12 years of development and 13 releases later, Ostinato reaches 1.0
(Upto 40% off on bundles)
- Get it now!


Ostinato is a packet generator and network traffic generator with a friendly GUI. Also a powerful Python API for network test automation. Craft and send packets of several streams with different protocols at different rates. Think of it as “Wireshark in Reverse”.

Ostinato aims to provide a traffic generator and network testing tool for every network engineer and developer - something not possible today with existing commercial network test equipment. With the right tool, network developers and engineers can do their jobs better and improve the quality of networking products.

What Ostinato cannot do

  • Ostinato is stateless - stateful connection-oriented TCP connections are not supported. Please try TRex or Warp17 instead.
  • Ostinato cannot be used for generating fake traffic to websites





September 2019

January 2019

December 2017

October 2016

  • Winners of the VIRL Giveaway 2016 announced - Shane S and Sooraj T

See All News


…thanks for developing ostinato: this was a really missing piece in the open-source networking world - Luca Deri (ntop.org) [Email]

Before I go any further I need to give another shout out to an excellent open source piece of software I found. Ostinato turns you into a packet ninja. There’s literally no limit to what you can do with it. Without Ostinato I could have never gotten beyond this point - Kristian Kielhofner (“Packets of Death” AstLinux, Star2Star) [Blog]

Napatech supports a number of open-source software applications that can also help customers accelerate their development … Ostinato for Traffic Generation [Press Release]

Ostinato is more stable [than similar tools] and has a more complete roadmap [Blog]


Questions/suggestions/feedback? Post to the Ostinato forum (Your question may already be answered - please search the forum before posting a new question)