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### How can I use dumpcap to capture traffic only on port 53?

I have a server set up that runs a continuous capture for one of my branches. My current argument is:

"C:\Program Files\Wireshark\dumpcap.exe" -i 2 -b files:80 -b filesize:512000 -port 53 -w e:\Captures\COL3_VoIP_Capture.pcap

This works great for capturing ALL traffic. However, I want to set it up to only capture DNS queries. I have tried the following, but it doesn't seem to work.

"C:\Program Files\Wireshark\dumpcap.exe" -i 2 -f "port 53" -b files:80 -b filesize:512000 -port 53 -w e:\Captures\COL3_VoIP_Capture.pcap

Any help would be appreciated!

 2 None grahamb 23384 ●4 ●781 ●226 https://www.wireshark.org

### How can I use dumpcap to capture traffic only on port 53?

I have a server set up that runs a continuous capture for one of my branches. My current argument is:

"C:\Program Files\Wireshark\dumpcap.exe" -i 2 -b files:80 -b filesize:512000 -port 53 -w e:\Captures\COL3_VoIP_Capture.pcape:\Captures\COL3_VoIP_Capture.pcap


This works great for capturing ALL traffic. However, I want to set it up to only capture DNS queries. I have tried the following, but it doesn't seem to work.

"C:\Program Files\Wireshark\dumpcap.exe" -i 2 -f "port 53" -b files:80 -b filesize:512000 -port 53 -w e:\Captures\COL3_VoIP_Capture.pcape:\Captures\COL3_VoIP_Capture.pcap


Any help would be appreciated!