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These extensions can be used if `--protocol udp' is specified.  It
provides the following options:
.TP
[\fB!\fP] \fB--source-port\fP,\fB--sport\fP \fIport\fP[\fB:\fP\fIport\fP]
Source port or port range specification.
See the description of the
.B --source-port
option of the TCP extension for details.
.TP
[\fB!\fP] \fB--destination-port\fP,\fB--dport\fP \fIport\fP[\fB:\fP\fIport\fP]
Destination port or port range specification.
See the description of the
.B --destination-port
option of the TCP extension for details.