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.

.TP

\fB\-\-random\fP

If option

\fB\-\-random\fP

is used then port mapping will be randomized (kernel >= 2.6.22).

.TP

IPv6 support available starting Linux kernels >= 3.7.