Nsasoft Network Traffic Emulator generates IP/ICMP/TCP/UDP traffic from clients to server to stress test servers, routers and firewalls under heavy network load. It is a very simple and fast program which can simulate client activity. The tool is designed with a user-friendly interface and is easy to use. Nsasoft Network Traffic Emulator generates IP/ICMP/TCP/UDP traffic from clients to server to stress test servers, routers and firewalls under heavy network load. It is a very simple and fast program which can simulate client activity. The tool is designed with a user-friendly interface and is easy to use.