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dc.contributor.authorRasmus Kai
dc.contributor.authorKokkonen Tero
dc.contributor.authorHämäläinen Timo
dc.contributor.editorRocha, Álvaro
dc.contributor.editorAdeli, Hojjat
dc.contributor.editorDzemyda, Gintautas
dc.contributor.editorMoreira, Fernando
dc.contributor.editorPoniszewska-Marańda, Aneta
dc.date.accessioned2024-06-06T06:25:50Z
dc.date.available2024-06-06T06:25:50Z
dc.date.issued2024
dc.identifier.citationRasmus Kai, Kokkonen Tero, Hämäläinen Timo. (2024). Distribution of Invalid Users on an SSH Server. In Á. Rocha, H. Adeli, G. Dzemyda, F. Moreira, & A. Poniszewska-Marańda (Eds.), <i>WorldCIST 2024 : Good Practices and New Perspectives in Information Systems and Technologies</i> (985, pp. 139-151). Springer. Lecture Notes in Networks and Systems. <a href="https://doi.org/10.1007/978-3-031-60227-6_12" target="_blank">https://doi.org/10.1007/978-3-031-60227-6_12</a>
dc.identifier.otherCONVID_213737577
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/95573
dc.description.abstractThe Secure Shell (SSH) server on a Unix-like system is a viable way for users to login and execute programs on the system remotely. Remote access is something that hackers also want to achieve, making SSH servers a target for attack. A quantitative study was made of the distribution of usernames and IP addresses in failed login usernames on a publicly available SSH server. The failed logins and IP addresses were ranked according to the number of occurrences producing a distribution. The results indicated that the elements followed approximately a distribution with an inverse relationship with the rank of the element similar to what is known as the Zipf’s Law. An important consequence of the Zipf’s law is that 20% of elements are responsible for 80% of consequences, which means that by blocking 20% of the failed login usernames or IP addresses, 80% or more of the failed logins are also blocked. This was found to be true for a real-world scenario. Some topics were identified for further research.en
dc.format.extent228
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofWorldCIST 2024 : Good Practices and New Perspectives in Information Systems and Technologies
dc.relation.ispartofseriesLecture Notes in Networks and Systems
dc.rightsIn Copyright
dc.titleDistribution of Invalid Users on an SSH Server
dc.typeconferenceObject
dc.identifier.urnURN:NBN:fi:jyu-202406064333
dc.contributor.laitosInformaatioteknologian tiedekuntafi
dc.contributor.laitosFaculty of Information Technologyen
dc.type.urihttp://purl.org/eprint/type/ConferencePaper
dc.relation.isbn978-3-031-60226-9
dc.type.coarhttp://purl.org/coar/resource_type/c_5794
dc.description.reviewstatuspeerReviewed
dc.format.pagerange139-151
dc.relation.issn2367-3370
dc.relation.volume985
dc.type.versionacceptedVersion
dc.rights.copyright© 2024 The Author(s), under exclusive license to Springer Nature Switzerland AG
dc.rights.accesslevelembargoedAccessfi
dc.relation.conferenceWorld Conference on Information Systems and Technologies
dc.subject.ysohakkerit
dc.subject.ysotietoverkot
dc.subject.ysoetäkäyttö
dc.format.contentfulltext
jyx.subject.urihttp://www.yso.fi/onto/yso/p22619
jyx.subject.urihttp://www.yso.fi/onto/yso/p12936
jyx.subject.urihttp://www.yso.fi/onto/yso/p20557
dc.rights.urlhttp://rightsstatements.org/page/InC/1.0/?language=en
dc.relation.doi10.1007/978-3-031-60227-6_12
jyx.fundinginformationThis research was partially funded by the Resilience of Modern Value Chains in a Sustainable Energy System project, co-funded by the European Union and the Regional Council of Central Finland (grant number J10052).
dc.type.okmA4


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