Now showing items 1-6 of 6

  • A lightweight algorithm for traffic filtering over sliding windows 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Solé Pareta, Josep; Andriuzzi, Gabriella (2012)
    Conference report
    Restricted access - publisher's policy
    The problem of testing whether a packet belongs to a set of filtered addresses has been traditionally addressed using Bloom filters. They have a small memory footprint and require few memory accesses per query and insertion, ...
  • A practical approach to portscan detection in very high-speed links 

    Mikians, Jakub; Barlet Ros, Pere; Sanjuàs Cuxart, Josep; Solé Pareta, Josep (Springer Verlag, 2011)
    Conference report
    Restricted access - publisher's policy
    Port scans are continuously used by both worms and human attackers to probe for vulnerabilities in Internet facing systems. In this paper, we present a new method to efficiently detect TCP port scans in very high-speed ...
  • Cuckoo sampling: robust collection of flow aggregates under a fixed memory budget 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Duffield, Nick; Kompella, Ramana (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    Collecting per-flow aggregates in high-speed links is challenging and usually requires traffic sampling to hand le peak rates and extreme traffic mixes. Static selection of sam pling rates is problematic, since ...
  • Efficient algorithms for passive network measurement 

    Sanjuàs Cuxart, Josep (Universitat Politècnica de Catalunya, 2012-03-23)
    Doctoral thesis
    Open Access
    Network monitoring has become a necessity to aid in the management and operation of large networks. Passive network monitoring consists of extracting metrics (or any information of interest) by analyzing the traffic that ...
  • Network Polygraph: An innovative network visibility service (not only) for NRENs 

    Barlet Ros, Pere; Sanjuàs Cuxart, Josep; Solé Pareta, Josep; Gandía, Maria Isabel; Malagón, Chelo (2015)
    Conference lecture
    Open Access
    We present Network Polygraph (https://polygraph.io), a network monitoring service based on NetFlow/IPFIX that benefits from more than 10 years of research in the fields of network monitoring and traffic classification at ...
  • Skettching the delay: tracking temporally uncorrelated flow-level latancies 

    Sanjuàs Cuxart, Josep; Barlet Ros, Pere; Duffield, Nick; Kompella, Ramana (2011)
    Conference report
    Restricted access - publisher's policy
    Packet delay is a crucial performance metric for real-time, network-based applications. Obtaining per-flow delay measurements is particularly important to network operators, but is computationally challenging in high-speed ...