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

An overview of IPSec

IPSec is a standard suite of protocols that provides security at layer 3, or the IP layer, and was designed to provide the following security features when transferring packets across a network:

  • Authentication: This verifies that the received packet is from the legitimate sender

  • Integrity: This ensures that the contents of the packet did not change during transit

  • Confidentiality: This conceals the payload through the use of encryption

IPSec contains many elements, which will be discussed in the following sections.

Encapsulating Security Payload

Encapsulating Security Payload (ESP) provides authentication, integrity, and confidentiality, which help protect against data tampering and provide message content protection. IPSec implements industry standard algorithms, such as SHA and MD5, to produce a unique identifier for each packet that cannot be forged. These "fingerprints" allow the receiver to determine whether a packet has been tampered with. Packets that are not authenticated...