 2016 » Qt5 Errors on Exit using QPA
• 17 Feb 2016 » Miscellaneous Yocto Notes
• 20 Oct 2014 » Adding Go language support to a Yocto build
• 25 Jul 2014 » Managing a custom opkg repository
• 24 Jul 2014 » Using a Yocto build workstation as a remote opkg repository
• 02 Apr 2014 » Adding Fortran support to a Yocto build
• 24 Feb 2014 » Using private Github repos with Yocto

Miscellaneous

• 29 May 2018 » Working with a Mender CLI
• 12 Jul 2017 » Using private git repositories with Google Repo

Gumstix - FreeBSD

• 11 Jan 2015 » FreeBSD Duovero Common DTS for OMAP4
• 02 Dec 2014 » FreeBSD Duovero Kernel Development
• 24 Nov 2014 » FreeBSD Duovero build workstation setup
• 23 Nov 2014 » FreeBSD Duovero GPIO
• 18 Nov 2014 » FreeBSD Duovero I2C - Changing bus speeds
• 13 Nov 2014 » FreeBSD Duovero I2C
• 11 Nov 2014 » FreeBSD Duovero USB Wireless
• 09 Nov 2014 » FreeBSD Duovero Serial Ports
• 05 Nov 2014 » More FreeBSD on the Gumstix Duovero
• 05 Nov 2014 » FreeBSD on the Gumstix Duovero

General FreeBSD

• 30 Sep 2014 » FreeBSD on ARM