Vaclav Oujezsky

Case study and comparison of SimPy 3 and OMNeT++ Simulation

This article presents a case study and comparison of simulations carried out by SimPy 3.0 of Python module and OMNeT++ tool to explore the performance. The target of this comparison is in particular configuration of network for future steps what tools would be good to use. Two simple models of a network were created with Python and C++ language.

Modeling botnet C&C traffic lifespans from NetFlow using survival analysis

In this paper we present a time behavioral analysis of a simulated botnet network traffic, collected and discovered from NetFlow messages. More specifically said - lifespans. The technique, which we used, is focused on to model command and control communication in a botnet network. The lifespan of this referred traffic is modeled by lifelines using Python language.

Modem network vulnerabilities and security testing — Actual threats

The article describes the endpoint security of xDSL modems (routers), outlines the set of tests performed by our team and provides test results. Described vulnerabilities can be exploited to perform a wide DoS attack against ISPs customers. The vulnerabilities have been identified in the Ethernet layer, IP platform layer and in the TCP protocol implementations. All described vulnerabilities can be mitigated by proper ISP configuration depending on the placement of a node in a network.