DNS Monitoring 101 – Verify DNS Mapping

This Tip of the Day is the first in a three-part series on Domain Name System (DNS) monitoring. The Domain Name System is often described as “the phonebook of the Internet.” While humans access the Internet via domain names such as npr.org or bbc.com, web browsers interact via Internet Protocol (IP) addresses. DNS translates domain names to IP addresses so that…

Four Ways to Mitigate the Impact of DNS Attacks

Last week AWS experienced an eight-hour outage caused from a DDoS attack impacting the cloud provider’s Router 53 DNS web service. As discussed in a previous post, Catchpoint detected the incident five hours before AWS acknowledged the problem. This isn’t the first—nor will it be the last—time an AWS outage…

DNS Performance 101: Zone Files

DNS is the most important component of the Internet so DNS performance needs to be monitored. DNS is basically responsible for translating hostnames to their respective IP addresses, the process of which is quite simple to understand. DNS directs users to your website based on the address information retrieved through…

Analyzing the Impact of a Public DNS Resolver Outage

DNS is the most important component of the engine that keeps the internet running. If DNS is not managed effectively or the servers go down, applications are inaccessible and users are frustrated. Public DNS servers are becoming the preferred DNS server among the internet population. They improve the online customer…

How To Manage DNS in China

This is a guest blog post from Carl Levine, Senior Technical Evangelist at NS1. Boasting the largest population of internet users in the world, China remains one of the greatest opportunities and risks in the proliferation of an open, and free internet. While the country has been “online” since the…