tonic tonicmuroq

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.

	package main

	import (
	git "github.com/libgit2/git2go"
	"log"
	)

	func credentialsCallback(url string, username string, allowedTypes git.CredType) (git.ErrorCode, *git.Cred) {
	ret, cred := git.NewCredSshKey("git", "/home/vagrant/.ssh/id_rsa.pub", "/home/vagrant/.ssh/id_rsa", "")
	return git.ErrorCode(ret), &cred

	#! /usr/bin/python
	# -- coding: utf-8 --

	# (The MIT License)
	#
	# Copyright © 2009 John Tantalo
	#
	# Permission is hereby granted, free of charge, to any person obtaining a copy of
	# this software and associated documentation files (the ‘Software’), to deal in
	# the Software without restriction, including without limitation the rights to

	# coding: utf-8

	import random
	import requests
	import multiprocessing

	def request_once():
	randint = random.randint(1, 10000)
	url = 'http://localhost:8000?value=%s' % randint
	r = requests.get(url)

	package main

	import (
	"database/sql"
	_ "github.com/go-sql-driver/mysql"
	"io/ioutil"
	"strings"
	)

	func main() {

	from flask import Flask

	from raven.contrib.flask import Sentry

	app = Flask(__name__)
	sentry = Sentry(dsn='')
	sentry.init_app(app)


	@app.route('/')

	net.ipv4.ip_forward = 1
	net.ipv4.conf.default.rp_filter = 1
	net.ipv4.conf.default.accept_source_route = 0
	kernel.sysrq = 0
	kernel.core_uses_pid = 1
	net.ipv4.tcp_syncookies = 1
	kernel.msgmnb = 65536
	kernel.msgmax = 65536
	kernel.shmmax = 68719476736
	kernel.shmall = 4294967296

	2014/12/25 15:17:08 [error] 21798#0: *1962274 connect() failed (110: Connection timed out) while connecting to upstream, client: 10.1.201.16, server: ipservice.intra.hunantv.com, request: "GET /exec?ip=116.186.128.2 HTTP/1.0", upstream: "http://10.1.201.46:80/exec?ip=116.186.128.2", host: "ipservice.intra.hunantv.com"
	2014/12/25 15:17:08 [error] 21792#0: *1962290 connect() failed (110: Connection timed out) while connecting to upstream, client: 10.1.201.16, server: ipservice.intra.hunantv.com, request: "GET /exec?ip=116.186.128.2 HTTP/1.0", upstream: "http://10.1.201.46:80/exec?ip=116.186.128.2", host: "ipservice.intra.hunantv.com"
	2014/12/25 15:17:08 [error] 21792#0: *1962289 connect() failed (110: Connection timed out) while connecting to upstream, client: 10.1.201.16, server: ipservice.intra.hunantv.com, request: "GET /exec?ip=116.186.128.2 HTTP/1.0", upstream: "http://10.1.201.46:80/exec?ip=116.186.128.2", host: "ipservice.intra.hunantv.com"
	2014/12/25 15:17:08 [error] 21798#0: *1962275 connect() failed (

	user nginx;
	worker_processes 24;

	error_log /mnt/mfs/logs/nbe/master/error-kili10.log warn;
	pid /var/run/nginx.pid;

	events {
	worker_connections 102400;
	}

	syntax on
	filetype off

	" format and user interface
	set nocompatible
	set number
	set softtabstop=4 tabstop=4 shiftwidth=4
	set expandtab
	set autoindent
	set incsearch