Timofey Vasenin tvasenin

Transparent Netflix only region unblock with Asuswrt Merlin

Ad-free time!, UnoTelly etc. services provide a nice way to unblock regions for Netflix and others using their custom DNS servers.

But I don't want to direct all my DNS traffic to them and I'm too lazy to manually configure all my devices (phones, tablets, media center boxes etc.). So here's how to transparently unblock Netflix for all your devices using the [Asuswrt Merlin][merlin] firmware. It's a custom router firmware which can be used on the Asus RT-N66U router for example.

Prerequisites

Enable JFFS partition and SSH login from http://<ROUTER-IP>/Advanced_System_Content.asp

DHT Walkthrough Notes

I've put together these notes as I read about DHT's in depth and then learned how the libtorrent implementation based on the Kademlia paper actually works.

What problem does this solve?

400,000,000,000 (400 billion stars), that's a 4 followed by 11 zeros. The number of atoms in the universe is estimated to be around 10^82. A DHT with keys of 160 bits, can have 2^160 possible numbers, which is around 10^48

Memory Leak Report

Many web apps leak memory on IE11 despite running fine on other browsers. We've identified two main causes of this.

The first kind of leak is simple, entirely predictable and caused by a quirk in how IE's JavaScript engine handles closures. Let's call it an “undead closure leak”. This leak goes away if you properly clean up all references or reload the page, and thus affects only AJAXy parts of the apps.

The second kind of leak is a complex permanent one, leaking the entire page context even if you reload the page. Let's call it a “GC singularity leak”. It's triggered by certain JavaScript code patterns, seemingly because IE's garbage collector never finishes its job (our theory is that it exhibits exponential complexity and encounters some sort of timeout/threshold).

This might not be an exhaustive list; internet posts point to other issues, notably when handling IFRAMEs, but we haven't encountered any of these.

	#!/bin/sh

	#
	# Change the commit and/or author date of git commits.
	#
	# change-date [-f] commit-to-change [branch-to-rewrite [commit-date [author-date]]]
	#
	# If -f is supplied it is passed to "git filter-branch".
	#
	# If <branch-to-rewrite> is not provided or is empty HEAD will be used.

	#
	# Working with branches
	#

	# Get the current branch name (not so useful in itself, but used in
	# other aliases)
	branch-name = "!git rev-parse --abbrev-ref HEAD"
	# Push the current branch to the remote "origin", and set it to track
	# the upstream branch
	publish = "!git push -u origin $(git branch-name)"

	#!/bin/bash
	#
	# git-mv-with-history -- move/rename file or folder, with history.
	#
	# Moving a file in git doesn't track history, so the purpose of this
	# utility is best explained from the kernel wiki:
	#
	# Git has a rename command git mv, but that is just for convenience.
	# The effect is indistinguishable from removing the file and adding another
	# with different name and the same content.

	#!/bin/bash -e
	# given a commit, find immediate children of that commit.
	for arg in "$@"; do
	for commit in $(git rev-parse $arg^0); do
	for child in $(git log --format='%H %P' --all \| grep -F " $commit" \| cut -f1 -d' '); do
	git describe $child
	done
	done
	done