New to this forum, but have been using pfsense for a while, but no expert..
It doesn´t matter at all, but that said, like mentioned before, snort and suricata are not set it up and forget it packets!
It´ll be more on the need to fine tune more and more and also get new rules for that will be a work for itself.
I'm just looking for best practice regarding hardening pfsense and snort, without using all my time on false positives.
We all do! But again it is not a plug and play packet, it can help much and bringing you to running wild too,
if there is a DMZ with opened ports and forwarded protocols it might be the best bet to positioning it there,
if you are not really sure how to use it, I suggest you to get a small amount of books about your favorite
IDS/IPS system such snort and suricata are. That will narrow down the entire time you spend on it.