Daniel Law iDanielLaw

Lava Lamp Random Number Generator

(extracted from the now defunct SGI project at http://lavarand.sgi.com/cgi-bin/how.cgi via the magical Internet Archive Wayback Machine)

Lava Lamps can be used as a source of randomness, which can be used to establish a random number generator. The output of the RNG can then be consumed by various computer applications.

Step 1: Establish a chaotic system

(Set up Lava Lite® lamps in a machine room.)

This example shows vxlan nat traversal, using UDP hole punching.

         +---------------+
         | (node5) vxlan |
         +---------------+
                  | uplink
       +--------------------+
       | (node4) masquerade |
 +--------------------+

Categories:

• Routing Encapsulation
• GRE
• IPIP
• Choosing a Protocol
• Setting up
• Troubleshooting

Linux NetFilter, IP Tables and Conntrack Diagrams

IPTABLES TABLES and CHAINS

IPTables has the following 4 built-in tables.

1) Filter Table

Filter is default table for iptables. So, if you don’t define you own table, you’ll be using filter table. Iptables’s filter table has the following built-in chains.

	#!/bin/bash
	# Create and sign a JWT token with ES256 given the path to an ECDSA
	# private key and a JSON payload.
	# $0 path/to/keypair.der '{"JSON": "payload"}'

	# Example keypair creation:
	# openssl ecparam -name prime256v1 -genkey -noout -outform DER > example-keypair.der

	# A few tips for generating the payload:
	# - Pipe raw strings through `jq --raw-input .` to encode them as

	config setup
	charondebug="ike 2, knl 2, cfg 2, net 2, esp 2, dmn 2, mgr 2"

	conn %default
	# keyexchange=ikev2

	conn mikrotik-1
	# Try connect on daemon start
	auto=start

	#!/bin/bash -e

	function run-vg-cmd() {
	pushd $1
	eval $2
	popd
	}

	function usage() {
	echo "Usage: $0 container from-vagrant-dir to-vagrant-dir"

	#!/bin/bash
	# This script will help you setup Docker for TLS authentication.
	# Run it passing in the arguement for the FQDN of your docker server
	#
	# For example:
	# ./create-docker-tls.sh myhost.docker.com
	#
	# The script will also create a profile.d (if it exists) entry
	# which configures your docker client to use TLS
	#

	package main

	import (
	"crypto/rand"
	"crypto/rsa"
	"crypto/tls"
	"crypto/x509"
	"crypto/x509/pkix"
	"errors"
	"log"