Winpcap npf driver not running

That's strange, because I am in the local admins group, and the SDDL string for the 'npf' service shows that the RP and WP permissions are allowed to the built-in administrator group. It sounds like you're not running it from an elevated command prompt. Active 4 years, 7 months ago. First, you need to confirm whether the npf.

If the file does not exist, please re install WinPcap. If not, re install WinPcap and try again. A totally automatic way? No, because you must start the NPF service as administrator, but you shall not run Wireshark as administrator. When it opened, input net start npf , then the NPF driver is successfully opened. That is,the file npf. If you are using Windows XP, login with administrator account then open cmd, input net start npf.

This worked for me and seems to be the best solution if you don't want the WinPCap-Drivers being loaded everytime when Windows starts.

Don't do that!! There is a good reason security for the privilege separation. Really not recommended from a security of your system point of view, see the Wiki page on Capture Privileges. You can start WireSharp as admin. The exception being raised is Unable to open offline adapter: bad dump file format , and it occurs in the routine CaptureFileReaderDevice at line:.

What's interesting, is that Wireshark Version 1. I looked more closely at WireShark's version information, and apparently it's using a version of WinPcap without AirPcap support.

The short answer is that the originating server is generating pcap-ng capture files, and that format is not currently supported by WinPcap, therefore SharpPcap cannot open those files. The current version of Wireshark, however, does support pcap-ng capture files.

I found the Libpcap File Format in the Wireshark docs, and according to the Global Header section, I've got a dump file containing the magic number 0x4d3c2b1a as displayed on my Windows 7 system. For nanosecond-resolution files, the writing application writes 0xa1b23c4d, with the two nibbles of the two lower-order bytes swapped, and the reading application will read either 0xa1b23c4d identical or 0x4d3cb2a1 swapped.