Following on from my previous post. Here is how setup the router to have a VPN server, allowing Roadwarriors to connect to the local network and access local resources. https://wiki.mikrotik.com/wiki/Manual:Interface/L2TP#Basic_L2TP.2FIpSec_setup I used this link as a guide and: https://wiki.mikrotik.com/wiki/Manual:Interface/L2TP#Connecting_Remote_Client For a bit of background, here is how you set it up on Linux, https://wordpress.com/post/adriangin.wordpress.com/979 You… Read More RouterOS L2TP/IPSec Setup

A while ago, I had a go at setting up a router using Linux. I used a Rock64 with a USB3 Gigabit NIC along with it’s built in Gigabit NIC. While it worked quite well for several months, the hardware was not quite up to the level of performance I would expect or would use… Read More RouterOS Setup for Internet and Services

If you were able to follow part 1 (https://adriangin.wordpress.com/2020/05/07/getting-started-with-docker/) read on to see how you can use Docker to setup other useful services. I personally use both Github and Gitlab, however there are times when the services go offline due to upgrade / maintenance. During these times you’re generally unable to push to your repository… Read More Getting Started with Docker Part 2

You may have heard about Docker and how it’s a “container for application / services” as well as how it’s more efficient than using Virtual Machines. Of course, all the cool web tech people have adopted it, but what about everyday normal people? Turns out docker is for everyone. The following is my journey with… Read More Getting started with Docker

To aid debugging our OS, request from JLink the RTOS SDK. They also give you an example based off their embOS. At first I had much trouble getting it to work. I find that if you use the pfLogOutf function, then you can start the GDBserver with -log option and you will see your DLL… Read More ARM Cortex RTOS: Part 3 Debugging

If you try out the example OS in the ” The Definitive Guide to ARM Cortex-M3 and Cortex-M4 Processors ” book by J. Yiu, you’ll find that some things might annoy you. These aspects did for me: SVC to start Debugging SVC Start Not really sure why many OSes do it this way. As the… Read More ARM Cortex RTOS: Part 2 C Callstacks

Here are some resources which are useful if you want to learn about developing an OS on ARM Cortex-M https://interrupt.memfault.com/blog/cortex-m-rtos-context-switching There is also a great resource for an OS called uOS++, an RTOS in C++. http://micro-os-plus.github.io/ The Joseph Yiu book on Cortex M is really good too, which comes with sample OS code. I recently… Read More ARM Cortex RTOS: Part 1

For the past 4-5 years I have been using a Focusrite 18i20 1st Gen on Windows 7. It has served me well, however I feel the drivers have let it down. Especially the latest 4.xx drivers. This isn’t a review of the 18i20, but I felt that it was time for an upgrade. What you… Read More MOTU Ultralite Mk4 Review

Create Certificates 1. Configure your webserver to host on a particular domain name. Have it hosting on port 80 and 443 and ensure that this port is forwarded by your internet facing router. Download certbot: https://certbot.eff.org/ Run as root #certbot certonly –manual Follow the on screen instructions and enter in your domain name when prompted.… Read More How to setup LetsEncrypt for Linux and lighttpd (Manual)

After reading this blog: https://github.com/foxx/foxx.github.io/blob/master/_posts/2012-10-26-access-virus-ti-firmware-reverse.markdown I decided to take it one step further and try to find out more information about the firmware. Though I’m not sure how Cal was able to extract the DSP firmware. Having extracted the firmware.bin file, we are able to obtain: vti.bin, vti2.bin and vti_snow.bin. I assume these are for… Read More Virus TI Hardware Firmware