Networking/Computing Tips/Tricks

As a follow on to our DNS In Depth article, we wanted to provide a reference to a great tool.

One of the important impacts to how fast the Internet works for users is how fast the Domain Name Service responds to database requests.  For example, if you type www.cellstream.com into your URL and it takes 5 seconds for the DNS server to provide the IP address, the 'speed of the Internet' will feel very slow.

We always like to eliminate possible issues when we are troubleshooting, and we very much like to gather evidence.  So tools that provide this functionality are always of interest to us, as I am sure they are for you.

One such tool we have used since around 2009 is called DNS Benchmark that runs in Windows or using WINE on Linux.  This little article will explain what this tool does.  You can click here to the web page and download the tool from the page.  What you download is an executable.  No install process, just run the executable.  Below you will see I downloaded it:

dnsbench1

 

When you run the program, you will get something like this:

dnsbench2

To get to the point of the tool quickly, click on the Nameservers tab and then click on Run Benchmark:

dnsbench3

The program will start testing the DNS servers:

dnsbench4

The fastest response time servers will be at the top of the list.  Now it will keep running for a while.

Once complete, you can expand the window and view the results of the benchmark/baseline (keep in mind your results will differ from mine):

dnsbench5

To understand the output, click on the Tabular Data tab:

dnsbench6

What we see in order of speed is the DNS server address, its minimum, maximum, and average response times for cached names (red), uncached names (green) and dot com (blue) lookups.

Now click on the conclusions tab:

dnsbench7

Read these conclusions, the output is long and you will have to scroll down.

It is likely that you will see something like this:

dnsbench8

And on my baseline, I was told this:

dnsbench9

Hmmm. Perhaps I should change the DNS setting in my router!?  You have to be careful here, now all providers allow the end user to change these configurations.

Great stuff.  

I hope you find this helpful and that you make use of this free tool.

 

 

 

 

 

 

 

 

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