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Nmap Public Source License


Nmap is distributed under the terms of the Nmap Public Source License (annotated HTML version / plain text version). This license is based on the GNU GPLv2, but with important additional terms, conditions, clarifications and exceptions. It also contains a warranty disclaimer and contributor agreement. We believe it is compliant with the Open Source Definition, but we haven't gone through their certification process (which requires an attorney).

This license does not allow for redistributing Nmap for use with (or incorporating it's source code within) proprietary hardware. This includes stand-alone software distribution or inclusion on a hardware appliance, docker container, virtual machine, etc. We do sell licenses which permit this as part of the Nmap OEM program which funds the Nmap Project. Hundreds of software vendors already license Nmap OEM to perform network discovery for their products. Other Nmap OEM benefits include commercial support, updates, and a custom Windows installer offering silent installation and an OEM version of our Npcap Windows packet capturing library. Prices and more details are available here.

The license itself is rather terse, so we have created the Annotated HTML Nmap Public Source License. This version includes further reasoning behind and explanations of the license terms. These annotations are not a legal document or legal advice. If you need to know exactly what the license requires, you need to read and understand the license itself; if you need legal advice, talk to a lawyer.

Note that some releases of Nmap may fall under a previous version of this license, or a different license entirely. The exact terms for a given version of Nmap can be found in the included LICENSE or COPYING file.

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