• NOC.org CDN performance compared to Fastly, Sucuri and CloudFlare – using Curl

    On a previous article, we shared some details on how to test the performance of your website using Curl and how to leverage it to troubleshoot possible performance issues. Leveraging that concept, we created test servers on a few Linode datacenters to get the performance (connect time, time to first…

  • Using curl to test the performance of a website

    Curl is an amazing tool (available by default on Macs and Linux) that allows you to remotely connect to web sites. Think of it as a terminal-based browser that doesn’t try to parse the HTML. For example, if you want to get the HTML content for noc.org, all you would…

  • We love to dig (DNS troubleshooting)

    Here at NOC, we spent a lot of time investigating and dealing with DNS. And the best tool to troubleshoot DNS is called dig. Dig comes by default on most Linux distributions and on MacOS (sorry Windows users, you are stuck with nslookup by default). All your have to do…

  • Registries, Registrars and DNS

    NOC.org is a collection of networking tools and services that are designed to make a network administrators life just a tad bit easier. At it’s core is an Authoritative DNS service. Great! But what exactly is an authoritative DNS service? Before we can answer that question, we have take a…