.PP
Attempt to detect TCP and UDP port scans. This match was derived from
Solar Designer's scanlogd.
.TP
\fB\-\-psd\-weight\-threshold\fP \fIthreshold\fP
Total weight of the latest TCP/UDP packets with different
destination ports coming from the same host to be treated as port
scan sequence.
.TP
\fB\-\-psd\-delay\-threshold\fP \fIdelay\fP
Delay (in hundredths of second) for the packets with different
destination ports coming from the same host to be treated as
possible port scan subsequence.
.TP
\fB\-\-psd\-lo\-ports\-weight\fP \fIweight\fP
Weight of the packet with privileged (<=1024) destination port.
.TP
\fB\-\-psd\-hi\-ports\-weight\fP \fIweight\fP
Weight of the packet with non-priviliged destination port.