Capture and forward all incomming traffic(all layers and bits:-) unfiltered to

[john99]

Hello

for an attack analysis of my pfSense-box I should be able to capture all traffic before the pfSense-firewall.
Meanwhile it's easy to find TAPS for copper and fiber VDSL-Taps are very expensive.

Question:
Is there a way to forward all incomming traffic (all layers and bits:-) unfiltered to  e.g. an exposed host or harddisk recorder? How?

Thank you very much for any feedback!

John