Zvýšení odolnosti SIP Proxy proti DoS útokům

Abstract

Increasing rate of popularity of VoIP solution in last few years lead to hackers interest for this new platform. One of the most used attack nowadays is DoS, because of its simplicity and big impact. This diploma thesis describes features of SIP protocol and main security threats in VoIP. These knowledge are used for testing robustness of SIP proxy server. Attacks are described in detail, there is made a security precaution for each of them. Way, how to defend SIP proxy against attacks is creating an IPS system, composed as combination Snort, SnortSam and IPtables applications. Part of thesis is also proposal for security steps, increasing inside network safety and SIP proxy security.