February 23, 2021

How to Decrypt TLS Traffic in Wireshark Using Session Keys (Chris Greer)

TLS Decryption in Wireshark (Chris Greer) Hey packet gang!

Encryption!! We see more and more of it in our packet traces. What used to be open, clear-text, and easily readable is now locked down, secure, and tough to troubleshoot. Hey that is a GREAT thing for security and ensuring that data is protected when it is in motion.


Until something breaks.

February 22, 2021

How to Remotely Stop a Wireshark Capture When Using Tshark or Dumpcap

How to Remotely Stop a Wireshark Capture When Using Tshark or Dumpcap

One of the advantages of installing Wireshark, is working with and learning the various command line utilities that come along with it. Programs like tshark and dumpcap allow you to capture from the command line. This gives the analyst a lot of flexibility in the field.

For example, you might create a shortcut on a client’s desktop so they can capture packets for you. You can also create a batch file so the system starts capturing when it powered on, which is very helpful when I build remote capture devices.

Tshark and dumpcap can capture with specific parameters like ring buffers, filters, etc.

One popular question I get asked is how to stop dumpcap or tshark after you start it. Normally you would press Ctrl+C to stop the capture. I have to admit that the solution I came up with, is not very elegant, but works.

February 18, 2021

Eat That Frog! for Students: A Review (Paul W. Smith)

 

Eat That Frog! for Students: A Review (Paul W. Smith)

I approached this book as a life-long learner, undaunted by the promised focus on students. From this perspective, the lessons apply to both college students and those in a career where progress requires keeping up with the latest knowledge. Eat That Frog! For Students by Brian Tracy is much more than just the time-management book noted on the cover – it outlines a life-sized strategy for success in the context of a detailed plan for dispatching undesirable tasks and dealing with the stress that life inevitably brings, both in and out of school.


Author Tracy warns that this not a book filled with research and references, but rather a practical guide where the reader can jump straight to the sections of most interest. In spite of this preface, phrases like “Neuroscientists have found that it is impossible to be angry when you accept full responsibility for yourself” seem dubious without backup. If you keep reminding yourself that Brian Tracy is a renowned motivational speaker and view this book as another of his presentations, albeit between two covers, you will find his occasional hyperbole easier to accept.


It wasn’t until I had worked in industry and then returned to college as a Professor that it dawned on me – what I learned in school had less to do with the actual class content than with the process of learning and how it fit into my life. There is never enough time for everything, and author Tracy uses this broader view to help the reader identify the most strategically important task to focus on. This is the frog you must eat first.


The book’s first of 5 sections begins with the three pillars of success – self-esteem, personal responsibility, and goals. Creating and nurturing a picture of yourself as you want to be can have a powerful effect on your performance, while even small moments can sometimes create doubt and fear that subconsciously sabotage your resolve. Building self-esteem with this positive self-image can help you get out of your comfort zone, which is a powerful foe of success. The author stresses the importance of taking absolute personal responsibility for your goals and actions, which must be concrete, achievable, and written down. Persistence, he notes, is more powerful than genius.


The second section focuses on the central topic of the book, time management. Clarity is key here, as procrastination often results from fuzzy tasks with no clear path to completion. Here author Tracy introduces the Pareto Principle – the concept of the “vital few” – to underscore a version of his 80/20 rule. In this case a list of 10 tasks is said to always contain 2 that are more important than the other 8 combined. One of those will stand out as the frog. Although big, this task can be tackled by slicing it up into more manageable pieces. Most of us can relate to the good feelings and increased energy that come from completing and checking off smaller tasks.


The next section caught my attention when I first flipped through the book. It addresses one of my toughest challenges - doing something I am not really interested in. Delayed gratification is nothing new, but the book claims that success in both work and life hinges on the ability to see things with a long-time perspective. While some claim to thrive on the pressure of a looming deadline, research shows the famous adrenaline rush actually reduces focus and efficiency. Much of the motivation-speak in this section will sound familiar, but it helps to remember that we are ultimately determined not by what happens to us, but by how we respond to it. Both our character and our ability to perform at a high level are nurtured by self-discipline.


