Network Operations

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Clusters in the Expanse: Understanding and Unbiasing IPv6 Hitlists

Clusters in the Expanse: Understanding and Unbiasing IPv6 Hitlists

Oliver Gasser

7 min read

Network measurements are an important tool in understanding the Internet. Due to the expanse of the IPv6 address space, exhaustive scans in IPv4 are not possible for IPv6. The best practice when conducting IPv6 measurements is to use so called IPv6 hitlists.

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Measuring Anycast DNS Services Using RIPE Atlas

Measuring Anycast DNS Services Using RIPE Atlas

Kenneth Finnegan

12 min read

A step-by-step guide to how to use the RIPE Atlas measurements infrastructure to characterize the world-wide performance of Anycast DNS services.

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Measuring the KSK Roll

Measuring the KSK Roll

Geoff Huston

23 min read

When viewed as a network infrastructure, looks can be very deceiving when looking at the DNS. It appears to be a simple collection of resolvers and servers. Clients pass their DNS name resolution queries to resolvers, who then identify and ask an appropriate authoritative name server to resolve …

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How to Survive Scheduled DNS Maintenance

How to Survive Scheduled DNS Maintenance

4 min read

DNS has been in use on the Internet for more than 30 years — now it is time for its worldwide maintenance that shall, for the first time in the existence of DNS, require coordinated actions from all operators of DNS servers and DNSSEC validators. What actions do you need to take to survive?

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20,000 Local Internet Registries - A Peek into the Future

20,000 Local Internet Registries - A Peek into the Future

Rene Wilhelm

12 min read

On 25 September 2018, the RIPE NCC passed the milestone of 20,000 Local Internet Registries (LIRs). We look at what's happened since the previous milestone of 15,000 LIRs and share our thoughts about the future: how much time is left for the IPv4 pool, and what are the prospects for membership deve…

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Upstream Visibility: Monitor the Visibility of your Prefix

Upstream Visibility: Monitor the Visibility of your Prefix

Massimo Candela

6 min read

Upstream Visibility is the new tool produced by the Computer Network Research Group of Roma Tre in collaboration with the RIPE NCC. It is a web application which proposes a concise way of visualising interdomain routing data of a specified prefix.

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Microsoft Making Progress Towards IPv6-only

Microsoft Making Progress Towards IPv6-only

Mirjam Kühne

5 min read

Following up from an earlier article, Veronika McKillop, network architect at Microsoft, describes how the organisation is making progress towards an IPv6-only network.

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Persistent DNS Connections for Reliability and Performance

Persistent DNS Connections for Reliability and Performance

Baptiste Jonglez

10 min read

For decades, the Domain Name System (DNS) has relied on UDP as its transport protocol of choice, mostly because of its simplicity. New transports such as DNS-over-TLS and DNS-over-HTTPS are now gaining popularity: they offer increased privacy while preventing the use of the DNS as a DDoS attack vec…

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Let's Connect! Easy to Install and Secure VPN Software that Respects your Privacy

Let's Connect! Easy to Install and Secure VPN Software that Respects your Privacy

Rogier Spoor

3 min read

Going online on unknown Internet hotspots - whether at a restaurant, an airport or in a restaurant - isn't actually very safe or secure for users. This is due to the open character of hotspots which makes it easy to impersonate legitimate hotspots and eavesdrop on traffic - or even serve malware. T…

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Passive Observations of Large DNS Service

Passive Observations of Large DNS Service

Wouter de Vries

5 min read

In 2009, Google launched its Public DNS service, with its characteristic IP address 8.8.8.8. Since then, this service has grown to be the largest and most well-known DNS service in existence. Due to the centralisation that is caused by public DNS services, large content delivery networks (CDNs), su…

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