How do I configure in Tap or discovery mode

Hi All,

I thought I had done this before some years back, where I could configure the UTM with only one interface (with the switch port mirroring the firewall traffic) and configure it to just discover the network traffic and after about 3-4 weeks it would be able to proivde a report on what traffic was flowing to/from the firewall. I know I can do this by putting it in Bridge mode, but I did not want to disrupt the current network in any way.

can anyone help with this?

thanks