The most recent update to OS X El Capitan brought a very small, but very interesting change to the Firewall features included in OS X. This new feature is called “Stealth Mode” and is designed to give you significantly more protection when operating on public networks. Continue reading
This guide is going to cover using LFTP as an FTP client. The primary reason for using LFTP over something like Transmit is because it supports file segmentation. I will first give a very brief explanation of what file segmentation is, how it differs than normal transfers, and how it may help you. Continue reading
OS X Server comes with FreeRADIUS pre-installed, but does not have any GUI interface for enabling or configuring it. This guide will walk you through, step-by-step, how to enable, configure, and test your RADIUS server. I’ll probably follow up with a separate guide on configuring various devices to work with the FreeRADIUS server you will be configuring here. Continue reading
A friend recently reported a problem where he was getting update notifications from the Mac App Store (MAS) for programs he did not have installed, under an AppleID that was not his. Since these programs were not installed, he had no way to remove them, and since it was not his AppleID, he had no way to update them. As such, it seemed he was going to be stuck getting these update notifications forever. Luckily, with a little know-how and a lot of persistence, we were able to track down the cause of this and resolve it.
Given the content of this Blog, and the type of information someone on it would be looking for, I figured I would cover one lesser known vulnerability that SysAdmins often open themselves up to without thinking. This is not a high tech attack vector, but it is an easy one. This attack can occur if you copy/paste commands from a website directly into terminal. I will first show you an example of what happens, then explain how it is happening and how to protect yourself.