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+This module copies security markings from packets to connections
+(if unlabeled), and from connections back to packets (also only
+if unlabeled). Typically used in conjunction with SECMARK, it is
+only valid in the
+.B mangle
+table.
+.TP
+.B --save
+If the packet has a security marking, copy it to the connection
+if the connection is not marked.
+.TP
+.B --restore
+If the packet does not have a security marking, and the connection
+does, copy the security marking from the connection to the packet.
+