IMUNES vs OMNeT++

IMUNES is a free multiprotocol emulator and simulator for general-purpose IP network experiments on FreeBSD and Linux. The project says a single physical machine can run hundreds to thousands of virtual nodes. Its GUI helps create and configure nodes and links, and each node has its own IPv4, IPv6, IPsec, socket and firewall configuration and address space. Link controls can introduce delay, bit errors, duplication and bandwidth limits. Standard UNIX APIs are preserved, so BSD and Linux binaries can run unmodified. On Linux it uses Docker for virtual nodes; on FreeBSD it uses jails and netgraph. The project says experiments can be instantiated in seconds and use hardware resources efficiently. Downloads include public source repositories, examples, security scenarios, manuals and VMware and VirtualBox images. Linux use requires kernel version 3.10 or newer and the Docker daemon; the README also instructs users to run experiments as root. The listed latest image is IMUNES-FreeBSD-14.3-RELEASE (BETA), a 4GB amd64 OVA. The project describes JSON configuration and live changes to nodes, interfaces and links during a running experiment.

OMNeT++ is a modular C++ simulation library and framework used mainly to build network simulators. Its discrete-event models consist of communicating C++ modules whose structure is defined in the NED language. Simulations can run in Qtenv, a graphical runtime environment, or Cmdenv, a command-line interface. The IDE Analysis Tool uses Pandas and Matplotlib to analyze and plot results; R and Matlab can also process them. Extensions cover real-time simulation, network emulation, database integration, and SystemC integration, while the INET model library provides Internet stack models and other protocols and components. Packages are offered for Linux, Windows, and macOS, along with a core archive and container images. The project recommends opp_env for installation and uses WSL in its recommended Windows route. Its Academic Public License allows noncommercial teaching and research; commercial work requires a separate license, priced on request. The maker says the software has no telemetry or account system and keeps models and results on the user's computer.