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IP Tables (iptables) Cheat Sheet

IPTables is the Firewall service that is available in a lot of different Linux Distributions. While modifiying it might seem daunting at first, this Cheat Sheet should be able to show you just how easy it is to use and how quickly you can be on your way mucking around with your firewall.

Resources

The following list is a great set of documentation for iptables. I used them to compile this documentation.

How-To Geek: The Beginner’s Guide to iptables, the Linux Firewall: https://www.howtogeek.com/177621/the-beginners-guide-to-iptables-the-linux-firewall/
IPTables Essentials: Common Firewall Rules and COmmands https://www.digitalocean.com/community/tutorials/iptables-essentials-common-firewall-rules-and-commands

Create a Wi-Fi hotspot on Linux using `nmcli`

Original post : https://unix.stackexchange.com/a/310699

nmcli con add type wifi ifname wlan0 con-name Hostspot autoconnect yes ssid Hostspot
nmcli con modify Hostspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
nmcli con modify Hostspot wifi-sec.key-mgmt wpa-psk
nmcli con modify Hostspot wifi-sec.psk "veryveryhardpassword1234"

Kali Linux Bootable USB with Persistence and Wireless on OSX

Download the appropriate Kali Linux .iso

Download site: https://www.kali.org/downloads/

I used a 64 bit .iso image, downloaded via HTTP. I downloaded the amd64 weekly version, as the pool linux headers (needed below for installation of wireless drivers) were ahead of the stable release kernel.

Download the SHA256SUMS and SHA256SUMS.gpg files from the same location.

1. Download Xcode from https://developer.apple.com/download/more/ (this requeires to Login in with an Apple Developer Account)

At the moment id don´t know how to authenticate so i have no clue to download the xip via curl/wget.
In my case i downloaded the file and copied it via scp to my mac.

eg. for Xcode 9.2 https://developer.apple.com/services-account/download?path=/Developer_Tools/Xcode_9.2/Xcode_9.2.xip

2. Verify Signature of xip file

pkgutil --verbose --check-signature path/to/xip

	from subprocess import Popen, PIPE, STDOUT, check_output
	from mimetools import Message
	from StringIO import StringIO
	from urlparse import urlparse, parse_qs
	from urllib import quote, basejoin, urlencode

	DEV_SITE = 'https://developer.apple.com'
	AUTH_SITE = 'https://idmsa.apple.com'
	AUTH_PATH = '/IDMSWebAuth/authenticate'
	APPIDKEY_PATH = "/services-account/download?path=%s"

	from Foundation import NSBundle
	import objc, array

	# from CoreFoundation import CFGetTypeID
	Security = NSBundle.bundleWithPath_('/System/Library/Frameworks/Security.framework')

	# First we need the CF TypeIDs to build some signatures
	functions = [
	('SecKeychainGetTypeID', 'I'),
	]

	# coding: utf-8

	import json
	import re

	import human_curl as hurl

	try:
	from urllib.parse import urlencode, urljoin
	except ImportError:

	#!/bin/bash
	set -xeuo pipefail
	IFS=$'\n\t'

	PREFIX="${1:-/usr/local/dvisvgm}"
	TEX="$(kpsewhich -var SELFAUTOLOC)"

	echo "$PREFIX, $TEX"

	brew install automake freetype ghostscript potrace

	var uploadButton = $('<input type="file">');
	uploadButton.change(function() {
	var reader = new FileReader();
	reader.onload = function (e) {
	var target = e.target;
	var data = JSON.parse(target.result);
	console.log(data);
	}
	reader.readAsText(uploadButton[0].files[0]);
	});