i think is internal problem 192.168.3.x ->192.168.5.x. Because When i open the server share folder, i need to wait for 10 second to open it. If i try to disable the Pfsense firewall, the speed will back to normal (faster).
IF i change the Pfsense LAN IP & my pc IP to 192.168.5.x, example from 192.168.5.x ->192.168.5.x. The speed will like normal, very fast.
I'm using Juniper SSG320M Firewall & HP Procurve Managed Switch.
According to the Status Traffic Graph From Pfsense, In & Out traffic average below 50 Kbps
Ping Result - From 192.168.3.x to 192.168.5.x
---Reply from 192.168.5.1: bytes=32 time=1ms TTL=64
---Reply from 192.168.5.1: bytes=32 time<1ms TTL=64