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Npcap is the Nmap Project’s packet capture and sending library for Microsoft Windows. It implements the open Pcap API using a custom Windows kernel driver alongside our Windows build of the excellent libpcap library. This allows Windows software to capture raw network traffic including wireless networks, wired ethernet, localhost traffic, and many VPNs using a simple, portable API. Npcap allows for sending raw packets as well.

Mac and Linux systems already include the Pcap API, so Npcap allows popular software such as Nmap and Wireshark to run on all these platforms and more with a single codebase. Npcap began in as some improvements to the now discontinued WinPcap library, but has been largely rewritten since then with hundreds of releases improving Npcap’s speed, portability, security, and efficiency. Wireshark users can choose this adapter to capture all loopback traffic the same way as other non-loopback adapters.

To avoid limiting ourselves just to the features and API’s of our oldest supported Windows release, we build and ship drivers for each major platform generation. That way we can use all of Microsoft’s latest technology in our Win10 driver while still supporting legacy systems. Also, the driver is signed with our EV certificate and countersigned by Microsoft so that it works even with the stricter driver signing requirements imposed by Windows We don’t know exactly when Microsoft will remove NDIS 5 or cease the grandfathering of older less secure driver signatures, but WinPcap will cease working when that happens.

While WinPcap was based on LibPcap 1. Support for all Windows architectures x86, x, and ARM : Npcap has always supported both Windows bit and bit Intel x86 platforms. But starting with version 1. This allows PC’s to use the same power-efficient mobile chipsets as smartphones for all-day battery life and always-on LTE connectivity. Extra Security : Npcap can optionally be restricted so that only Administrators can sniff packets.

This is conceptually similar to UNIX, where root access is generally required to capture packets. WinPcap compatibility : Software written for WinPcap is generally source-code compatible with WinPcap so it simply needs to be recompiled with the Npcap SDK to receive all of Npcap’s performance, compatability, and security benefits.

In fact there is even some binary compatability—software compiled with the WinPcap SDK often still works with modern Npcap. We don’t suggest relying on that, however, since compilers and other stack technology has changed dramatically since the last WinPcap SDK release in When porting legacy WinPcap software to Npcap, we do suggest a few minor changes , mostly to ensure your software uses Npcap in preference to WinPcap on systems with both libraries installed. Raw monitor mode More details can be found here.

We’ve also created a feature comparison between Npcap and WinPcap. The free version of Npcap may be used but not externally redistributed on up to 5 systems free license details. Simply run the executable installer. The full source code for each release is available, and developers can build their apps against the SDK. The improvements for each release are documented in the Npcap Changelog. The latest development source is in our Github source repository. Windows XP and earlier are not supported; you can use WinPcap for these versions.

This special version of Npcap includes enterprise features such as the silent installer and commercial support as well as special license rights allowing customers to redistribute Npcap with their products or to install it on more systems within their organization with easy enterprise deployment. The Npcap free license only allows five installs with a few exceptions and does not allow for any redistribution. We offer two commercial license types:.

Licensees generally use the Npcap OEM silent installer, ensuring a seamless experience for end users. Licensees may choose between a perpetual unlimited license or an annual term license, along with options for commercial support and updates. This allows them to bypass the 5-system usage cap of the Npcap free edition.

It includes commercial support and update options, and provides the extra Npcap OEM features such as the silent installer for enterprise-wide deployment. The primary documentation for Npcap is the Npcap User’s Guide. The changes in each new release are documented in the Npcap Changelog.



Npcap: Windows Packet Capture Library & Driver

Note that the examples uses port numberwhich must be configured in the dwnload page. Files: dump. Submit bug reports and feature requests using the issue tracker tcpdumplibpcap.


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