iptables -t nat I PREROUTING -i lan0 -d 80.108.xx.yy -p tcp --match multiport --dport 9987,30033,10011 -j DNAT --to-destination 10.0.0.7iptables -t nat I POSTROUTING -o lan0 -s 10.0.0.0/16 -d 10.0.0.7 -p tcp --match multiport --dport 9987,30033,10011 -j SNAT --to-source 80.108.xx.yy
In case of a port range, specify the beginning port of the range (the end port will be calculated automatically).