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Securing IP PBX against attacks and resistance testing
Kakvic, Martin ; Šedý, Jakub (referee) ; Šilhavý, Pavel (advisor)
This diploma thesis focuses on attacks on PBX Asterisk, FreeSWITCH and Yate in LTS versions. In this work was carried out two types of attacks, including an attack DoS and the attack Teardown. These attacks were carried out using two different protocols, SIP and IAX. During the denial of service attack was monitored CPU usage and detected if its possible to establish call and whether if call can be processed. The Security of PBX was build on two levels. As a first level of security there was used linux based firewall netfilter. The second level of security was ensured with protocols TLS and SRTP.
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Possibilities of simulation and optimization of queuing systems in MATLAB
Kakvic, Martin ; Leixner, Martin (referee) ; Krajsa, Ondřej (advisor)
This master thesis deals with the possibilities of simulation and optimalization of ethernet networks in Matlab interface. Ethernet technology, quality of service and architecture of differentiated services are described in this thesis. Based on these facts, there was created a toolbox. This toolbox allows to create a dynamic network, which can be configured via using GUI. In the end of the thesis, there are shown results of the simulation of networks, which is running in created program.
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Possibilities of simulation and optimization of queuing systems in MATLAB
Kakvic, Martin ; Leixner, Martin (referee) ; Krajsa, Ondřej (advisor)
This master thesis deals with the possibilities of simulation and optimalization of ethernet networks in Matlab interface. Ethernet technology, quality of service and architecture of differentiated services are described in this thesis. Based on these facts, there was created a toolbox. This toolbox allows to create a dynamic network, which can be configured via using GUI. In the end of the thesis, there are shown results of the simulation of networks, which is running in created program.
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|
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Securing IP PBX against attacks and resistance testing
Kakvic, Martin ; Šedý, Jakub (referee) ; Šilhavý, Pavel (advisor)
This diploma thesis focuses on attacks on PBX Asterisk, FreeSWITCH and Yate in LTS versions. In this work was carried out two types of attacks, including an attack DoS and the attack Teardown. These attacks were carried out using two different protocols, SIP and IAX. During the denial of service attack was monitored CPU usage and detected if its possible to establish call and whether if call can be processed. The Security of PBX was build on two levels. As a first level of security there was used linux based firewall netfilter. The second level of security was ensured with protocols TLS and SRTP.
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