nmap / nmap/npcap

Wireshark on Win11 can't capture local UDP traffic on Mobile hotspot

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Description

Describe the bug
On Win11, I created a mobile hotspot to share WIFI internet. Two devices connect to the hotspot and try local UDP communication. The communication is ok and the traffic packets can be captured by Microsoft Network Monitor, but Wireshark can't capture it.

Seems like other traffics like TCP, broadcast UDP packets can be captured and Win10 doesn't have this issue.

To Reproduce
Steps to reproduce the behavior:

  1. Setup Mobile hotspot on Win11.
  2. Setup two devices connect to the hotspot and do local UDP communication.
  3. Setup Wireshark to capture the traffic.

Expected behavior
Wireshark could capture the local UDP traffic.

Screenshots

Diagnostic information

  • Windows version from winver : WIndows 11 Version 23H2(OS Build 22635.2915)

  • Any special hardware or software that may be relevant: VPN, firewall, antivirus, virtualization (SR-IOV passthrough, etc).
    WIFI interface: Intel Wifi 6 AX200

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No source file, test, or entry point is named. Start by reproducing the Win11 23H2 mobile-hotspot setup with two connected devices, then compare Wireshark and Microsoft Network Monitor captures for local UDP traffic on the Intel AX200 interface. Done means the missing local UDP traffic is captured or the limitation is documented with a confirmed cause.

Written by the indexing model from the issue text.

Assessment

Domain
networking, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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