When I first became a College Professor at a highly ranked and very competitive engineering school, I was invited to a workshop on how to recognize and help students who appeared to be struggling with the academic pressure. Most emails I received the day before an exam involved questions about the course material, but there were often several that could be more aptly described as a cry for help. In the section on “Pressure to Achieve”, the author suggests that procrastination is your worst enemy in this regard, and that a bias toward quick action can get you into the “flow” and derail any feelings of pressure that might come your way. We all need to embrace the fact that no one is coming to our rescue, and that we will be better off if we generate a natural sense of urgency from within and don’t wait for it to seek us out. A core takeaway from this section is Metcalfe’s Hypercorrection Effect- getting something wrong but then correcting yourself actually helps you learn it even better for the future.


The final section reinforces the connection between avoiding procrastination and proactively preventing stress. Thorough preparation, in everything from your workspace and tools to your mental attitude, can build confidence and keep away stress. The author talks about what I’ve always referred to as “analysis paralysis”, where overthinking an action plan can stifle action and ramp up the stress. FOMO is a dangerous symptom of our dependence on electronic gadgets – there is way too much to keep up with and you will always be missing out on something, so condition yourself not to fear that. Technology is both a dangerous master and, if used properly, a wonderful servant -. The author’s guidelines for proper use of technology are both timely and useful. With technology as with other distractions, one of the most powerful and yet difficult words to use in time management is “NO.”


The book wraps up with a list of all 22 ways for stopping procrastination and summarizes each in a sentence or 2. If reading this book is not at the top of your list, you could benefit a great deal from just these 5 pages.


While it may be hard to prove that “Every minute of planning saves ten minutes in execution”, it does support the importance of having clear written goals. Similarly, claiming that confidence and self-esteem are the single most important keys to success may seem like an overstatement, but without them it’s much easier to procrastinate on tasks you don’t feel capable of finishing. There aren’t a lot of personal stories in the book, but one I liked was Tracy’s experience while crossing the Sahara Desert in an Old Land Rover – a great metaphor for breaking large overwhelming tasks into manageable chunks. The book acknowledges the digital tools that surround all of us, but notes that regardless of the method used, the basic ideas remain universal. Exercises at the end of each section help to bridge the gap between reading the authors advice and applying it in practice.


By clarifying the many life-enhancing benefits of getting things done while calling out the roadblocks that cause us to procrastinate, Brian Tracy has provided an insightful and valuable guide.


Author Profile - Paul W. Smith - leader, educator, technologist, writer - has a lifelong interest in the countless ways that technology changes the course of our journey through life. In addition to being a regular contributor to NetworkDataPedia, he maintains the website Technology for the Journey and occasionally writes for Blogcritics. Paul has over 40 years of experience in research and advanced development for companies ranging from small startups to industry leaders. His other passion is teaching - he is a former Adjunct Professor of Mechanical Engineering at the Colorado School of Mines. Paul holds a doctorate in Applied Mechanics from the California Institute of Technology, as well as Bachelor’s and Master’s Degrees in Mechanical Engineering from the University of California, Santa Barbara.

February 17, 2021

New Videos Give IT’s Job A Humorous Touch (Keith Bromley)

 Author –


Need a chuckle along with some valuable information that could make your IT jobs easier? Then look no further and check out these two videos:

New Videos Give IT’s Job A Humorous Touch (Keith Bromley)


Both videos illustrate current IT problems. The first problem refers to about complex it has become to test your network. Validation is a critical function as it lets us find out the truth about our network and how well it is, or is not, functioning. The good news is that there are applications available that make this effort much easier now.


The second video provides an example of how important “up-front” security can be to your application launches. We all know how important security is but it adds a lot of complexity, or so people say. The addition of a network packet broker changes this but offloading data chaining, load balancing, high availability, redundancy, self-healing functionality, etc. to a purpose-built box that can do all of that and more for you.


Faster. Easier. More reliable. More secure. These are the key goals for all enterprise networks. See for yourself, how Keysight’s solutions can significantly enhance your company’s security architecture!

February 15, 2021

Norvado Case Study - NetAlly

 

Norvado Case Study - NetAlly

OVERVIEW

Norvado is Northwest Wisconsin's premiere local broadband technology provider. Founded in 1950, Norvado brings cutting-edge technology to Bayfield County, keeping communities connected, vibrant, and competitive with big-city offerings.


CHALLENGES

In addition to providing industry-leading fiber optic high-speed Internet, Norvado sells, installs and maintains hosted PBX, managed network services, telephone and smart home systems, alarm/surveillance systems, IP television services, and other products for residential, commercial, industrial and educational customers. An important part of the business is the pre- and post-installation assessment, which requires a complete and accurate evaluation of existing equipment and facilities.


