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Announcements Data Internet

ANT IPv4 census appears in Library of Congress Blog on Innovative Mapping

John Hessler, a member of the US Library of Congress’ Geography and Map Division wrote a nice blog post about our IPv4 Internet maps: “Computing Space V: Mapping the Web or Pinging your Way to Infinity“.  Check out his take on our IPv4 data!

You too can browse the IPv4 Internet at our website.  Or for detailed analysis, get the data from IMPACT or us.

Thanks to the DHS IMPACT program for supporting collection of this data.

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Presentations

new talk “Infrastructure for Experimental Replay and Mutation of DNS Queries” at the AIMS Workshop 2017

John Heidemann gave the talk “Infrastructure for Experimental Replay and Mutation of DNS Queries” at CAIDA’s Active Internet Measurement (AIMS) Workshop in San Diego, California, USA on March 2, 2017.  Slides are available at http://www.isi.edu/~johnh/PAPERS/Zhu17a.pdf.
From the abstract:

Emulating the DNS hierarchy both efficiently and correctly.

The DNS ecosystem today is revisiting basic design questions: should it encourage TCP? TLS? DTLS? Something completely new like QUIC or HTTP? While modeling and analysis help answer some of these questions, experimental evaluation is necessary for validation, and in some cases the only way to get accurate estimates of software memory use and performance. This talk will discuss our recent work in supporting experimental evaluation of DNS with components that support trace replay and evaluation. Trace replay is supported by a DNS data archive to prime replay with real data, and a query mutation system to support what-if evaluation using variations of that data.

The trace replay system is the work with Liang Zhu; this work is part of a larger system to support DNS experimentation, joint work with Wes Hardaker.

The software discussed in the talk is available at https://ant.isi.edu/software/ldplayer, and this work is part of our progress towards the NIPET testbed.

 

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Presentations

new talk “Collecting and Visualizing Outages Over the Long Haul” at the AIMS Workshop 2017

John Heidemann gave the talk “Collecting and Visualizing Outages Over the Long Haul” at CAIDA’s Active Internet Measurement (AIMS) Workshop in San Diego, California, USA on March 2, 2017.  Slides are available at http://www.isi.edu/~johnh/PAPERS/Heidemann17b.pdf.
From the abstract:

Unmeasurable blocks over time, a challenge in long-haul outage measurement, from [Alwabel15a]
We have been collecting data about outages in the Internet since Oct. 2014. Our outage detection system, Trinocular, uses active probing from four sites to study about 4 million /24 IPv4 address blocks. Long-duration measurements bring challenges that don’t occur in short observations. Most importantly, our target (“the Internet”) changes as we measure it, as new blocks come on-line, old blocks are reused in different ways, and ISPs observe and sometimes block our traffic. Our measurement platform also sees occasional hardware failures. Visualization can assist detection of these problems, allowing human perception to detect changes in data collection that have not previously been anticipated. This talk will discuss the challenges of long-term outage measurement and describe our new algorithm that scales to support clustering of 4M blocks and 3 months of observations for visualization.
Our visualization is joint work with Yuri Pradkin, and analysis of our long-term outages includes work with Abdulla Alwabel.

This talk draws on work from [Alwabel15a].  Data from this talk is available at https://ant.isi.edu/datasets/outage/, and visualizations can be found at https://ant.isi.edu/outage/browse/.

Categories
Presentations

new talk “DNS Privacy, Service Management, and Research: Friends or Foes” at the NDSS DNS Privacy Workshop 2017

John Heidemann gave the talk “DNS Privacy, Service Management, and Research: Friends or Foes” at the NDSS DNS Privacy Workshop in San Diego, California, USA on Feburary 26, 2017.  Slides are available at http://www.isi.edu/~johnh/PAPERS/Heidemann17a.pdf.
The talk does not have a formal abstract, but to summarize:

A slide from the [Heidemann17a] talk, looking at what different DNS stakeholders may want.
A slide from the [Heidemann17a] talk, looking at what different DNS stakeholders may want.

This invited talk is part of a panel on the tension between DNS privacy and service management.  In the talk I expand on that topic and discuss
the tension between DNS privacy, service management, and research.
I give suggestions about how service management and research can adapt to proceed while still providing basic privacy.

Although not discussed in the talks, we distribute some DNS datasets,  available at https://ant.isi.edu/datasets/ and at https://impactcybertrust.org.  We also provide dnsanon, a tool to anonymize DNS queries.