Banner image

Measurements and Statistics

All articles

stay_alive

Staying Alive - What Is TTL and Why Is It Important for Your DNS Setup?

Author image
Lars-Johan Liman

6 min read

If you know about DNS, you've probably heard of the Time-to-Live (TTL) field. But mistakes with TTL are more common than you might think. Here we look at the quirks of DNS record sets, parent/child domains and how to avoid TTL problems.

Article tags:

20 Likes are disabled for this article.
0
secure

Production Deployment of TCP Authentication Option

Author image
Andrew Gallo

3 min read

The George Washington University recently deployed Transmission Control Protocol Authentication Option (TCP-AO) after a recent code upgrade on its border routers. This further enhances BGP security features already in place on our network.

Article tags:

22 Likes are disabled for this article.
0
button

Push the Button: SIDN Lab's DDoS Testbed in Action at CONCORDIA Open Door 2022

Author image
Thijs van den Hout

7 min read

Over the past months, SIDN Labs have been improving the testbed they developed for the DDoS Clearing House. At the CONCORDIA Open Door event (COD2022) this October, they'll demonstrate how the testbed works as part of the CONCORDIA Threat Intelligence Platform. The team look at the latest changes t…

Article tags:

26 Likes are disabled for this article.
0
odd_block

240/4 As Seen by RIPE Atlas

Author image
Qasim Lone

11 min read

In this article we use data from RIPE Atlas probes to investigate the usage of 240/4, a block of IPv4 addresses 'reserved for future use', formally known as Class E in the wild.

Article tags:

121 Likes are disabled for this article.
2
ooni

Measuring Encrypted-DNS Censorship Using OONI Probe

Author image
Simone Basso

13 min read

In this article we talk through the preliminary results of an encrypted-DNS censorship study currently being conducted by the Open Observatory Network Interference (OONI).

Article tags:

17 Likes are disabled for this article.
2
Journeying into XDP: Part 0

Journeying into XDP Part 2: XDPerimenting with DNS Telemetry

Author image
Luuk Hendriks

16 min read

In this instalment of our Journeying into XDP series, we look into a passive BPF-program that enables us to plot graphs of DNS metrics without altering the DNS packets or touching the DNS software itself.

Article tags:

21 Likes are disabled for this article.
0
iStock-1160031067

Where Did My Packet Go? Measuring the Impact of RPKI ROV

Author image
Koen van Hove

9 min read

Merely doing RPKI ROV does not provide any guarantees where your packet ends up. We conducted an experiment where we look into the impact of RPKI ROV on whether the packet ends up in the intended location based on active beaconing with two servers.

Article tags:

77 Likes are disabled for this article.
1
attack_mark

Stalloris: RPKI Downgrade Attack

Author image
Haya Schulmann

6 min read

Our research considers the impact of malicious publication points on the resilience of RPKI. We explored attacks that target the functionality of the relying party implementations and evaluated the resulting impact on the RPKI validation. We found all the relying party implementations to be vulnera…

Article tags:

24 Likes are disabled for this article.
0
stop-lights

Dealing with the Undercurrent of Unwanted Traffic

Author image
Leslie Daigle

6 min read

It’s common knowledge that there are “bad actors” on the Internet, poking and prodding open ports as they find them. But just how much of this “unwanted traffic” is out there, and how much is “too much” to allow out of a source network?

Article tags:

21 Likes are disabled for this article.
0
ipv6-adoption-flourish-whitespace

IPv6 10 Years Out: An Analysis in Users, Tables, and Traffic

Author image
Rene Wilhelm

12 min read

On 6 June 2012, the Internet Society organised the World IPv6 Launch. On that day, participants switched on IPv6 not just for testing, but to use permanently in production services. As ten years have passed since, we look at how IPv6 adoption and deployment has progressed, in terms of routing, end-…

Article tags:

49 Likes are disabled for this article.
1

Showing 838 article(s)

Previous
1 ... 8 9 10 11 12 ... 84
Next