Arkime (formerly Moloch) is a large scale, open source, indexed packet capture and search system. It is available at https://arkime.com
Installing Arkime on FreeBSD is not officially supported according to the Arkime page - It can be done, but requires a bit of massaging.
It's fairly straightforward to get it running on FreeBSD. The key elements are to get the configure
parameters right, and a few other small modifications. One of the dependencies fails to build on FreeBSD (not an Arkime issue), but that can be worked around very easily.