--- /dev/null
+This module matches the netfilter mark field associated with a packet
+(which can be set using the
+.B MARK
+target below).
+.TP
+.BR "--mark " "\fIvalue\fP[/\fImask\fP]"
+Matches packets with the given unsigned mark value (if a mask is
+specified, this is logically ANDed with the mask before the
+comparison).