https://blog.mickeyzzc.tech/en/tags/fingerprintx/Recent content in Fingerprintx on Mi&Bee BlogHugo -- gohugo.ioen蓝宝石的傻话Thu, 09 Jul 2026 00:00:00 +0000https://blog.mickeyzzc.tech/en/posts/network/nmap-npsl-license-and-alternatives/Thu, 09 Jul 2026 00:00:00 +0000https://blog.mickeyzzc.tech/en/posts/network/nmap-npsl-license-and-alternatives/<p>Nmap is the gold standard of network scanning, and its fingerprint databases (<code>nmap-os-db</code>, <code>nmap-service-probes</code>) represent over two decades of accumulated knowledge. However, since <strong>Nmap 7.90</strong> (2021), Nmap&rsquo;s license was changed from GPLv2 to <strong>NPSL (Nmap Public Source License)</strong>, adding many restrictions beyond standard GPL terms.</p> <p>This means: even open-source projects that read or embed Nmap&rsquo;s fingerprint data files may constitute derivative works of Nmap and must be released under an NPSL-compatible license. For closed-source commercial products, the compliance risk is even more severe—either open-source the entire project under NPSL, or pay a one-time OEM license fee of <strong>$59,980~$119,980</strong>.</p>