Firewall/NAT

I've set firwall rules:

Source : WAN
Protocol : any
Port : any
Destinaton : any

And I try to ping from the internet, there is no reply. I've check the log, it shows my source ipaddress , protocol : icmp blocked(There is a "X" on the ACT coloum).

Could someone plz help me out with this?

With the rule you describe applied to the WAN interface, the WAN IP will respond to pings.

If your WAN is in private IP space you need to uncheck the block private networks box on the WAN page. Other than that, it'll just work if you're using the proper rule and interface.