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![]() ![]() You can also run the command in PowerShell but you need to prepend the command with a. I suggest running a small test capture to see how fast you fill up your desired file size to ensure you have a wide enough window within your capture file set. More traffic will mean more data in less time so your capture window will be smaller. The amount of time that this capture will cover is entirely dependent on how busy your network traffic is. So to interpret the command above, I would be capturing roughly 100MB of packet data in 10MB chunks before the ring buffer kicks in and starts overwriting old capture files. This is optional, but I see no benefit in watching a continual counter. q means to not print the number of captured packets to the command prompt window. w c:\capfilename.pcapng means prepend each capture file with the word capfilename and save it to c:\ with the extension. i “Ethernet2” means use the ethernet adapter with the name “Ethernet 2” which we determined earlier, we could also use the number given to the ethernet adapter when we ran the dumpcap -D command earlier. Less files means less space consumed before it begins overwriting the oldest files. You can set this as low or high as you are comfortable with. b files:10 means capture up to 10 files before overwriting the oldest file. b filesize:10000 means capture until pcapng file is 10,000kb or ~10MB. Now that we have our interface name, we can use the dumpcap command string to begin dumping packet data to a file which is: dumpcap.exe -b filesize:10000 -b files:10 -i "Ethernet 2" -w C:\capfilename.pcapng -q Next run the following command to output the interfaces on your system as seen by dumpcap: dumpcap -D Which will result in an output similar to: c:\Program Files\Wireshark>dumpcap -D 1.In my case it’s C:\Program Files\Wireshark so I’ll use the command: cd c:\Program Files\Wireshark ![]()
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