1This target is only valid in the
2.B nat
3table, in the
4.B PREROUTING
5and
6.B OUTPUT
7chains, and user-defined chains which are only called from those
8chains.  It redirects the packet to the machine itself by changing the
9destination IP to the primary address of the incoming interface
10(locally-generated packets are mapped to the 127.0.0.1 address).
11.TP
12\fB\-\-to\-ports\fP \fIport\fP[\fB\-\fP\fIport\fP]
13This specifies a destination port or range of ports to use: without
14this, the destination port is never altered.  This is only valid
15if the rule also specifies
16\fB\-p tcp\fP
17or
18\fB\-p udp\fP.
19.TP
20\fB\-\-random\fP
21If option
22\fB\-\-random\fP
23is used then port mapping will be randomized (kernel >= 2.6.22).
24.RS
25.PP
26