@stephenw10 Thank you. I have moved in similar lines, but it seems
I have to configure a Gateway. This may be in contrast to what pfsense said in the field text "On local area network interfaces the upstream gateway should be "none"", I assumed ,I don't need to create a Upstream gateway. So i've created this
Also, after creating the gateway, I've changed the Fireall -> NAT -> Outbound to Automatic outbound NAT rule generation.
These two changes made it work. Thanks again