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Secure network based on CISCO systems
Wagner, Zdeněk ; Beran, Jan (referee) ; Macho, Tomáš (advisor)
This work deals with the matter of Virtual Private Network (VPN) utilizing both contemporary and older protocols and the possibilities of their use. Among the most interesting parts there are those presenting various ways of use of the VPN technology, IPSec protocol, IOS SSLVPN and RSA server with HW token ensuring the two-factor user authentication.
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Definition of principal material directions in the abdominal aortic aneurysms
Bartoňová, Petra ; Slažanský, Martin (referee) ; Polzer, Stanislav (advisor)
This bachelor thesis deals with definitions of principal material directions in idealized geometrical models. The theoretical part is particularly focused on general information of vascular system and abdominal aortic aneurysms in the field of anatomy, histology and surgery, afterwards it is concentrated on the biomechanical point of view. Consequently, the created algorithm is described and used to compare different definitions of principal directions considering the maximum principal stress. In conclusion, the results of FEM analyses are evaluated with respect to further study of this issue.
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CISCO security laboratory exercise
Švec, Martin ; Hajný, Jan (referee) ; Pelka, Tomáš (advisor)
The main purpose of this diploma thesis is to become familiar with the principles and technical solutions regarding security components of Cisco company and configure assigned system according to valid rules of security. In introduction are explained the reasons for networks security solutions. This work also analyses different kinds of security weaknesses which include deficiencies of networks protocols and also the attacks from hackers. The principle of firewall is described and also its particular types. This work is focused on explanation and classification of PIX firewall, which has dominant role in the field of network security. The other equipments of Cisco, which are improving the level of security, are also mentioned. The practical part of this diploma thesis is composed of networks connections and configuration of system consisting of router, PIX firewall and switch. It also includes the detailed procedure and description of configuration of network equipments. The focus is put on minimalization of threats and elimination of DoS attacks.
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Test implementation of the ACP protocol
Ležák, Petr ; Strašil, Ivo (referee) ; Burda, Karel (advisor)
In general this master’s thesis deals with access control methods and their individual modules and in particular with authentication of supplicants. There are listed authentication methods useful in the implementation of the ACP protocol. ACP protocol is also discussed including possibilities and uses. ACP message format is described in detail with AVP format and types. The transaction mechanism is also mentioned here. The main part of the thesis is focused on software design for protocol testing. Possibilities of the testing are discussed and test scenarios are suggested. Consequently, requirements for test software are listed and its implementation is designed. Furthermore, there is technical documentation of the program. The main ideas used in the program are explained in it. The purpose of each part of the program is written including links between them. Finally, there is a manual for the program. It also contains an illustrative example describing how to make and test a simple scenario of the authentication.
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IEEE 802.1x for LAN network admission control
Čuhel, Radim ; Hošek, Jiří (referee) ; Slavíček, Karel (advisor)
This semestral work deals with the control of access to current local networks using IEEE 802.1X protocol. At the beginning of the thesis are the basic concepts of network access control and possible standards and protocols that are used today. The practical output is the implementation of an authentication server in the form of a virtual server in the laboratory, creating a sample network configuration and a laboratory task in which other students will be able to learn the IEEE 802.1X protocol.
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Analysis of pulse wave propagation in aorta
Tichoň, Dušan ; Klas, Roman (referee) ; Burša, Jiří (advisor)
The aim of this diploma thesis is to assess the applicability of pulse wave propagation monitoring in the cardiovascular system in the field of prediction and early diagnosis of abdominal aortic aneurysm (AAA). The very first part is focused on description of heart and blood vessels with its pathological changes in presence of aneurysm. For this reason, current methods of monitoring and surgical treating of AAA were mentioned. Due to their difficult clinical use widely in the population, new methods based on pulse wave monitoring were presented. Using an analytical approach we estimated the difference in the arrival of the pulse wave at measurable locations between healthy and pathological aorta in the order of miliseconds. By experimental monitoring using photoplethysmographic sensors, we observed significant changes of pulse wave velocity with respect to the mechanical properties of the artery wall (mainly associated with age), which we tried to implement by hyperelastic material models used in computational simulations of pulse wave proagation on simplified geometries by fluid structure interaction method. These analyzes should verify applicability of FSI simulations in further development of diagnostic methods of AAA.
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Establishment of the Linux internet gateway using advanced filtering
Matocha, Tomáš ; Pust, Radim (referee) ; Jelínek, Mojmír (advisor)
The thesis Establishment of the Linux internet gateway using advanced filtering focuses on~the installation of~the Linux operating system on~the older computers, that functions as a gateway to connect clients in the internal network to the Internet. The thesis describes creation an advanced filter with using iptables. Shows some types of security against attacks from the Internet. The other chapters are discussed, advanced traffic control mechanism (such as a TC and a qdisc). The system queue, it is highly beneficial where it is necessary to hierarchically divide traffic between users. It describes types of queue and assembled configurations for clients in the internal network. Next chapter describes the DNS server caching-only type and application denyhosts, which increases the overall security system. Have your own DNS server is certified, especially if we want to reduce the data traffic. Last chapter describes the RADIUS server and its implementation using Apache and MySQL database. Furthermore, the configuration options are described and the examples of the particular configurations are provided. Finally, it presented a system for authentication through the RADIUS server. The thesis seeks to provide a~complex view of security and filtering.
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ACP Protocol in Payment Systems
Kunc, Jaroslav ; Burda, Karel (referee) ; Strašil, Ivo (advisor)
Bachelor's thesis focuses on the protocol for the cryptographic systems in payment systems developed for ÚTKO. The thesis analyses now used protocols for electronic payment systems. The thesis describes the basic principle of AAA protocols (Authentication, Authorization and Accounting) and the basic principle of ACP protocol. The thesis includes a discussion of the objectives of the new system for payment transactions and discussion about anonymity of this transactions. The next object of this thesis is to develop scenarios inclusive protocol ACP in electronic payment systems and evaluate this scenarios.
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Solution of the authentification and authorization for wireless local networks
Čížek, Michal ; Pust, Radim (referee) ; Burda, Karel (advisor)
This thesis is about available priciples and methods of authentication and authorization in wireless local area networks. First part is about available methods of authentication with short description each of them and usage analysis for small and middle-sized wireless networks. There is a project of authentication and authorization for school wireless network of three access points in the second part of the thesis, including description of Mikrotik RouterOS configuration and FreeRadius configuration. In the end of the thesis there is a project tests and usage analysis.
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