kfox

var fs  = require('fs'),
    tls = require('tls');

var host = process.argv[2] || '3.0.0.2';
var port = process.argv[3] || 443;

var options = {
  key: fs.readFileSync('./certs/serverA_512.key'),
  cert: fs.readFileSync('./certs/serverA_512.crt'),
  ca: [

kfox

# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled.  See sysctl(8) and
# sysctl.conf(5) for more details.

# Controls source route verification
net.ipv4.conf.default.rp_filter = 1

# Do not accept source routing
net.ipv4.conf.default.accept_source_route = 0

kfox

var http    = require('http'),
    cluster = require('cluster');

var numCPUs = require('os').cpus().length;

var host = process.argv[2] || '3.0.0.2';
var port = process.argv[3] || 80;

if (cluster.isMaster) {
  // this is the master, so spawn workers

kfox

var net = require("net");

process.on("uncaughtException", function(error) {
  console.error(error);
});

if (process.argv.length != 5) {
  console.log("usage: %s <localport> <remotehost> <remoteport>", process.argv[1]);
  process.exit();
}

kfox

var dgram = require('dgram');

var host = process.argv[2] || '0.0.0.0';
var port = process.argv[3] || 514;
var server = dgram.createSocket('udp4');

server.on('message', function(msg, rinfo) {
  console.log("received: %s from %s:%s", msg, rinfo.address, rinfo.port);
});

kfox

# to run:
# 1. npm install -g coffee-script
# 2. npm install http-proxy
# 3. coffee kittenproxy.coffee
# 4. change browser proxy settings to <thishost>:8080

httpProxy = require("http-proxy")

address   = process.argv[2] or "0.0.0.0"
port      = process.argv[3] or 8080

kfox

# forget.sh: remove matching lines from ~/.ssh/known_hosts
# usage: forget <hostname|IP|substring> [...]

function forget {
  known_hosts=~/.ssh/known_hosts
  for host in $*
  do
    host=$(echo "${host}" | sed -e 's/^ssh:\/\///' -e 's/^.*@//')
    line=$(awk '{ print $1 }' ${known_hosts} | grep -n "${host}" | sed 's/:.*$//g' | xargs)
    while [ -n "${line}" ]

kfox

var http = require('http');

var host = process.argv[2] || '127.0.0.1';
var port = process.argv[3] || 8080;

http.createServer( function (req, res) {

  var proxy = http.request(req.url, function (proxy_res) {

    proxy_res.on('data', function (chunk) {

kfox

#!/usr/bin/env ruby

# usage: saveimages.rb <url>
# locally save all images from a web site

require 'nokogiri'
require 'open-uri'

exit if ARGV[0].nil?

kfox

#!/usr/bin/env ruby

numbers = [2, 6, 4, 8, 8, 9]
sum     = ARGV.empty? ? 10 : ARGV.first.to_i

def sum_exists(numbers, sum)
  Array(numbers).combination(2).find_all { |x, y| x + y == sum } || []
end

result = sum_exists(numbers, sum)