Book Image

Learning OpenStack Networking (Neutron)

By : James Denton
Book Image

Learning OpenStack Networking (Neutron)

By: James Denton

Overview of this book

OpenStack Neutron is an OpenStack component that provides networking as a service for other OpenStack services to architect networks and create virtual machines through its API. This API lets you define network connectivity in order to leverage network capabilities to cloud deployments. Through this practical book, you will build a strong foundational knowledge of Neutron, and will architect and build an OpenStack cloud using advanced networking features. We start with an introduction to OpenStack Neutron and its various components, including virtual switching, routing, FWaaS, VPNaaS, and LBaaS. You’ll also get hands-on by installing OpenStack and Neutron and its components, and use agents and plugins to orchestrate network connectivity and build a virtual switching infrastructure. Moving on, you’ll get to grips with the HA routing capabilities utilizing VRRP and distributed virtual routers in Neutron. You’ll also discover load balancing fundamentals, including the difference between nodes, pools, pool members, and virtual IPs. You’ll discover the purpose of security groups and learn how to apply the security concept to your cloud/tenant/instance. Finally, you' ll configure virtual private networks that will allow you to avoid the use of SNAT and floating IPs when connecting to remote networks.
Table of Contents (21 chapters)
Learning OpenStack Networking (Neutron) Second Edition
About the Author
About the Reviewers

Disabling port security

By default, Neutron applies antispoofing rules to all ports to ensure that unexpected or undesired traffic cannot originate from or pass through a port. This includes rules that prohibit instances from running DHCP servers or acting as routers. To address the latter, the allowed-address-pairs extension can be used to allow additional subnets and MAC addresses through the port. However, additional functionality may be required that cannot be addressed by the allowed-address-pairs extension.

In Kilo, the port security extension was introduced for the ML2 plugin that allows all packet filtering to be disabled on a port. This is especially useful when deploying instances for NFV purposes. The port security extension requires additional configuration, which will be discussed in the following sections.

Configuring Neutron

To enable the port security extension, edit the ML2 configuration file on the controller node at /etc/neutron/plugins/ml2/ml2_conf.ini, and add the following...