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Auflistung nach Autor:in "Beierlieb, Lukas"

1 - 4 von 4
  • Konferenzbeitrag
    Addressing Shortcomings of Existing DDoS Protection Software Using Software-Defined Networking
    (Softwaretechnik-Trends Band 39, Heft 3, 2019) Iffländer, Lukas; Geißler, Stefan; Walter, Jürgen; Beierlieb, Lukas; Kounev, Samuel
    DDoS attacks are becoming increasingly frequent and violent. A typical type of attack is the TCP SYN flood, inhibiting a server from opening new TCP connections. Current countermeasures to this attack introduce inefficiencies by either reducing computing resources on the service host or creating new network bottlenecks. In this work, we present a novel approach to mitigate TCP SYN flood attacks using software-defined networking. We perform an initial evaluation of a proof-of-concept implementation that exhibits performance measures close to existing countermeasures while circumventing their inefficiencies.
  • Konferenzbeitrag
    Comparing the Performance of Data Processing Implementations
    (Softwaretechnik-Trends Band 43, Heft 4, 2023) Beierlieb, Lukas; Iffländer, Lukas; Prantl, Thomas; Kounev, Samuel
    This paper compares the execution speed of R, Python, and Rust implementations in the context of data processing. A real-world data processing task in the form of an aggregation of benchmark measure ment results was implemented in each language, and the execution times were measured. Rust and Python showed significantly superior performance compared to the R implementation. Further, we compared the results of different Python interpreters (the most recent versions of CPython and PyPy), also resulting in measurable variations. Finally, a study of the effectiveness of multithreading was performed.
  • Konferenzbeitrag
    Teaching Software Testing Using Automated Grading
    (Proceedings of the Fifth Workshop "Automatische Bewertung von Programmieraufgaben" (ABP 2021),virtual event, October 28-29, 2021, 2021) Beierlieb, Lukas; Iffländer, Lukas; Schneider, Tobias; Prantl, Thomas; Kounev, Samuel
    Software testing has become a standard for most software projects. However, there is a lack of testing in many curricula, and if present, courses lack instant feedback using automated systems. In this work, we show our realization of an exercise to teach software testing using an automated grading system. We illustrate our didactic goals, describe the task design and technical implementation. Evaluation shows that students experience only a slight increase in difficulty compared to other tasks and perceive the task description as sufficient.
  • Konferenzbeitrag
    Towards Testing the Performance Influence of Hypervisor Hypercall Interface Behavior
    (Softwaretechnik-Trends Band 39, Heft 4, 2019) Beierlieb, Lukas; Iffländer, Lukas; Kounev, Samuel; Milenkoski, Aleksandar
    With the continuing rise of cloud technology hypervisors play a vital role in the performance and reliability of current services. Hypervisors offer so-called hypercall interfaces for communication with the hosted virtual machines. These interfaces require thorough robustness to assure performance, security, and reliability. Existing research focusses on finding hypercall-related vulnerabilities. In this work, we discuss open challenges regarding hypercall interfaces. To address these challenges, we propose an extensive framework architecture to perform robustness testing on hypercall interfaces. This framework supports test campaigns and modeling of hypercall interfaces.