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