Tag Archives: routing

Starbucks WiFi must be slow on purpose

Posted on May 4, 2014 by jrothmanshore

Walk into a Starbucks or just about any other coffee shop in this country, and you will see the same thing: dozens of people sipping coffee while hunched over laptops as they work or study. In the corners, you may spot … Continue reading →

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Solved: Windows 7 laptop connects to wireless network but cannot access internet

Posted on June 16, 2012 by jrothmanshore

A few weeks ago, I brought home my work laptop so that I could take care of some tasks over the weekend.  I have done this before, so it already knew my wireless network and connected just fine.  However, even … Continue reading →

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A powershell script for running reverse lookups on many IP addresses at once

Posted on May 10, 2012 by jrothmanshore

I often find myself looking at web logs when researching anomalous traffic on our servers.  It’s not uncommon for a poorly written web scraper to come through the system and generate spurious errors, and I start looking at what IP … Continue reading →

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Map of the world’s submarine data cables highlight challenges of routing internet traffic

Posted on July 14, 2011 by jrothmanshore

I came across a very interesting site today – http://www.cablemap.info.  It’s an overlay of the world’s submarine data transmission cables on top of google maps, allowing you to see how the world interconnects.  It appears to be the work of … Continue reading →

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How Akamai routes traffic (hint: it’s not always dynamic)

Posted on June 29, 2011 by jrothmanshore

I thought I had a full grasp of how Akamai routing works, but a recent dive into our web logs has taught me that world of high speed internet traffic routing is more nuanced. One of the big selling points … Continue reading →

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Troubleshooting Akamai: How to geolocate an IP Address

Posted on February 25, 2011 by jrothmanshore

Akamai provides enormous value by accelerating content delivery around the world. However, as I described a few months back, Akamai relies on the DNS server that processes the request to determine where to accelerate traffic. Large, global corporations often have complex … Continue reading →

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Comcast / Level 3 network peering dispute exposes failures in a private market internet

Posted on November 30, 2010 by jrothmanshore

Comcast is threatening to cut off Netflix streaming unless an Internet backbone provider, Level 3, agrees to pay it money.  Comcast is quickly turning into the poster boy for Network Neutrality, and in the process, it is highlighting the inefficiencies … Continue reading →

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The DNS Challenges of Using Akamai Sites for Global Corporations

Posted on November 16, 2010 by jrothmanshore

Akamai’s web application accelerator product has been a tremendous benefit for our global operations.  Using their tools, we have observed a 400% performance boost between the United States and Asia versus accessing our site over “public” internet.  The benefits come … Continue reading →

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