Starting with Chef

You might be asking yourself why a network engineer would be concerning himself with a product like Chef.  It’s a long story, but lets start by saying that my interest was first peaked when I heard that the new line of Cisco Nexus switches would have a integrated Chef client.  I’ve known about Chef and Puppet for a long time, but I’ve never really sat down and looked to see how they worked.  So rather than starting with Chef on Nexus, I thought it would be prudent to get some base experience with the application in a more ‘normal’ application.

So how does this fit into networking?  I think we can all agree that data center networking can change.  I’m carefully phrasing that statement by using the word ‘can’.  If you don’t know it already, I don’t buy the ‘SDN will change everything you do’ line of thinking.  In fact, I try as hard as I can not even to use the term SDN.  Why?  Because it’s far too vague of a term that can mean almost anything depending on you how you want to interpret it.  Beyond being a Continue reading

“This account is locked. You can’t log in” for super user in Junos Space

After a few fat-fingered attempts to get the password entered, i realised I had locked myself out of a new Space installation.  There’s only one user at that stage – ‘super’.  And now I’ve locked the account.  Damn.

To unlock this, you will need to go on the console and enter debug mode.  This means you need to know the admin and maintenance mode passwords.  Assuming you do, do the following:

mysql> use build_db

Database changed
mysql> select * from USER_IP_ADDRESS;
+--------+--------------+---------------------+--------------+----------+---------+
| id     | ipAddress    | ipLockedTime        | failureCount | isLocked | user_id |
+--------+--------------+---------------------+--------------+----------+---------+
| 229377 | 172.20.45.85 | 2014-06-11 16:29:07 |            0 |        1 |     610 |
+--------+--------------+---------------------+--------------+----------+---------+
1 row in set (0.00 sec)

 Update the table to make isLocked 0:

mysql> update USER_IP_ADDRESS set isLocked=0;
Query OK, 1 row affected (0.08 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select * from USER_IP_ADDRESS;
+--------+--------------+---------------------+--------------+----------+---------+
| id     | ipAddress    | ipLockedTime        | failureCount | isLocked | user_id |
+--------+--------------+---------------------+--------------+----------+---------+
| 229377 | 172.20.45.85 | 2014-06-11 16:29:07 |            0 |        0 |     610 |
+--------+--------------+---------------------+--------------+----------+---------+
1 row in set (0.00 sec)

mysql> quit

An introduction to Zero Trust virtualization-centric security

This post will be the first in a series that examine what I think are some of the powerful security capabilities of the VMware NSX platform and the implications to the data center network architecture. In this post we’ll look at the concepts of Zero Trust (as opposed to Trust Zones), and virtualization-centric grouping (as opposed to network-centric grouping).

Note: Zero Trust as a guiding principle to enterprise wide security is inspired by Forrester’s “Zero Trust Network Architecture”.

What are we trying to accomplish?

We want to be able to secure all traffic in the data center without compromise to performance (user experience) or introducing unmanageable complexity. Most notably the proliferation of East-West traffic; we want to secure traffic between any two VMs, or between any VM and physical host, with the best possible security controls and visibility – per flow, per packet, stateful inspection with policy actions, and detailed logging – in a way that’s both economical to obtain and practical to deploy.

Trust Zones of Insecurity

Until now, it hasn’t been possible (much less economically feasible or even practical) to directly connect every virtual machine to its own port on a firewall. Because of this, the Continue reading

An introduction to Zero Trust virtualization-centric security

This post will be the first in a series that examine what I think are some of the powerful security capabilities of the VMware NSX platform and the implications to the data center network architecture. In this post we’ll look at the concepts of Zero Trust (as opposed to Trust Zones), and virtualization-centric grouping (as opposed to network-centric grouping).

Note: Zero Trust as a guiding principle to enterprise wide security is inspired by Forrester’s “Zero Trust Network Architecture”.

What are we trying to accomplish?

We want to be able to secure all traffic in the data center without compromise to performance (user experience) or introducing unmanageable complexity. Most notably the proliferation of East-West traffic; we want to secure traffic between any two VMs, or between any VM and physical host, with the best possible security controls and visibility – per flow, per packet, stateful inspection with policy actions, and detailed logging – in a way that’s both economical to obtain and practical to deploy.

Trust Zones of Insecurity

Until now, it hasn’t been possible (much less economically feasible or even practical) to directly connect every virtual machine to its own port on a firewall. Because of this, the Continue reading

An introduction to Zero Trust virtualization-centric security

This post will be the first in a series that examine what I think are some of the powerful security capabilities of the VMware NSX platform and the implications to the data center network architecture. In this post we’ll look at the concepts of Zero Trust (as opposed to Trust Zones), and virtualization-centric grouping (as opposed to network-centric grouping).

