388 posts categorized "Protocol Analysis" Feed

Diffusing The IT Blame Game With Network Visibility (by Keith Bromley)

Diffusing The IT Blame Game With Network Visibility

How well does your company communicate internally? Specifically, how well do your IT departments communicate with each other?  Enterprises typically contain four or more IT sub departments (Security, Network Operations, Virtual DC, Capacity Planning, Service Desk, Compliance, etc.) and it’s quite common for them to be at odds with each other, even in good times. For instance, there’s often contention over capital budgets, sharing resources, and headcount.

But let’s be generous. Let’s say that in normal operations things are usually good between departments. What happens if there’s a breach though, even a minor one? Then things can change quickly. Especially if there are problems with acquiring accurate monitoring data for security and troubleshooting areas. Finger pointing can quickly result.

So, what can you do? We recently discussed this on an LMTV podcast How To Diffuse The IT Blame Game. One of the answers is to create complete network visibility for network security and network monitoring and troubleshooting activities.

For instance, here are three common sources of issues for most IT organizations:

  • There is a lack of proper access to network data
  • Analytic and security tools can be modified, moved, or just plain disappear without permission
  • Capture and analysis of monitoring data can create business risk and problems for other departments

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Troubleshooting a Cloud Problem with Wireshark (by Paul Offord)

The slowly growing interest in Cloud Computing that started ten or so years ago is turning into a stampede.  Most of our customers at Advance7 have strategic plans to migrate many systems to a cloud platform, and many have already started the journey.

Cloud application topology

In fact, we too have migrated all of our systems into AWS and Azure, containerising many of them in the process. But here's a concern we shared with our customers:

"Will we have enough visibility to troubleshoot performance and stability problems once we have migrated our systems?"

It's a good question.  We don't want to discover that the whole environment is opaque, just when we need to troubleshoot a serious problem.  We satisfied ourselves that we could get the data we needed to maintain our systems.  We found that we could get a lot of information from the Application Load Balancers, and we configured continuous packet captures to record traffic between the tiers of our systems.  Just as well as a couple of months ago we hit a performance problem with the TribeLab Community website.

I managed to record the actions of our Performance & Stability Engineers as they used AWS CloudWatch and Wireshark to investigate the problem.  I pulled together screenshots, video clips and other information to produce a short video case study …

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IoT: Tesla Model S Remote Control (by Jonathan Whiteside, Darrin Roach and Paul Offord)

With the proliferation and expansion of wireless technologies, it is now becoming commonplace for vehicles to be connected to the Internet for numerous reasons, such as website access, telematics and always connected emergency services.

Tesla Motors is very much at the forefront of the ‘Connected Vehicle’ revolution, producing vehicles with ‘always on’ connectivity through 4G LTE and WiFi.  This gives the driver features such as Google Maps navigation, web access and Spotify.

Tesla_control

It also allows remote operation features such as climate control and charge port opening/closing, as well as providing an instant view of battery charge levels.  All these features can be readily accessed from a mobile phone app or desktop app on a PC.

The objective of this experiment was ...

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LMTV LIVE | How to Improve Network Troubleshooting (with Keith Bromley and Bill Coon)

With Paul Offord of Advance7 hosting, Keith Bromley from Keysight Technologies (formerly Ixia) and Bill Coon from Riverbed will be talking about how to use network visibility to improve troubleshooting.

According to an Enterprise Management Associates report (Network Management Megatrends 2016), IT teams already spend around 36% of their daily efforts on reactive troubleshooting efforts. In addition, pressure can increase exponentially on IT personnel as problem resolution time increases, since it directly correlates to network and application slowness and downtime. There is a new LMTV event happening on February 21, 2018. Keith Bromley from Keysight Technologies (formerly Ixia) and Bill Coon from Riverbed will be talking about how to use network visibility to improve troubleshooting. According to an Enterprise Management Associates report (Network Management Megatrends 2016), IT teams already spend around 36% of their daily efforts on reactive troubleshooting efforts. In addition, pressure can increase exponentially on IT personnel as problem resolution time increases, since it directly correlates to network and application slowness and downtime. 

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How TCP Works - MTU vs MSS (by Chris Greer)

Hey packet people! 

There is a big difference between the Maximum Transmission Unit (MTU) on an ethernet connection or IP interface and the Maximum Segment Size in TCP. In this video we will take a look at how and where each is set, how it impacts the encompassed data, and how the network can adjust these settings. 

These core concepts will help when troubleshooting broken or slow connections due to MTU or MSS. 

Hope it helps in troubleshooting with Wireshark! 

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