FG Internet Measurement and Analysis (IMA)

14 Items

Recent Submissions
Steering hyper-giants' traffic at scale

Pujol, Enric ; Poese, Ingmar ; Zerwas, Johannes ; Smaragdakis, Georgios ; Feldmann, Anja (2019-12-10)

Large content providers, known as hyper-giants, are responsible for sending the majority of the content traffic to consumers. These hyper-giants operate highly distributed infrastructures to cope with the ever-increasing demand for online content. To achieve 40 commercial-grade performance of Web applications, enhanced end-user experience, improved reliability, and scaled network capacity, hype...

Online Replication Strategies for Distributed Data Stores

Semmler, Niklas ; Smaragdakis, Georgios ; Feldmann, Anja (2019-08)

The rate at which data is produced at the network edge, e.g., collected from sensors and Internet of Things (IoT) devices, will soon exceed the storage and processing capabilities of a single system and the capacity of the network. Thus, data will need to be collected and preprocessed in distributed data stores—as part of a distributed database—at the network edge. Yet, even in this setup, the ...

Distributed Mega-Datasets: The Need for Novel Computing Primitives

Semmler, Niklas ; Smaragdakis, Georgios ; Feldmann, Anja (2019-07-07)

With the ongoing digitalization, an increasing number of sensors is becoming part of our digital infrastructure. These sensors produce highly, even globally, distributed data streams. The aggregate data rate of these streams far exceeds local storage and computing capabilities. Yet, for radical new services (e.g., predictive maintenance and autonomous driving), which depend on various control l...

BGP Communities: Even more Worms in the Routing Can

Streibelt, Florian ; Lichtblau, Franziska ; Beverly, Robert ; Feldmann, Anja ; Pelsser, Cristel ; Smaragdakis, Georgios ; Bush, Randy (2018-10-31)

BGP communities are a mechanism widely used by operators to manage policy, mitigate attacks, and engineer traffic; e.g., to drop unwanted traffic, filter announcements, adjust local preference, and prepend paths to influence peer selection. Unfortunately, we show that BGP communities can be exploited by remote parties to influence routing in unintended ways. The BGP community-based vulnerabilit...

Tracing Cross Border Web Tracking

Iordanou, Costas ; Smaragdakis, Georgios ; Poese, Ingmar ; Laoutaris, Nikolaos (2018-10-31)

A tracking flow is a flow between an end user and a Web tracking service. We develop an extensive measurement methodology for quantifying at scale the amount of tracking flows that cross data protection borders, be it national or international, such as the EU28 border within which the General Data Protection Regulation (GDPR) applies. Our methodology uses a browser extension to fully render ...

Stellar: Network Attack Mitigation using Advanced Blackholing

Dietzel, Christoph ; Wichtlhuber, Matthias ; Smaragdakis, Georgios ; Feldmann, Anja (2018-12-04)

Network attacks, including Distributed Denial-of-Service (DDoS), continuously increase in terms of bandwidth along with damage (recent attacks exceed 1.7 Tbps) and have a devastating impact on the targeted companies/governments. Over the years, mitigation techniques, ranging from blackholing to policy-based filtering at routers, and on to traffic scrubbing, have been added to the network opera...

Inferring BGP Blackholing Activity in the Internet

Giotsas, Vasileios ; Smaragdakis, Georgios ; Dietzel, Christoph ; Richter, Philipp ; Feldmann, Anja ; Berger, Arthur (2017-11-01)

The Border Gateway Protocol (BGP) has been used for decades as the de facto protocol to exchange reachability information among networks in the Internet. However, little is known about how this protocol is used to restrict reachability to selected destinations, e.g., that are under attack. While such a feature, BGP blackholing, has been available for some time, we lack a systematic study of its...

Detecting Peering Infrastructure Outages in the Wild

Giotsas, Vasileios ; Dietzel, Christoph ; Smaragdakis, Georgios ; Feldmann, Anja ; Berger, Arthur ; Aben, Emile (2017-08-20)

Peering infrastructures, namely, colocation facilities and Internet exchange points, are located in every major city, have hundreds of network members, and support hundreds of thousands of interconnections around the globe. These infrastructures are well provisioned and managed, but outages have to be expected, e.g., due to power failures, human errors, attacks, and natural disasters. However, ...

Flowtree: Enabling Distributed Flow Summarization at Scale

Saidi, Said Jawad ; Foucard, Damien ; Smaragdakis, Georgios ; Feldmann, Anja (2018-08-20)

NetFlow and IPFIX raw ow captures are insightful yet, due to their large volume, challenging to timely analyze and query. In particular, if these captures span long time periods or are collected at remote locations, storing or transferring them for analysis becomes increasingly expensive. Enabling efficient execution of a large range of queries over ow captures while reducing storage and tra...

Optimizing Gradual SDN Upgrades in ISP Networks

Poularakis, Konstantinos ; Iosifidis, George ; Smaragdakis, Georgios ; Tassiulas, Leandros (2019-01-11)

Nowadays, there is a fast-paced shift from legacy telecommunication systems to novel software-defined network (SDN) architectures that can support on-the-fly network reconfiguration, therefore, empowering advanced traffic engineering mechanisms. Despite this momentum, migration to SDN cannot be realized at once especially in high-end networks of Internet service providers (ISPs). It is expected...

The Dagstuhl Beginners Guide to Reproducibility for Experimental Networking Research

Bajpai, Vaibhav ; Brunstrom, Anna ; Feldmann, Anja ; Kellerer, Wolfgang ; Pras, Aiko ; Schulzrinne, Henning ; Smaragdakis, Georgios ; Wählisch, Matthias ; Wehrle, Klaus (2019-01)

Reproducibility is one of the key characteristics of good science, but hard to achieve for experimental disciplines like Internet measurements and networked systems. This guide provides advice to researchers, particularly those new to the field, on designing experiments so that their work is more likely to be reproducible and to serve as a foundation for follow-on work by others.

One Step at a Time: Optimizing SDN Upgrades in ISP Networks

Poularakis, Konstantinos ; Iosifidis, George ; Smaragdakis, Georgios ; Tassiulas, Leandros (2017-05-01)

Nowadays, there is a fast-paced shift from legacy telecommunication systems to novel Software Defined Network (SDN) architectures that can support on-the-fly network reconfiguration, therefore, empowering advanced traffic engineering mechanisms. Despite this momentum, migration to SDN cannot be realized at once especially in high-end cost networks of Internet Service Providers (ISPs). It is exp...

The growing complexity of content delivery networks: Challenges and implications for the Internet ecosystem

Stocker, Volker ; Smaragdakis, Georgios ; Lehr, William ; Bauer, Steven (2017-03-17)

Since the commercialization of the Internet, content and related applications, including video streaming, news, advertisements, and social interaction have moved online. It is broadly recognized that the rise of all of these different types of content (static and dynamic, and increasingly multimedia) has been one of the main forces behind the phenomenal growth of the Internet, and its emergence...

Distributed Storage Control Algorithms for Dynamic Networks

Iosifidis, George ; Koutsopoulos, Iordanis ; Smaragdakis, Georgios (2017-06)

Recent technological advances have rendered storage a readily available resource, yet there exist few examples that use it for enhancing network performance. We revisit in-network storage and we evaluate its usage as an additional degree of freedom in network optimization. We consider the network design problem of maximizing the volume of end-to-end transferred data and we derive storage alloca...