Some quick notes about base64 encoding. URL safe and avoiding a pitfall when using Burp Decoder.

This document assumes you already know what base64 is and some of the major use-cases.

I have moved from Atom to Sublime. Atom is a nice editor with a lot of features but it has a lot of performance issues for what I want to do.

Below is my setup for reference. When I want to do it again in a year (or a new machine) I can just use everything here or just use the config files. You can find a repo with the config files here: https://github.com/parsiya/sublime-config

In order to create our own custom proxies, first we need to know how proxies work. When I wanted to write a custom proxy tool (it’s a simple Python script) in Hipchat part3, I had to go back and learn how they work. I did not find such a resource online that looked at proxies from an infosec perspective. Most talked about how to configure caching or forwarding proxies and not much about MitM ones. I have briefly talked about it in the section 2 of the same post named How does a Proxy Work?. In this post I am going to take a deep(er) dive. I actually read some RFCs and they were surprisingly well written.

If you want to skip the intro, go to section 3.

Back in March 2014, Garage4Hackers had a live stream with Gynvael Coldwind. His talk was named "Data, data, data! I can't make bricks without clay" or a few practical notes on reverse-engineering. You can see the recording on youtube.

Here are my notes that I discovered from 2014.

I thought I had found the Windows iptables with Portproxy but I was wrong. But I learned something neat in the process and I am documenting it to access it when I need it.

Portproxy allows you to listen on a certain port on one of your network interfaces (or all interfaces) and redirect all traffic to that interface (on your computer) to another port/IP address.

The to that interface is the limitation that unfortunately kills it. This will be a short post.

I have decided to learn Go (or Golang). I went through the Tour of Go and made some notes. Some of the items/code are directly copy pasted from there. The notes are just a cheatsheet to help me look things up quickly while learning. I will update that page as I learn more.

You can see the notes at https://parsiya.net/go/.