DNS Server

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deltarho[1859]
Posts: 1682
Joined: Jan 02, 2017 0:34
Location: UK

DNS Server

Postby deltarho[1859] » Apr 06, 2018 20:50

Another on. This one is a bit different and launched last Sunday. It is blindingly fast - checkout DNSPerf under Cloudfare.

Details here

To go to their website simply type in 1.1.1.1 into your browser.
badidea
Posts: 1175
Joined: May 24, 2007 22:10
Location: The Netherlands

Re: DNS Server

Postby badidea » Apr 06, 2018 21:31

Interesting. I wonder what kind of garbage traffic they receive and why they want to analyse that.
caseih
Posts: 1315
Joined: Feb 26, 2007 5:32

Re: DNS Server

Postby caseih » Apr 06, 2018 22:00

It's important for understanding how various types of denial of service attacks work. Some work now through techniques like DNS amplification, where attackers trick DNS servers into attacking a victim with lots of queries and traffic. Knowing how these queries are constructed helps in understanding how to mitigate this.

Over the years I've had many problems with ISP's DNS servers, so I've taken to just running my own recursive resolver that queries all the way to root servers if it needs to, completely bypassing the often unreliable ISP DNS servers, and caching responses so most name lookups are typically lightning fast if they are ones I commonly look up.
badidea
Posts: 1175
Joined: May 24, 2007 22:10
Location: The Netherlands

Re: DNS Server

Postby badidea » Apr 06, 2018 22:03

Some previous experiments with this address range:
https://labs.ripe.net/Members/franz/con ... llution-18

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