DNAT

[sims]

Hi,
I have the below    setup 
port1

ip add 192.168.1.1 /24

port2

ip add 192.168.2.1 /24


static route
192.168.5.0/24 gw port1



address 192.168.5.0/24

vitrual ip nat
external ip 192.168.5.20
mapped ip 192.168.2.20


firewall policy
incoming interface
port2
outgoing interface
port1

source all , destination all ,service allQ, i WANT TO 

I want to initiate traffic from port1  VLAN  to 192.168.5.0/24. so how my pplicy should look like 

Thanks