yegorg

function video_to_gif {
  local input_video_path="$1"
  local output_gif_path="$2"
  local fps="${3:-10}"
  local scale="${4:-1080}"
  local loop="${5:-0}"

  ffmpeg -i "${input_video_path}" -vf "setpts=PTS/1,fps=${fps},scale=${scale}:-2:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop $loop "${output_gif_path}"
}

yegorg

Homebrew

How To

Homebrew is a package management system for OS X. You can read more about it here, or simply run

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

to install it.

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##Domain

We need some records on our domain (mydomain.com) DNS for connections. Add these records:

t1              IN      NS      t1ns.mydomain.com. ; note final the dot!
t1ns            IN      A       OUR_SERVER_IP

##Server

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#!/usr/bin/env python
"""
Synchronise block devices over the network
 
Copyright 2006-2008 Justin Azoff <justin@bouncybouncy.net>
Copyright 2011 Robert Coup <robert@coup.net.nz>
License: GPL
 
Getting started:
 

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#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#

#kernel.domainname = example.com

# Uncomment the following to stop low-level messages on console
#kernel.printk = 3 4 1 3

yegorg

Preconditions

• You need to have TUN/TAP enabled

Install dependencies

$ apt-get install -y openvpn easy-rsa

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Building Secure Networks with Vyatta

What is Vyatta, and why do you want to use it?

• Discussion of key strenths of vyatta, and firewalls in general
• Link to the open-source VyOS version and the commercial Vyatta project
• Talk about Softlayer choices specifically -- why softlayer version is insecure / finnicky with SSL & PPTP options, limitations & cost of the Fortigate appliance

Splitting your public and private traffic

yegorg

Static OpenVPN configuration between a single pair of hosts

So you've got two boxes, separated by some kind of network that you're not in control of, and you'd like to encrypt traffic between them. You're not going to have multiple clients connecting to each other, just these two boxes.

As of OpenVPN 2, it's possible to configure the hosts in peer-to-peer mode, with static keying, meaning that the actual VPN setup is super easy:

1. Install OpenVPN (>=2) on both boxes, the standard Wheezy version is fine.
2. Generate a static key as follows: openvpn --genkey --secret /path/to/somewhere/secret.key
3. Copy the secret key to both boxes over a secure channel (e.g SSH)
4. Create /etc/openvpn/p2p.conf on both boxes as show in box1.vpn.cnf and box2.vpn.cnf below

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$modload imtcp
$InputTCPServerRun 10514

# $ActionQueueType LinkedList   # use asynchronous processing
# $ActionQueueFileName srvrfwd  # set file name, also enables disk mode
# $ActionResumeRetryCount -1    # infinite retries on insert failure
# $ActionQueueSaveOnShutdown on # save in-memory data if rsyslog shuts down
# *.notice			@@logserver.local:10514

auth,authpriv.*			-/var/log/auth.log

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{
  "title": "Collectd: Blackbox",
  "services": {
	"query": {
	  "list": {
		"0": {
		  "query": "plugin:\"load\"",
		  "alias": "Load",
		  "color": "#7EB26D",
		  "id": 0,