Michael Patterson : Advanced NetFlow Traffic Analysis
Michael Patterson
Founder and Product manager for Plixer's Scrutinizer NetFlow and sFlow Analyzer as well as Flow Analytics.

IPFIX Flow Direction and Packet Counters

In the world of NetFlow and IPFIX, flow direction is a topic that can confuse some of the best technical minds. It...

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Outsource Network Monitoring to Trusted Experts

Listening to Douglas Mauro, CEO and founder of TruePath Technologies, whose company is trusted with their network monitoring tools for the Verizons,...

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The Role of Media Servers in NG911 and e911

While we take for granted now that we can use text, video and data to communicate with each other, this is...

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Large Enterprises: Think Like a Service Provider When it Comes to Network Connectivity

By: Mae Kowalke, TMCnet Contributor

There is hardly a business today that does not require high speed and high performance Internet connectivity. Let’s face it, quality network access is table stakes for running a successful business in an increasingly connected world where commerce is 24/7/365 and can originate or terminate from anywhere and over any device with a browser.  As a result, ensuring good networking and communications for employees is a major priority for all businesses, but it is an especially daunting one for large enterprises due the volume and the accommodation of rapid change thanks to things like the cloud, BYOD, mobility and the virtualization of the workplace.

A recent Alcatel-Lucent application note, The large enterprise has changed, gave an interesting snapshot of large enterprise IT today.

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IoT News from Cisco, University of Missouri and a new IoT Certification Available

Lots of exciting news in the IoT and M2M spaces today. Cisco unveils six pillars for IoT development and lots of new...

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Broadsoft, Nimble Storage, Vodafone, Hibernia, Sonus and other video Interviews

Erik Linask of TMC interviews Hugh Shannon of AvotusMy video team has been at some of the latest shows in the telecom...

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VoWiFi Will Play a Critical Role in Extending Voice Coverage

Voice over WiFi (VoWiFi)...what’s the big deal?  For instance, I can already engage in VoWiFi with some VoIP clients that are downloaded...

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IPFIX Flow Direction and Packet Counters

July 8, 2015

In the world of NetFlow and IPFIX, flow direction is a topic that can confuse some of the best technical minds. It is an important concept in relation to routers because where information (e.g. byte counters) is gathered can have a significant impact on perceived accuracy.  This is sort of 3 part blog.  Although it isn't totally necessary, it might help the reader to understand a different type of flow directionality first as posted in my other blog. 

Monitoring DNS Traffic for Security Threats

May 13, 2015

As you are probably aware, the Domain Name Server (DNS) plays an important role in how end users connect to the internet. In order to gain some background before reading this blog, you may want to read my post on An Overview of DNS. Once you have a bit more technical information on the DNS behaviors, I think you will find this post more informative.



Building an Incident Response Team: 4 Specialties

February 23, 2015

Are you tasked with building an Incident response team for your company or organization? Have you thought about what their responsibilities will be, how they will be engaged and who the key members will be?

How To Investigate Malware

December 2, 2014

If you are looking to learn about how to investigate malware, chances are you are already infected and under the gun to uncover the source and clean up the mess. Here are a few things to consider before you dig in.

Riverbed NetFlow Analyzer

August 12, 2014

Last year we had a customer contact us to help them invest in the ideal Riverbed NetFlow Analyzer. After receiving a good size packet capture, I spent some time with the other engineers developing a whole bunch of new reports.

NetFlow Calculator for Supermen!

June 4, 2014

When sizing a NetFlow or IPFIX collection appliance, many consumers go looking for a NetFlow calculator.  In order to do some calculations, you'll need to have some numbers handy. For example, what volume of flows per second can all of the hardware combined generate?  This is an important question because it will likely influence the type of collector your team invests in.

A software based collector should be able to scale to well over 40,000 flows per second which is over a couple million flows per minute.  A hardware based solution should scale to well over 100,000 flows per second.  If the solution can be distributed, collection rates well into the multi millions, should be attainable.  The problem that customers need to be aware of is that flow volume is not always directly related to bandwidth consumed.



Software Defined Networks Demystified: 5 Truths

March 15, 2014

For those trying to understand what a Software Defined Network (SDN) is, this post demystifies many of the benefits promised by SDN adversaries.  To do this, I will draw out 5 areas that help you comprehend the truth about where it promises to deliver. First keep in mind that a SDN is broken into two parts: the Control and Data planes.



Cisco AVC Reporting: Flexible NetFlow Configuration

March 9, 2014

The configuration below provides details on how to configure Cisco AVC Reporting / exports in IOS EX. For those of you new to Cisco Application Visibility and Control (AVC) exports.  This configuration allows network administrators to use flow data to report on details such as URLs, latency, retransmits, packet size, TCP window size, jitter, packet loss, etc. Note also that Cisco is making the switch from NetFlow to IPFIX. Check it out:



Configuring Citrix AppFlow Support

February 3, 2014

We have included AppFlow support in our solution for years. This post tries to help with how to configure it so that you can take your AppFlow network traffic analysis to the next level.  

Note: AppFlow can be enabled only on nCore NetScaler appliances.





Palo Alto NetFlow Configuration

January 14, 2014

Today I’m covering the Palo Alto NetFlow Configuration steps.  This is a pretty straight forward two step process that is easy to complete and is supported on all Palo Alto firewalls except the PA-4000 series models.  



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