Hello,

for those who have experience with pfsense / opnsense and similar solutions, I was wondering if I could add (for example) opnsense in-path between my ISP modem and MikroTik router without disrupting my MT firewall, or well, mainly port forwarding, subnets, etc. I would like to do this in order to perform deep packet inspection.

And as mentioned, I would prefer an "in-path" solution & keeping my MT as my main "firewall" and router, and only use opnsense for DPI.

Here's a simplified diagram. Red circle is where I'd like to have opnsense DPI. Thanks in advance!