Nmap Announce mailing list archives

Npcap Version 1.82 Released with VLAN Tagging and More


From: Gordon Fyodor Lyon <fyodor () nmap org>
Date: Mon, 28 Apr 2025 14:48:31 -0700

Dear Nmap Community,

In preparation for an imminent Nmap release (hopefully this week!), we have
released Version 1.82 of our Npcap Windows packet capture and transmission
driver.  It builds upon the recent 1.81 release to add support for VLAN
tagging.  This allows you to select for packets directed to a certain VLAN
or just inspect the VLAN headers on any packets received.  It's especially
useful for Wireshark users.  You can also now send packets to specific
VLANs.

Npcap also now supports newer versions of the Windows NDIS API, allowing
systems running Npcap to still use bleeding-edge NDIS features like NDIS
Poll Mode, NVGRE with USO, RSSv2, Synchronous OID requests, etc. In future
releases of Npcap we plan to support hardware timestamps and UDP Receive
Segment Coalescing Offload (URO).  We previously had to build, sign, and
distribute separate driver files for each supported NDIS version, but that
is now handled at runtime.

Npcap 1.81 and 1.82 include important performance enhancements and bug
fixes as well.  You can find the full list of improvements at
https://npcap.com/changelog.

As always, you can download Npcap 1.82 from https://npcap.com.  It will
also be included in the imminent Nmap release, and probably the next
Wireshark too.  The free demo version of Npcap allows for unlimited use
with both Nmap and Wireshark.

Organizations wishing to redistribute Npcap or automate internal deployment
with a silent installer can learn about our Npcap OEM Edition at
https://npcap.com/oem.  These licenses directly fund Npcap development as
well as our sponsorship of the Wireshark Foundation.

Thanks for your continued support.

Sincerely,
Gordon "Fyodor" Lyon
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