UPnP Multi-WAN

The following script will clone UPnP entries from WAN1 to WAN2:

Schedule NAT entry cloning every few minutes:

(set <WAN2 IP> manually)

foreach i in=([/ip fi nat find dynamic]) do={/ip fi nat add chain=dst-nat dst-address="<WAN2 IP>" protocol=[/ip fi nat get $i protocol] to-addresses=[/ip fi nat get $i to-addresses] to-ports=[/ip fi nat get $i to-ports] action=dst-nat dst-port=[/ip fi nat get $i dst-port] comment="UPnP_Cloned"}

Schedule cloned NAT entry removing every other night:

/ip firewall nat remove [/ip firewall nat find comment="UPnP_Cloned"]