432 posts categorized "Test & Measurement" Feed

Baselining and Configuring an IOT Device (by Tony Fortunato)

For those of you who have followed my articles and rants, I've talked about baselining equipment now for many years. in this particular article, I will spend a little bit more time showing you how I baselined a webcam – yup another webcam - what it was doing, and how I reconfigured it to stop the unwanted traffic

A common question I get asked is, “How do you baseline wireless equipment?” You've got several options; you can obviously get a wireless analyzer and capture those packets over the air. Another approach is to work from the access points LAN side by using an inline analyzer between the access point and its switch port. Lastly spanning or mirroring that port to an analyzer works just as well.

It's important to remember that every piece of equipment on your network should be profiled or baselined. You should be familiar with what it should communicate with as well as what it is communicating with.

As I said in the video it doesn't matter if it's a refrigerator, a camera, or a thermostat.  You should always find out how these devices behave because at some point you will have to troubleshoot them.

 

 

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NetBeez Quickstart (by Tony Fortunato)

There is no shortage of utilities, applications and full blown network troubleshooting systems out there.  Some are free, and some cost a pretty penny.  Spoiler alert, they ALL have their place in the analysts’ toolbox.

When I present or work with a client, I explain the tools only accounts to 50% of the equation to successfully fixing a problem.  The other 50% is split between knowledge and practice. Think about it for a moment, anyone can buy a pocket knife, but only a few of us can carve something recognizable out of a block of wood.

NetBeez provides a very helpful free version of its product so you can get a feel of what it can do and where it might fit into your specific environment.  In the past I would have to figure out how to schedule, report results and then compile them for a report. Any one of those challenges would immediately turn off most analysts since we have plenty on our plates already.

Look at good old ping for a moment. Sure anyone can ping something

I tested the free virtual appliance, which you can find here https://netbeez.net/product/plans/netbeez-free. The free version supports; one agent, three targets, 1 user, Cloud server account, SMTP alerts, 1 and week data storage which is plenty for me and some of my clients who tried it.

Setup is pretty simple, go to NetBeez and create a cloud account and download their ova file. I used VMWARE workstation with no issues.

Some of the measurements that I tested are:

  • PING, Packet Loss, Round-Trip Time,
  • TCP-based PING test, Round-Trip Time, Packet Loss, Custom port numbers

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How To Rename Your Network Interfaces In Windows (by Tony Fortunato)

From ipconfig to Wireshark, there are many situations where you find yourself referencing your network interfaces. I find it annoying and confusing when I see many Ethernet Adapter’s or Local Area Adapters listed on my screen.

This can be a major issue if you are not physically close to a computer that you have set up as a remote probe or capture agent. Some people I spoke to about fixing this issue reply that they don’t know anything about hacking the registry and worry that it may break something on their computer.

In this video I show you how to quickly and easily fix this issue so there is just one less thing to make your job difficult.

https://www.youtube.com/watch?v=N7fIrKKYx4g

 

 

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How to Reset a Cisco 3750 To Default Factory Settings (by Tony Fortunato)

As a consultant/contractor I usually run into the following scenario where I’m given equipment to configure and it currently has a password. Even though I know the answer, I still ask if they know the password. After several tries of what it should be, I give up and ask if I can reset the device to default and start from scratch.

Over the years I have gone through the process countless times with as many vendors. Some procedures are as simple as holding a reset button and others are complicated that involve calling the vendor for a challenge/response.

Cisco has variations on their reset procedure but mainly consistent which makes it fairly easy. In this video I will show you how to rest a Cisco 3750 switch to factory settings.

 

 

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Tonys bits – Simple IP Config (by Tony Fortunato)

I have been getting a lot of requests to share the software that I use in my classes and in the field, so here we go.

This one is called Simple IP Config. Pretty straightforward software where you create different network profiles that you would need in your environment.  For example you might need a static IP address to configure equipment for the first time.  Or you might need a static IP address for certain networks.

The software is free, has no ads, portable, so nothing to install and lastly, it just plain works well. You can find it here; https://sourceforge.net/projects/simpleipconfig/

Depending on your configuration, you may need to run the software as an administrator and leverage the fact that it uses plain text ini files to further customize.

 



Enjoy

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Saving Specific Packets With Wireshark (by Tony Fortunato)

I’ve received a few requests to update some of the Wireshark basic skill videos since the user interface has changed in version 2.

I just got an email from a new Wireshark user asking how to save packets that result from a display filter.

In this video I cover that procedure and look forward to creating more updated videos

 

 

 

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