MegaByte875

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.

Installing Openstack VPNaaS, LBaaS, and FWaaS

This brief overview assumes that Openstack Havana has been installed and setup with Neutron Networking. If you have not already done this, you could use "https://github.com/cloudnull/rcbops_allinone_inone" or devstack to setup a dev box and then perform the following actions.

install "openswan":

# (apt-get install openswan neutron-plugin-vpn-agent) || (yum install openswan openstack-neutron-vpn-agent && chkconfig neutron-vpn-agent on)

	#!/bin/bash

	# As the "bufferbloat" folks have recently re-discovered and/or more widely
	# publicized, congestion avoidance algorithms (such as those found in TCP) do
	# a great job of allowing network endpoints to negotiate transfer rates that
	# maximize a link's bandwidth usage without unduly penalizing any particular
	# stream. This allows bulk transfer streams to use the maximum available
	# bandwidth without affecting the latency of non-bulk (e.g. interactive)
	# streams.