root@darkstar:~# iptables -t nat -L -nvx
Chain PREROUTING (policy ACCEPT 118 packets, 10381 bytes)
    pkts      bytes target     prot opt in     out     source               destination
       0        0 DNAT       tcp  --  *      *       0.0.0.0/0            10.0.2.13            tcp dpt:1234 to:10.0.2.60:3389

Chain INPUT (policy ACCEPT 104 packets, 9627 bytes)
    pkts      bytes target     prot opt in     out     source               destination

Chain OUTPUT (policy ACCEPT 3 packets, 204 bytes)
    pkts      bytes target     prot opt in     out     source               destination
       0        0 DNAT       tcp  --  *      *       0.0.0.0/0            10.0.2.13            tcp dpt:3389 to:10.0.2.60
       0        0 DNAT       tcp  --  *      lo      0.0.0.0/0            0.0.0.0/0            tcp dpt:1234 to:10.0.2.60:3389

Chain POSTROUTING (policy ACCEPT 3 packets, 204 bytes)
    pkts      bytes target     prot opt in     out     source               destination
       0        0 SNAT       tcp  --  *      *       0.0.0.0/0            10.0.2.60            tcp dpt:3389 to:10.0.2.13