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FUKAČ, T. KOŠAŘ, V. KOŘENEK, J. MATOUŠEK, J.
Original Title
Increasing Throughput of Intrusion Detection Systems by Hash-Based Short String Pre-Filter
Type
conference paper
Language
English
Original Abstract
With an increasing speed of network links, it is also necessary to increase the throughput of network security systems. An intrusion detection system (IDS) is one of the key components in the protection of network infrastructure. Unfortunately, the IDS has to match a large set of regular expressions (REs) in network streams, which has a negative impact on its throughput. Currently, multiple parallel machines have to be used to support 100 Gbps throughput of Suricata or Bro IDS. A fast pre-filtration of network traffic can allow the IDS to achieve a higher overall throughput. Therefore, we have designed a new algorithm, which is able to select a set of short strings that represents an RE set utilized in the IDS. Such a set of strings can facilitate fast and efficient pre-filtration. Compared to previous methods, strings selected by the proposed algorithm can reduce network traffic up to 3.3 times better. Moreover, the algorithm is able to select strings representing a single RE in less than a second, thus allowing fast updates of an IDS ruleset. As all selected strings have the same length, they can be used in a hash-based pre-filter, which is able to process more 100 Gbps of network traffic.
Keywords
regular expressions, network traffic filtration, hash-based short string prefilter, IDS, network security systems, field programmable gate arrays
Authors
FUKAČ, T.; KOŠAŘ, V.; KOŘENEK, J.; MATOUŠEK, J.
Released
16. 11. 2020
Publisher
Institute of Electrical and Electronics Engineers
Location
Sydney (virtual)
ISBN
978-1-7281-7158-6
Book
Proceedings - Conference on Local Computer Networks, LCN
Pages from
509
Pages to
514
Pages count
6
BibTex
@inproceedings{BUT168485, author="Tomáš {Fukač} and Vlastimil {Košař} and Jan {Kořenek} and Jiří {Matoušek}", title="Increasing Throughput of Intrusion Detection Systems by Hash-Based Short String Pre-Filter", booktitle="Proceedings - Conference on Local Computer Networks, LCN", year="2020", pages="509--514", publisher="Institute of Electrical and Electronics Engineers", address="Sydney (virtual)", doi="10.1109/LCN48667.2020.9314812", isbn="978-1-7281-7158-6" }