EdgeRouter: Accept OpenVPN Connections on Multiple Ports
Since different networks frequently have different restrictions on what ports are allowed to access the internet, it’s useful to have OpenVPN listening on m...
Posts by Year
2016
Fixing 256-color Support with tmux in terminator
I use terminator for my terminal emulator. Generally everything works well, but one problem has been bothering me recently. My vim color scheme shows up fi...
Ubiquiti EdgeRouter Lite Setup Part 6: Odds and Ends
In this final post on configuring the ERL we’ll cover some miscellaneous items that don’t warrant a full post on their own. See part 1 for a list of all post...
Ubiquiti EdgeRouter Lite Setup Part 5: OpenVPN Setup
In previous posts we’ve covered everything required to set up a network with multiple VLANs and IPv6 (see part 1 for a list of all posts in this series). Tod...
Ubiquiti EdgeRouter Lite Setup Part 4: IPv6 Setup
At this point we’ve done basic setup of the ERL, configured a zone-based firewall and set up flexible network partitioning using VLANs. But we’re still only ...
Ubiquiti EdgeRouter Lite Setup Part 3: VLAN Setup
Those who have followed along with parts 1 and 2 of this series should now have an ERL configuration with one WAN and one LAN interface and a zone-based fire...
Ubiquiti EdgeRouter Lite Setup Part 2: Firewall Setup
In part 1 we covered the basics of setting up the ERL for one WAN interface and one LAN interface with a basic firewall on the WAN interface. But isolating ...
Ubiquiti EdgeRouter Lite Setup Part 1: The Basics
A few months back I picked up an Ubiquiti EdgeRouter Lite as I started the process of upgrading some of the aging network equipment in my home. So far I’m fi...
Container Mounts in Ubuntu 16.04
Something I’ve been working on for a while now is mounting select filesystems from within unprivileged (i.e. user namespace) containers. Though I’m still wor...
2012
Introduction to Creating DKMS Packages for Ubuntu, Part 2
The DKMS framework makes it easy to create and distribute an out-of-tree kernel module, as demonstrated in part 1. However, the process is rather manual (rea...
Introduction to Creating DKMS Packages for Ubuntu, Part 1
Dynamic Kernel Module Support (DKMS) is a really useful framework that allows kernel modules to be built dynamically for each kernel present on a system. The...
2011
Using ftrace to Identify the Process Calling a Kernel Function
Sometimes it’s useful to know the context from which a kernel function is being called. For instance, I recently wanted to know what process was responsible ...
Touchpad Protocol Reverse Engineering
Recently I was working on adding Linux support for some undocumented touchpad protocols, and in the process I developed some useful reverse engineering techn...