Joe Stringer joestringer

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.

Setup Ubuntu 16.04 to be used with Vagrant and Virtualbox

Prepare Vagrant box with Ubuntu 16.04

We will use official box "ubuntu/xenial64" and modify it to work with Vagrant.

Vagrantfile

Demo:

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console.log("I'm a code block!");

	#!/bin/bash

	# generate cscope index files in current directory
	# the generated cscope index files also include go standard packages

	if [ $GOROOT = "" ]
	then
	echo "GOROOT is not set"
	exit 1
	fi

	#!/bin/sh

	# in case it's already installled
	vagrant plugin uninstall vagrant-libvirt

	# vagrant's copy of curl prevents the proper installation of ruby-libvirt
	sudo mv /opt/vagrant/embedded/lib/libcurl.so{,.backup}
	sudo mv /opt/vagrant/embedded/lib/libcurl.so.4{,.backup}
	sudo mv /opt/vagrant/embedded/lib/libcurl.so.4.4.0{,.backup}
	sudo mv /opt/vagrant/embedded/lib/pkgconfig/libcurl.pc{,.backup}