[root@pre /]# iptables -t nat -A PREROUTING -s 39.15.15.15/32 -d 221.11.8.200/32 -p tcp -m tcp --dport 9999 -j DNAT --to-destination 192.168.1.215:80

[root@pre /]# iptables -t nat -A OUTPUT -p tcp -m tcp --dport 9999 -j DNAT --to-destination 192.168.1.215:80

[root@pre /]# iptables -t nat -L -n

Chain PREROUTING (policy ACCEPT)

target     prot opt source               destination

DNAT       tcp  --  39.15.15.15       221.11.8.200      tcp dpt:9999 to:192.168.1.215:80

Chain POSTROUTING (policy ACCEPT)

target     prot opt source               destination        

Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination

DNAT       tcp  --  0.0.0.0/0            0.0.0.0/0           tcp dpt:9999 to:192.168.1.215:80

[root@pre /]# iptables -t nat -D PREROUTING -s 39.15.15.15/32 -d 221.11.8.200/32 -p tcp -m tcp --dport 9999 -j DNAT --to-destination 192.168.1.215:80

[root@pre /]# iptables -t nat -D OUTPUT -p tcp -m tcp --dport 9999 -j DNAT --to-destination 192.168.1.215:80

[root@pre /]# iptables -t nat -L -n

Chain PREROUTING (policy ACCEPT)

target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)

target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)

target     prot opt source               destination