This is used to set the netfilter mark value associated with the
packet.  It is only valid in the
.B mangle
table.  It can for example be used in conjunction with iproute2.
.TP
.BI "--set-mark " "value"
Set nfmark value
.TP
.BI "--and-mark " "value"
Binary AND the nfmark with value
.TP
.BI "--or-mark " "value"
Binary OR  the nfmark with value