Note: Zero Trust as a guiding principle to enterprise wide security is inspired by Forrester’s “Zero Trust Network Architecture”.

What are we trying to accomplish?

We want to be able to secure all traffic in the data center without compromise to performance (user experience) or introducing unmanageable complexity. Most notably the proliferation of East-West traffic; we want to secure traffic between any two VMs, or between any VM and physical host, with the best possible security controls and visibility – per flow, per packet, stateful inspection with policy actions, and detailed logging – in a way that’s both economical to obtain and practical to deploy.

Trust Zones of Insecurity

Until now, it hasn’t been possible (much less economically feasible or even practical) to directly connect every virtual machine to its own port on a firewall. Because of this, the Continue reading

An introduction to Zero Trust virtualization-centric security

The 24 Rules I Work By – Infographic

I came across this infographic from Anna Vital of Funders and Founders and loved it. As relevant as some of it is, there is an obvious focus on running a startup and not working in IT. Because of that I thought it might be useful to do something similar around the ‘rules’ I work by; my workplace and career philosophy […]

Author information

Steven Iveson

Steven Iveson, the last of four children of the seventies, was born in London and has never been too far from a shooting, bombing or riot. He's now grateful to live in a small town in East Yorkshire in the north east of England with his wife Sam and their four children.

He's worked in the IT industry for over 15 years in a variety of roles, predominantly in data centre environments. Working with switches and routers pretty much from the start he now also has a thirst for application delivery, SDN, virtualisation and related products and technologies. He's published a number of F5 Networks related books and is a regular contributor at DevCentral.

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The post The 24 Rules I Work By – Infographic appeared first on Packet Pushers Podcast and was written by Steven Iveson.

Perspective on Arista IPO and Market Positioning

For the last 20 years, a “silicon moat” that has protected Cisco and other networking vendors from market competition. Arista was one of the first startups to embrace merchant silicon,open source software and a modern software development methodology to focus on core value like reliability and features.

The post Perspective on Arista IPO and Market Positioning appeared first on EtherealMind.

Briefing: HP Helion, Virtual Cloud Networking, FlexFabric 7900, SDN and OpenStack at HP Discover

HP Discover is happening this week and have three announcements that I'm summarising here. They are Virtual Cloud Network (VCN), FlexFabric 7900 switch and a supporting package of consulting to implement cloud in your organisation.

The post Briefing: HP Helion, Virtual Cloud Networking, FlexFabric 7900, SDN and OpenStack at HP Discover appeared first on EtherealMind.

Introduction and LAB tutorial of HP Helion Community Edition, the OpenStack based “cloud” system that can give you a personal cloud!

For best article visual quality, open Introduction and LAB tutorial of HP Helion Community Edition, the OpenStack based “cloud” system that can give you a personal cloud! directly at NetworkGeekStuff.

Hewlett-Packard (HP) is a long enterprise  supporter of cloud technologies and early this year, they released publicly HP Helion Community Edition (CE). HP Helion is HP’s OpenStack based cloud system with which HP plans to provide value added services (both in sense of software and service) with the upcoming release of HP Helion Enterprise edition later this year. In this article, I plan to introduce you to the HP Helion CE, quickly guide you through the installation, basic operations and in the end get you a quick view on the OpenStack architecture in general.

HP and “clouds”

For a long time HP has been providing cloud solution based on their internal Cloud Service Automation or “CSA” system to enterprise grade customers as part of their portfolio. I had access to several projects using this environment and although I still have mixed feelings about their effectiveness, they were a step in the right direction as classical (now called “legacy”) data-centers are loosing popularity to cloud and other automated systems.  The Continue reading

Snort rules for Etumbot

Since publication of the Etumbot blog on Friday, June 6th, we’ve received numerous requests to publish Snort rules for the network indicators described therein. You can find Snort rules for the Etumbot C&C communications on Arbor’s github at

https://github.com/arbor/snort/blob/master/etumbot.rules

While we are not Snort syntax experts, we have performed basic testing for the Etumbot communications we’ve been able to observe over the wire. Specifically, the first three Snort rules for Etumbot RC4 Key Request, Etumbot Registration Request, and EtumBot Ping all triggered successfully when the corresponding network traffic was observed.

Remember to change the SIDs as appropriate for your environment. We also anticipate these rules will be incorporated into the EmergingThreats Open feed in the very near term.

RESTful control of Cumulus Linux ACLs

Figure 1: Elephants and Mice

• Visibility: Cumulus recently added sFlow support, providing the network wide visibility needed for control - see Cumulus Networks, sFlow and data center automation.
• Control: Cumulus Linux Netfilter (ACLs) describes how standard Linux ebtables / iptables configuration files are used to manage the ACL/policy capabilities of the hardware.

