Project Summary
Ostinato is a cross-platform network packet and traffic generator and analyzer with a friendly GUI. It aims to be "Wireshark in Reverse" and thus become complementary to Wireshark.
Features custom packet crafting with any field editing support for several protocols -
L2: Ethernet, 802.3, LLC SNAP, VLAN (with Q-in-Q)
L3: ARP, IPv4, IPv6, IP-in-IP (a.k.a IP Tunneling)
L4: TCP, UDP, ICMPv4, ICMPv6, IGMP, MLD
L5: HTTP, SIP, RTSP, NNTP etc.
Useful for both functional and performance testing.
Works on Windows, Linux, BSD and Mac OS X.
See the Homepage for a full list of features.
In a Nutshell, Ostinato...
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took an estimated 2 years of effort (COCOMO model)
starting with its first commit in April, 2015
ending with its most recent commit about 2 years ago
Quick Reference
GNU General Public License v3.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Use Patent Claims
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Install Instructions
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryMay 12 2026 — Jun 11 2026
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12 Month SummaryJun 11 2025 — Jun 11 2026
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