@popquiz so with your any rule on lan.. There should be no reason you should not be able to talk to anything on opt2 no matter what the IP is.
Your saying from device on lan you can ping opt2 pfsense address 204.150.150.145?
But you can not ping a device on this network, say .146
Can pfsense itself ping this .146 address?
If so I would suggest a sniff - from your lan device get a ping going to the .146 address, do you see pfsense sending that out on opt2?
You can do a simple packet capture under the diagnostic menu, on the opt2 interface. If you see traffic going out the opt2 interface.. But no response - that points to this opt2 device not pointing to pfsense .145 address as its gateway. Or it is running a firewall.