Technology and Innovation

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Inferring the Deployment of Inbound Source Address Validation Using DNS Resolvers

Inferring the Deployment of Inbound Source Address Validation Using DNS Resolvers

Yevheniya Nosyk

6 min read

Source Address Validation (SAV) is the best current practice (BCP 38/RFC 2827) aimed at filtering packets based on source IP addresses at the network edge. In this article, we show how to identify networks that do not deploy SAV for incoming traffic.

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Journeying into XDP Part 1: Augmenting DNS

Journeying into XDP Part 1: Augmenting DNS

Tom Carpay

16 min read

In this post, we at NLnet Labs look at how eXpress Data Path (XDP) can augment existing DNS software. We share our experiences of implementing Response Rate Limiting in XDP.

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The Lockdown Effect - Implications of the COVID-19 Pandemic on Internet Traffic

The Lockdown Effect - Implications of the COVID-19 Pandemic on Internet Traffic

Oliver Gasser

10 min read

Oliver Gasser and his colleagues have been investigating the impact of COVID-19 on Internet traffic as seen from a variety of vantage points. Here's an overview of their findings.

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RIPE NCC Internet Country Report: Central Asia

RIPE NCC Internet Country Report: Central Asia

Suzanne Taylor

3 min read

We examine the Internet landscape in five different countries in Central Asia as the next in our series of RIPE NCC Internet Country Reports.

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Overcoming the Limitations of UDP Options

Overcoming the Limitations of UDP Options

Raffaele Zullo

6 min read

A recent extension that aims to add support for transport options to the User Datagram Protocol (UDP) is already showing promise. Unfortunately, its deployment may be undermined by the way existing network devices process UDP length and checksum. In this post we at the Electronics Research Group,…

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Measuring QoE by Measuring TCP Connection Establishment Delay in a Service Provider Network

Measuring QoE by Measuring TCP Connection Establishment Delay in a Service Provider Network

Ali Norouzi

6 min read

I’ve created a traffic analyser to help network engineers detect issues related to quality of experience.

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Limiting the Power of RPKI Authorities

Limiting the Power of RPKI Authorities

Kris Shrishak

5 min read

In the beginning, Internet infrastructure was not originally designed with security in mind. Luckily, this mindset has changed over the years, mainly due to the growing number of attacks, and has prompted the design of security measures such as Domain Name System Security Extensions (DNSSEC) and Re…

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DDoS Hide & Seek: On the Effectiveness of a Booter Services Takedown

DDoS Hide & Seek: On the Effectiveness of a Booter Services Takedown

Daniel Kopp

9 min read

In this article, we investigated booter-based DDoS attacks in the wild and the impact of an FBI takedown targeting fifteen booter websites in December 2018. We investigated and compared attack properties of multiple booter services by launching DDoS attacks against our own infrastructure. To unders…

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IPv4 Transfer Markets Misuse: A First Look

IPv4 Transfer Markets Misuse: A First Look

Vasileios Giotsas

7 min read

The secondary IP address market has become a viable source of IPv4 address space, but it may also present opportunities to malicious networks to bypass reputation-based security mechanisms. In this article we summarise the results of our first detailed study of how transferred IPv4 prefixes are mis…

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Journeying into XDP: Part 0

Journeying into XDP: Part 0

Luuk Hendriks

13 min read

Network programming using XDP has been on our radar (and if you are reading this, possibly on yours too!) for a while now. As tooling around this technology has vastly improved, we decided that it was time to finally get our hands dirty and see what this technology is all about.

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