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