In order to route packets originating from the host itself based on
fwmark, mangle table's OUTPUT chain must be used. Mention this chain as
alternative to PREROUTING.
Fixes: c9be7f153f7bf ("doc: libxt_MARK: no longer restricted to mangle table")
Signed-off-by: Phil Sutter <phil@nwl.cc>
This target is used to set the Netfilter mark value associated with the packet.
It can, for example, be used in conjunction with routing based on fwmark (needs
-iproute2). If you plan on doing so, note that the mark needs to be set in the
-PREROUTING chain of the mangle table to affect routing.
+iproute2). If you plan on doing so, note that the mark needs to be set in
+either the PREROUTING or the OUTPUT chain of the mangle table to affect routing.
The mark field is 32 bits wide.
.TP
\fB\-\-set\-xmark\fP \fIvalue\fP[\fB/\fP\fImask\fP]