How to inspect the certificate of a mail server over a CLI
A tiny guide to using the openssl CLI tool to inspect and/or save the SSL.TLS certificates used by mail servers
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Demystifying DMARC: A guide to preventing email spoofing
Learn how the SPF, DKIM, DMARC email authentication standards work together to prevent unauthorized email spoofing — and how to use open source tools to deploy DMARC for free
How to compile and install FFmpeg on Debian/Ubuntu
A guide to building and installing FFmpeg 4,0 from source as a custom Debian package on Debian/Ubuntu systems, without conflicting with downstream dependencies
Stop the ADA Education and Reform Act
The ADA Education and Reform Act of 2017 allows business to ignore ADA requirements until a notification is sent by a disabled person, and denies persons with disabilities their right to due proces...
Lessons Learned from the US Federal Government's Ongoing Deployment of SPF and DMARC
An explanation of SPF and DMARC best practices, using results from checkdmarc scans of US Government domains as a case study, as federal agencies work towards fully implementing the cyber hygiene a...
How to install YARA and write basic YARA rules to identify malware
A complete YARA guide, covering installation, practical examples for writing YARA rules, and using YARA to identify, sort, and collect malware samples
How to run graphical Linux applications on Windows 10 using the Windows Subsystem for Linux (WSL) 1.0
A step-by-step guide on installing Bash on Ubuntu on Windows, with additional steps for running graphical Linux applications.
WannaCry ransomware analysis: Samples date back to at least early February 2017
Information on the spread, mitigation, and patch details of WannaCry, The ransomware that has shut down organizations around the world.
Google Pixel phones can be unlocked with a recording of a trusted voice by default
Trusted Voice is enabled on Google Pixel phones by default, allowing anyone with a recording of you saying "Ok Google" to unlock your phone.
Android 7.1 adds native android visual voicemail support for Verizon
No more cryptic text messages when getting Verizon voicemails on Nexus devices. Android 7.1 adds support for Verizon visual voicemail in the native dialer.