root@OpenWrt:~# iptables -t nat -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         
prerouting_rule  all  --  anywhere             anywhere            
zone_lan_prerouting  all  --  anywhere             anywhere            
zone_wan_prerouting  all  --  anywhere             anywhere            
DNAT       all  --  anywhere             anywhere            to:192.168.5.100 

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination         
postrouting_rule  all  --  anywhere             anywhere            
zone_lan_nat  all  --  anywhere             anywhere            
zone_wan_nat  all  --  anywhere             anywhere            

Chain postrouting_rule (1 references)
target     prot opt source               destination         

Chain prerouting_lan (1 references)
target     prot opt source               destination         

Chain prerouting_rule (1 references)
target     prot opt source               destination         

Chain prerouting_wan (1 references)
target     prot opt source               destination         

Chain zone_lan_nat (1 references)
target     prot opt source               destination         

Chain zone_lan_prerouting (1 references)
target     prot opt source               destination         
prerouting_lan  all  --  anywhere             anywhere            

Chain zone_wan_nat (1 references)
target     prot opt source               destination         
MASQUERADE  all  --  anywhere             anywhere            

Chain zone_wan_prerouting (1 references)
target     prot opt source               destination         
prerouting_wan  all  --  anywhere             anywhere