This target is only valid in the
.B nat
table, in the
.B PREROUTING
and
.B OUTPUT
chains, and user-defined chains which are only called from those
chains.  It redirects the packet to the machine itself by changing the
destination IP to the primary address of the incoming interface
(locally-generated packets are mapped to the localhost address,
127.0.0.1 for IPv4 and ::1 for IPv6, and packets arriving on
interfaces that don't have an IP address configured are dropped).
.TP
\fB\-\-to\-ports\fP \fIport\fP[\fB\-\fP\fIport\fP]
This specifies a destination port or range of ports to use: without
this, the destination port is never altered.  This is only valid
if the rule also specifies one of the following protocols:
\fBtcp\fP, \fBudp\fP, \fBdccp\fP or \fBsctp\fP.
For a single port, a service name as listed in \fB/etc/services\fP may be used.
.TP
\fB\-\-random\fP
Randomize source port mapping (kernel >= 2.6.22).
.TP
IPv6 support available starting Linux kernels >= 3.7.
