nerdalert

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.

dogrocker

ESP8266 Web Server to storing ap config to EEPROM.

Original by chriscook8 from esp8266.com I just modified to use ESP8266WebServer library for easy to handle the http request.

This is sample code not yet complete.

Todo

• when Wifi connected need to close the softAP.

tomasinouk

Some examples of SNAT, DNAT with iptables with comments

mainly used in start-up script

How to test 'safely'

When we play with iptables aka firewall we might end up in situation, where we execute rule, which has unforseen impact - lock yourself out. Recovering from this situation is necessity.

How to:

• Enable reboot via SMS.
• Test all commands in shell first before putting them into Start-up script. This way the command will be wiped out, when unit is rebooted.

masquarade all outgoing packets to be WLAN0 IP

masahirompp

/// <reference path="../tsd/tsd.d.ts" />

import mongoose = require('mongoose');
import passport = require('passport');

interface IUser extends mongoose.Document {
  provider: string;
  id: string;
  authorId: string;
  displayName: string;

whyrusleeping

package main

import (
	"bytes"
	"encoding/gob"
	"fmt"
)

type MyFace interface {
	A()

reterVision

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net"
	"os"
	"time"
)

axgle

What is sync.Pool in golang and How to use it

sync.Pool (1/2)

Many Go libraries include custom thread-safe free lists, like this:

var objPool = make(chan *Object, 10)

func obj() *Object {

select {

louismullie

#version 130
#pragma optionNV(unroll all)

uint ROTLEFT(in uint a, in int b) { return (a << b) | (a >> (32-b)); }
uint ROTRIGHT(in uint a, in int b) { return (a >> b) | (a << (32-b)); }

uint CH(in uint x,in uint y,in uint z) { return (x & y) ^ (~x & z); }
uint MAJ(in uint x,in uint y,in uint z) { return (x & y) ^ (x & z) ^ (y & z); }
uint EP0(in uint x) { return ROTRIGHT(x,2) ^ ROTRIGHT(x,13) ^ ROTRIGHT(x,22); }
uint EP1(in uint x) { return ROTRIGHT(x,6) ^ ROTRIGHT(x,11) ^ ROTRIGHT(x,25); }

alejandrolechuga

function construct(constructor, args) {
  function F() {
      return constructor.apply(this, args);
  }
  F.prototype = constructor.prototype;
  return new F();
}
// Sanboxer 
function sandboxcode(string, inject) {
  "use strict";

vishvananda

#!/bin/bash

if [ "$4" == "" ]; then
    echo "usage: $0 <local_ip> <remote_ip> <new_local_ip> <new_remote_ip>"
    echo "creates an ipsec tunnel between two machines"
    exit 1
fi

SRC="$1"; shift
DST="$1"; shift