Network Diagrams: Font Selection and Production Context. Choosing Slab or Thin fonts

Sometimes it looks right in the drawing tool but doesn't look right in the document. I forgot about balancing the image with the way that it looks on the page with words around it. Another post in my series on Network Diagrams.

The post Network Diagrams: Font Selection and Production Context. Choosing Slab or Thin fonts appeared first on EtherealMind.

Show 191 – Netvisor – the Pluribus Network Hypervisor – Sponsored

Pluribus Networks has a unique approach to Software Defined Networking that turns a network switch into a server and application platform. In this sponsored show, Sunay Tripathi deep dives into Netvisor and explains how it can fit into your network architecture.

Author information

Greg Ferro

Greg Ferro is a Network Engineer/Architect, mostly focussed on Data Centre, Security Infrastructure, and recently Virtualization. He has over 20 years in IT, in wide range of employers working as a freelance consultant including Finance, Service Providers and Online Companies. He is CCIE#6920 and has a few ideas about the world, but not enough to really count.

He is a host on the Packet Pushers Podcast, blogger at EtherealMind.com and on Twitter @etherealmind and Google Plus.

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The post Show 191 – Netvisor – the Pluribus Network Hypervisor – Sponsored appeared first on Packet Pushers Podcast and was written by Greg Ferro.

[minipost] Mikrotik/RouterBoard port-knocking example for firewall/NAT openings

For best article visual quality, open [minipost] Mikrotik/RouterBoard port-knocking example for firewall/NAT openings directly at NetworkGeekStuff.

The situation is very simple, you are away from home (imagine visiting a friend or being at work), but you desperately would like to access your internal LAN FTP/Samba/etc… , but you do not have with you your own notebook or any device with a VPN capability to tunnel to your home securely. So what to do ? You do not really want to open your home firewall and NAT whole internet to the internal PC or server on your LAN. Lucky for you, there exists a trick under a name of “port-knocking” where you can send to your home firewall a sequence of TCP or UDP packets with specific ports (the ports act as a password) and your home system can temporarily open the firewall and NAT to only your source IP from which these packets arrived. In this quick example I will show you how to do this on Mikrotik (where I do this for several years now) and I will point you to generic linux tutorial for the same using iptables in links below.

Main Example

Target: I want to access my Continue reading

Giving a Monkey a Loaded Gun

Cisco COO Claims Amazon as Huge Customer and Other Insights

In this transcript from Seeking Alpha, Gary Moore, Chief Operating Office of Cisco claims that " eight of the global ten over-the-top providers like Amazon are huge Cisco customers". For network architect & strategy types, it's worth reading to see how Cisco intends to extract more revenue from your budget. In particular there are several references to Cisco "analytics service offerings" which Mr Moore states are opportunities for upsell in SmartNet maintenance. It might be worth looking into those products to prepare a "defense against the dark arts" from Cisco account managers.

The post Cisco COO Claims Amazon as Huge Customer and Other Insights appeared first on EtherealMind.

Understand Etherchannel Load Balancing.

Let’s try to define what EtherChannel is and why it exists nowadays as a powerful feature.

Author information

Michał Janowski

I was happy to finish light studies with a specialization active turism :). Than moved to IT world and participated in postgraduate studies which relied upon CCNA exploration course. After that I got my first job in IT as a software tester in Nokia Siemens Networks where I was responsible for verification of code running on radio equipment (3g, LTE). Now, as a Cisco TAC enginner I am helping cutomers resolving problems in their networks. I belong to unit responsible for Catalyst switches, so forgive me as most of my posts would be influenced by the technology I know the best.

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The post Understand Etherchannel Load Balancing. appeared first on Packet Pushers Podcast and was written by Michał Janowski.

Glue Networks at ONUG 2014

Glue Networks had a presence at the last ONUG, where Tom Hollingworth was able to get an overview from Glue’s founder, Jeff Gray:

As you can see, Glue’s product targets the WAN, and specifically addresses the difficult provisioning tasks that most shops do manually. These include but are not limited to:

• Provisioning (and deprovisioning) of QoS resources for various applications like SAP and Lync based off of need and time of day.
• Bringing up remote sites in a standardized, cookie-cutter manner
• Creating and changing PfR (performance routing) configurations on the WAN.

Jeff visited our Tech Field Day round table at ONUG 2014 and gave us a more detailed introduction to the product:

First, some things I think this product does (or will do) well. The configuration of PfR or QoS en masse is a low-hanging use case I’ve mentioned before and even if I can do it using scripts today, having a single tool that does it in a simple way will provide value. These specific configurations are difficult and error-prone, so anything that tackles this is going to be useful.

I also did enjoy hearing about the options for getting the config onto the device. Jeff listed three options for Continue reading

Glue Networks at ONUG 2014