CLI Ping getting failed results

Gazoo271

CLI Command on Zyxel USG Flex 200 not getting results I should
The LAN IP is 172.16.24.1
I can ping 8.8.8.8 from the Gui Diags, but when I go to the CLI and use this command it does not work

ping 8.8.8.8 source 192.16.24.1 (It fails all 3 packets)
OR
ping 8.8.8.8 source 192.16.24.1 interface wan1 (It fails all 3 packets)
OR
ping 8.8.8.8 source 192.16.24.1 interface eth2 (It fails all 3 packets) )eth2 is wan1 Interface)

Zyxel_Cooldia

Hi @Gazoo271,

Welcome to Zyxel community.  
Is this IP 192.16.24.1 FLEX200 wan interface I P? and it can be routed to Internet by your ISP?

EDIT: 
BTW, it is unable ping to Internet from firewall internal interface IP.