Shadow is a unique discrete-event network simulator that runs real applications like Tor and Bitcoin, and distributed systems of thousands of nodes on a single machine. Shadow combines the accuracy of emulation with the efficiency and control of simulation, achieving the best of both approaches.

Also included are simple Internet topologies and a core plug-in for generating traffic between nodes and through SOCKS proxies.

Quick Setup (installs everything in ~/.shadow):

$ ./setup build --clean --debug
$ ./setup install

Setup and Usage Instructions:

• https://github.com/shadow/shadow/wiki

Bug Reports:

• https://github.com/shadow/shadow/issues

Email Support:

• shadow-support@cs.umn.edu

Shadow Plug-ins and Project Development:

• https://github.com/shadow

Homepage:

• https://shadow.github.io

Contributions can be made by submitting pull requests via GitHub.