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Detection of Mobile Apps in Network Traffic Using JA3 Fingerprinting
Vavro, Ján ; Grégr, Matěj (referee) ; Matoušek, Petr (advisor)
In recent years, mobile network communication became more secure. The reason is encapsulation with TLS protocol, that encrypts transmitted data. User security was increased, but on the other hand it limits network monitoring possibilities, because the data are encrypted. This thesis researches possibilities of monitoring mobile applications in network traffic using JA3 and JA3S fingerprints. The aim is to implement tools for automated creation of fingerprints database and consecutive detection.
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Linux OS Monitoring
Korček, Juraj ; Očenášek, Pavel (referee) ; Trchalík, Roman (advisor)
The aim of this bachelor's thesis is design and implementation of monitoring tool for GNU/Linux operating systems. This program monitors logs created by system, system load and computer resources. It notifies system administrator in case of high system load, abnormal behavior or when an error occurs. The resulting product is especially aimed for system administrators of GNU/Linux, whose work will be simplified due to this software utility, which sends notification of only important system changes. It is implemented in scripting language Python and divided into smaller independent scripts for easy implementation of new scripts in the future. This programming language was chosen to ensure operation among all GNU/Linux distributions.
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BitTorrent Tracker-Less Peer Monitoring
Vaško, Martin ; Pluskal, Jan (referee) ; Polčák, Libor (advisor)
The goal of this thesis is to effectively monitor peers within BitTorrent network. This research is based on distributed hash tables, specifically MLDHT. In the last decade, focus has also been on efficiency of monitoring within network. Existing algorithms do not provide actual efficiency therefore it is recommended to introduce an estimate accuracy using Bernoulli process. The goal of monitoring is to ensure the highest success of peer search. The work focuses on designing and implementing Bernoulli process model. The measurements show that, the in-depth search (LIFO) is better in the short run. The work focuses on the efficiency of time monitoring, estimation of the peer search error and efficiency using the modeled Bernoulli process. Result of this work is the recommended monitoring time with high efficiency.
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Implementation of Message Queue as a Service in Cloud Computing
Hanus, Tomáš ; Burget, Radek (referee) ; Rychlý, Marek (advisor)
Thesis discusses about different ways of a communication between components of a distributed system. It describes a communication using a message exchange and at the same time talks about other alternatives. It adds details about various models of a message exchange, various message types and about various specifications as well. Commercial tools ActiveMQ, RabbitMQ and Kafka are presented. Special emphasis is placed on describing the way these tools exchange messages, scalability options and others. The web service is designed according to the described features. Its main purpose is management and monitoring of the tool by user choice and easy replacement of this tool with another one. Designed application is implemented using the Kotlin language for selected tool RabbitMQ. The implemented solution allows a simple exchange of messages through the REST api.
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Network Access Monitoring in OnePK Enabled Networks
Kollát, Samuel ; Polčák, Libor (referee) ; Ryšavý, Ondřej (advisor)
This report contains design, architecture and implementation of a system that is used to~monitor services and files in computer networks. The monitoring system is based on~principles of software defined networks. The~first part of the report focuses on the description of~ SDN principles and OnePK platform, which is used for the construction of the monitoring system. The second part of the work consists of the design and implementation of~the~monitoring system as a OnePK application. Finally, the evaluation of the monitoring system is provided.
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Control and monitoring of climate in groups of terrariums
Pavlišin, Tomáš ; Petyovský, Petr (referee) ; Macho, Tomáš (advisor)
The aim of this master thesis is to propose a system for monitoring and regulation the climate in groups of terrariums using Raspberry Pi platform and with subsequent well-arranged representation through the web server. Each group of terrariums has its own measure and regulation device Arduino NANO that wirelessly communicates with central computer Raspberry Pi. The measured values are stored in the MySQL database in central computer. These values are then graphically displayed on the web page. Limit values for regulation and regulation times can also be set through web page.
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Profiling of Network Entities to Improve Situational Awareness
Bolf, René ; Tisovčík, Peter (referee) ; Žádník, Martin (advisor)
Having a good situational awareness is an important part of computer security. Knowing what is connected to the network, where it is located, and who is communicating can help make better and faster decisions when security incidents occur. This thesis is focusing on the profiling of network entities at the device level. More specifically, it focuses on the passive identification of operating systems. Every packet transferred in the network carries a specific information in its packet header that reflects the initial settings of a host's operating system. The set of these information is called the "fingerprint" of an operating system. In the thesis, there is described an implementation of a machine learning classifier using the decision tree method, which uses features from TCP and IP headers. The classifier was evaluated on a data set containing data from real network traffic and has achieved accuracy of 96 % when classifying into 9 classes of operating systems.
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Supervision and Control System for a Hotel Implemented by IoT Means
Hockicko, Matej ; Smrčka, Aleš (referee) ; Janoušek, Vladimír (advisor)
This work solves the design and prototype implementation of supervision and control system for a hotel implemented by IoT means. The solution is based on ESP microcontrollers, which control the connected sensors and actuators. ESP devices are futher grouped and connected to central point within range. Using this point, MQTT communication is futher transmitted to the cloud. The cloud runs the IoT Core service, which allows to control and store the status of devices. There is also a Node-RED developmnet tool, in which a graphical interface was created for this system. The result of this work allows remote monitoring and control of the hotel using sensors and actuators connected to this network.
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Control and monitoring of climate in groups of terrariums
Pavlišin, Tomáš ; Petyovský, Petr (referee) ; Macho, Tomáš (advisor)
The aim of this master thesis is to propose a system for monitoring and regulating the climate in groups of terrariums using the Raspberry Pi platform and subsequent transparent display through the web server. Each group of terrariums has its own control device that wirelessly communicates with the Raspberry Pi control computer. The measured values are stored in the MySQL database on the control computer. The measured values are graphically displayed on the web page.
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Secure Remote Computer Management System
Heško, Peter ; Hranický, Radek (referee) ; Polčák, Libor (advisor)
Deployment and management of remote systems poses several problems. Their administration and monitoring is much faster and more cost-effective when done remotely than when physical access to the system is required. Software that allows this is in many cases not freely available or has limited functionality. In this work I deal with the analysis of available solutions and then design and implementation of an application that combines all the required features. The result is software that provides secure access to and monitoring of remote computers running Ubuntu 16.04.
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