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nmap / npcap

Nmap Project's Windows packet capture and transmission library
https://npcap.com
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Npcap 1.3.1 jams the PPPoE Internet connection #508

Open Theoristos opened 3 years ago

Theoristos commented 3 years ago

I have a Win7 x64 with PPPoE connection to my internet provider ovel local ethernet connection.

Have installed latest Wireshark 3.4.6 with npcap 1.3.1 (with additional option "Support raw 802.11 traffic (and monitor mode) for wireless adapters"). All looks ok, Reload PC.

After trying to start internet connection immediately get an error "813 You have attempted to establish a second broadband connection while a previous broadband connection is already established using the same device or port. Please disconnect the earlier connection and then re-establish the connection." Same error on retrying.

Trying "net stop npcap" - answer is "no such service".

Reload PC - it hangs on shutdown screeen.

On next load started npcap uninstall - it hangs in the middle of process. Reload PC - it hangs on shutdown.

Load into safe mode, successfully uninstalled npcap, Rebooted, installed winpcap & wireshark - works ok,

What is a reason of such behaviour & how to fix that?

Jondoe398 commented 11 months ago

I ran into a similar issue and, as I can tell from the crash dump, the failure point was at the 'NDProxy! PxTapiMakeCall+0x8f'.

Jondoe398 commented 11 months ago

The issue likely pertains to the PPPoE dialing on Windows 7 devices. I utilized the NDIS filter example from WDDK and modified the .inf file to include nolower in FilterMediaTypes. With this configuration, there isn't a blue screen crash, but dialing does fail. However, if nolower is removed, the driver is unable to attach to virtual devices such as WinTun…