The logical structure of the underlying network is often neglected in the design and deployment of new distributed systems and sometimes can come into play only after the system reach the production state. This can lead to the vulnerability of the system against intruders controlling the properties of the network. This paper describes a simulation system designed to analyze the influence of the logical structure and quality of the network service on a distributed systems workflow and their general testing during unstable network operation. This system allows developers to detect network vulnerabilities of distributed systems in advance and simplifies further development with regard to new findings.