The Internet is not a good place

13 Oct

Narseo Vallina-Rodriguez, Research Scientist, Networking and Security group, International Computer Science Institute (ICSI), Berkeley, USA

In-house Presentation

The Internet is a messy, complex landscape. Middleboxes such as DNS resolvers, UPnP home gateways, and in-path proxies placed in the IP core of the operators’ networks can significantly
impair a user’s access despite being designed for the contrary. In addition, they tend to modify traffic and some even have 5 y.o. vulnerabilities suggesting the presence of other underlying inefficiencies and bugs.

In this talk, I will describe some of our experiences and efforts finding to map out the terra incognita of the Internet, specifically mobile networks. In our endeavor, we use Netalyzr, a widely deployed end-host measurement tool developed at ICSI. In this talk, we will describe how we extended and adapted the tool to the mobile context, highlighting some of the challenges we are facing in its development, deployment, user incentivization and data analysis. More in detail, I will talk about the impact of business relationships on users’ quality of service, middleboxes behavior, and how handset misconfigurations and customized vendor and operator Android images impact on the certificate Root Stores.

About Narseo Vallina-Rodriguez

Narseo Vallina-Rodriguez is a Research Scientists at the Networking and Security group led by Prof. Vern Paxson at ICSI-Berkeley. Narseo received his PhD from the Computer Lab at the University of Cambridge in 2013 under the supervision of Prof. Crowcroft. His PhD research wasb awarded with a Qualcomm Innovation Fellowship in 2012 and he collaborated extensively with Telefonica Research in Barcelona. His research interests include mobile network measurements (from DNS resolvers to radio layer), security, and privacy.

For more info, visit his website:

This event will be conducted in English


  • Location: Sala 1.1/2 IMDEA Networks Institute, Avda. del Mar Mediterráneo 22, 28918 Leganés – Madrid 

  • Organization: NETCOM Research Group (Telematics Engineering Department, UC3M); IMDEA Networks Institute
  • Time: 01:00 pm
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