1This target is only valid in the \fBmangle\fP table, in the \fBPREROUTING\fP 2chain and user-defined chains which are only called from this chain. It 3redirects the packet to a local socket without changing the packet header in 4any way. It can also change the mark value which can then be used in advanced 5routing rules. 6It takes three options: 7.TP 8\fB\-\-on\-port\fP \fIport\fP 9This specifies a destination port to use. It is a required option, 0 means the 10new destination port is the same as the original. This is only valid if the 11rule also specifies \fB\-p tcp\fP or \fB\-p udp\fP. 12.TP 13\fB\-\-on\-ip\fP \fIaddress\fP 14This specifies a destination address to use. By default the address is the IP 15address of the incoming interface. This is only valid if the rule also 16specifies \fB\-p tcp\fP or \fB\-p udp\fP. 17.TP 18\fB\-\-tproxy\-mark\fP \fIvalue\fP[\fB/\fP\fImask\fP] 19Marks packets with the given value/mask. The fwmark value set here can be used 20by advanced routing. (Required for transparent proxying to work: otherwise 21these packets will get forwarded, which is probably not what you want.) 22