fir3net
September 08, 2017

vSRX on an Isolated Network - How do I Provision via Cloud-Init?

in OpenStack
Background Introduced within the Junos OS Release - 15.1X49-D100 - the vSRX now comes with cloud-init. As per Junipers configuration guide, ... the cloud-init package (version 0.7x) comes pre-installed in the vSRX image to help simplify configuring new vSRX instances operating in an OpenStack environment according to a specified user-data file. Cloud-init is performed during the first-time boot…

Troubleshooting Connectivity to the Neutron Metadata Proxy

in OpenStack
Introduction After troubleshooting a recent issue with accessing meta services from a guest instance, and jumping through the various steps within…

OpenStack Neutron - What is Port Security?

in OpenStack
What is Port Security? By default, Neutron enforces the following port security restrictions: Security Groups - All incoming and outgoing traffic is…

A Guide to Network Function Virtualization (NFV)

in Concepts and Terminology
Introduction NFV is a term that has been around for a few years now. As vendors and the open source communities look to drive the adoption of NFV, a…

OpenStack Partitioning - Regions, Availability Zones and Host Aggregates

in OpenStack
An OpenStack Cloud can be divided into three main hierarchical zones - Regions, Availability Zones and Host Aggregates. Regions A Region is full…

Interface to Network Security Functions (I2NSF)

in Standards and Frameworks
Interface to Network Security Functions (I2NSF) is a working group within the IETF formed to define a set of interfaces and data models for…

What is MacVTap?

in Linux
Definition MacVTap is a Linux device driver, based upon the combination of - Macvlan and TAP (descriptions below), that allows for the creation of…

The Journey of a Frame through a Linux Based System

in Linux
Abstract The scope of this article is to describe, at a high level, the journey a frame takes through a Linux based system. NOTE This article does…

What Is the Difference between QEMU and KVM?

in Linux
The differences between QEMU and KVM are not always clear. I mean, are they the same, or are they different? Aren't they both hypervisors? Lets begin…

How to Build an OpenStack Network using the OpenStack CLI

in OpenStack
Introduction Within this article we will detail the steps required to build a simple Neutron networking topology using the OpenStack CLI. Topology…

TUN, TAP and Veth - Virtual Networking Devices Explained

in Concepts and Terminology
Computer systems typically consist of a (or set of) networking devices, i.e eth0, eth1 etc. These network devices are associated to a physical…