Without a thorough inventory of the environment, particularly in instances where critical details such as the IP scheme, number of servers and switches - possibly in hidden locations that are not easily uncovered by the Norvado presales team - it becomes highly challenging to properly assess installation needs.


“Often when we go onsite, we are taking over on-premises management from another company. In instances such as this, the client might not be technically minded and as a result, has little understanding of what's on their network or how it works. Sometimes we arrive onsite and find out the IT person responsible for the equipment has either left or now has other responsibilities leaving no one with a clue about the infrastructure. This presents a real challenge for us because in such cases, we have to reverse engineer the environment to see what is there, so we can uncover their implementation needs. That becomes a time consuming and painstaking process,” explained Grant Kolwitz, Senior Customer Network Technician at Norvado.


Adding to the challenge, Norvado recently acquired another regional broadband service provider. This new entity’s experience with installing servers, networks and access points was somewhat limited, which necessitated Norvado’s field team to travel as much as three hours each way to do a network inventory and/or Wi-Fi survey of a potential new client. This made the task of quoting a job more difficult.

Norvado Case Study - NetAlly


The Norvado field team recognized that a better assessment tool, one that could be easily used by less technically skilled personnel, would be crucial in helping to keep up with the workload of their rapidly expanding business.


SOLUTION

Because the pre-sales survey assessment can be as varied as each client’s individual network environments, Norvado needed a comprehensive testing tool that could be deployed to field team members. The NetAlly EtherScope® nXG all-in-one handheld network analyzer was chosen to enable sales, field engineers and technicians to conduct a wide range of assessment tasks, from project planning, equipment inventory, coverage mapping, deployment, maintenance and documentation of clients’ ever-changing Wi-Fi and Ethernet access networks.



The EtherScope® nXG is used by Norvado’s pre-sales teams to thoroughly assess the client environment and prevent unexpected surprises later in the project. About their use of the analyzer, Grant says, “Our pre-sales team is the first point of contact with the client, so we want them to be equipped with the right tools. Using the EtherScope nXG has allowed pre-sales to gather a great deal of intel without field engineers having to intervene. All they have to do is either plug in or do a scan and collect the data. This tool is a gamechanger.”

Grant went on to explain that because the EtherScope nXG tool was so thorough in collecting and assessing the environment, it meant field engineers didn’t have to follow up with a second site visit. Pre-sales team members were also able to use the AirMapper™ Site Survey App within the EtherScope nXG tool to quickly and easily gather location-based Wi-Fi measurements and create visual heat maps of key performance. This was instrumental for project planning and developing an accurate quote for the installation.

Once the quote is accepted and implementation is completed, field engineers use the EtherScope nXG to conduct a secondary scan to document everything that was done. This documentation is automatically uploaded via the complimentary Link-Live Cloud Service where it can be accessed, reviewed and shared as needed to verify the project was completed as specified.


RESULTS

Putting the EtherScope nXG in the hands of Norvado’s pre-sales team has delivered significant time and cost savings for the business. “The total territory covered by our business can necessitate up to a three-hour drive to be onsite with a client. That’s a lot of time in transit for field engineers such as myself. By giving the handheld EtherScope nXG network analyzer to our pre-sales team, they can conduct pre-assessment surveys and Wi-Fi heat mapping quickly and easily, eliminating the need for a follow-up trip to the site.


The level of accuracy delivered by this tool ultimately saves us critical time and money,” explained Grant, adding that “the ability to create before and after documentation of the Wi-Fi coverage is extremely helpful when sitting down with the client. Now the field team can visually demonstrate the effectiveness of the implementation. Also, documentation, along with pictures, case notes and passwords, are uploaded to the Link-Live Cloud Service, where they are available to clients upon request”.



Grant concludes “The EtherScope nXG and AirMapper Site Survey App has made our pre-sales and field engineering teams far more efficient, minimizing surprises, and getting a fuller, more complete picture of the environment. There are no other tools on the market that do for us what NetAlly’s EtherScope nXG does. It makes our job easier and speeds up our assessments. That means we have more time to meet with clients, which in turn allows us to help grow the business.”


For more information on the NetAlly EtherScope® nXG and AirMapper™ Site Survey visit: www.netally.com/products/etherscopenxg/ or www.netally.com/products/airmapper-site-survey/

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