Ishan Marikar ishan-marikar

How To Run OpenVPN in a Docker Container

Introduction

This tutorial will explain how to setup and run an OpenVPN container with the help of Docker.

OpenVPN provides a way to create virtual private networks (VPNs) using TLS (evolution of SSL) encryption. OpenVPN protects the network traffic from eavesdropping and man-in-the-middle (MITM) attacks. The private network can be used to securely connect a device, such as a laptop or mobile phone running on an insecure WiFi network, to a remote server that then relays the traffic to the Internet. Private networks can also be used to securely connect devices to each other over the Internet.

Docker provides a way to encapsulate the OpenVPN server process and configuration data so that it is more easily managed. The Docker OpenVPN image is prebuilt and includes all of the necessary dependencies to run the server in a sane and stable environment. Scripts are included to significantly autom

Getting Started with NPM (as a developer)

If you haven't already set your NPM author info, now you should:

npm set init.author.name "Your Name"
npm set init.author.email "you@example.com"
npm set init.author.url "http://yourblog.com"

npm adduser

How to setup Let's Encrypt for Nginx on Ubuntu 16.04 (including IPv6, HTTP/2 and A+ SLL rating)

There are two modes when you don't want Certbot to edit your configuration:

Standalone: replaces the webserver to respond to ACME challenges
Webroot: needs your webserver to serve challenges from a known folder.

Webroot is better because it doesn't need to replace Nginx (to bind to port 80) to renew certificates.

In the following, we're setting up mydomain.com to be served from /var/www/mydomain, and challenges will be served from /var/www/letsencrypt.

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

query
mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.

	var http = require('http')
	var fork = require('child_process').fork;

	function fib(n) {
	if (n < 2) {
	return 1;
	} else {
	return fib(n - 2) + fib(n - 1);
	}
	}

	// Place in your body:
	// <div id="image"></div>

	$(document).ready( function() {

	var subreddit = 'VillagePorn'; // Your Subreddit without /r/
	var aRandomNum = Math.floor((Math.random() * 25) + 1); // A random number - range 25

	$.getJSON('http://www.reddit.com/r/'+subreddit+'.json?jsonp=?&show=all&limit=25', function(data) {
	$.each(data.data.children, function(i,item){

	function match(where, what) {
	return where.toString().match(what);
	}

	var arr = ['duck', 'blue', 'thats right man'];

	match('duck', arr); // null
	match(arr, 'duck'); // ["duck"]
	match(arr, 'fuck'); // null
	match(arr, 'man'); // ["man"]

	# Ask for the user password
	# Script only works if sudo caches the password for a few minutes
	sudo true

	# Install kernel extra's to enable docker aufs support
	# sudo apt-get -y install linux-image-extra-$(uname -r)

	# Add Docker PPA and install latest version
	# sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
	# sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

	#!/bin/bash

	# vars
	[ -z "$NUM_WORKERS" ] && NUM_WORKERS=3

	# init swarm (need for service command); if not created
	docker node ls 2> /dev/null \| grep "Leader"
	if [ $? -ne 0 ]; then
	docker swarm init > /dev/null 2>&1
	fi

	var express = require('express');
	var app = require('express')();
	var http = require('http').Server(app);
	var io = require('socket.io')(http);

	var scanner = io.of('/scanner');

	scanner.on('connection', function(socket) {

	console.log('Scanner Connected');