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Giovane Moura

30 May, 2016 02:57 PM
Anycast vs. DDoS - Evaluating the November 2015 Root DNS Event by Giovane Moura — last modified 28 Jul, 2017 10:38 AM

IP anycast has been widely used to replicate services in multiple locations as a way to deliver better performance and resilience. It has been largely employed by CDNs and DNS operators, such as on the root server system. However, there is little evaluation of anycast under stress.

Turning on Anycast on B-Root by Giovane Moura — last modified 09 May, 2017 04:14 PM

The B-root operators have announced that they would enable IP anycast on 1 May 2017 [1]. In this article, we show how that change has been perceived by the RIPE Atlas probes, and if there were any transient effects of this change.

DNS TTL Violations in the Wild - Measured with RIPE Atlas by Giovane Moura — last modified 01 Dec, 2017 04:43 PM

DNS TTL violations is a controversial topic. It basically means a resolver overrides a TTL value provided by an authoritative server, and then serving its clients with this value. In this post, we analyse if this is happening in the wild.