So a couple things...
If you are having troiuble with PFSense.. you should put that in the title, there are folks that have security expertise ... your title is just way generic...
I can't really help you with PFSenser but others may.
Beats->Logstash->Elasticsearch I can 
It talks about the archticture and provides a sample logstash.conf that acts as a pass through and you can work from there.
And of course if you want help... posting your configs (filebeat, logsash etc) will help otherwise we are just guessing the more you give us, good titles, sample configs etc. the more we can help.
I will say when you use giudes from other sources.. it is harder... we help with the Elastic Stack perhaps you could also get specific help on that integration from that community