Stefan Savage

sting is a TCP-based network measurement tool that measures end-to-end network path characteristics. sting is unique because it can estimate one-way properties, such as loss rate, through careful manipulation and observation of TCP behavior. In addition, using TCP allows sting to leverage the existing Internet infrastructure -- any TCP server can be used as a de facto measurement service -- and it avoids increasing problems with ICMP-based network measurement (blocking, spoofing, rate limiting, etc).


Source code and Binaries

The current version of sting is 0.7. See the README file for for the current set of capabilities and caveats.