This attribute specifies the TCP or UDP port number or range of
port numbers of which the policy applies. The port numbers
specified here are used to match the source or destination port
number of any incoming packet. The exact matching algorithm is
defined by the flow component that uses this attribute group.
To specify a port number to match, just enter the value. To specify a
range of port numbers to match, enter the lower and upper bound of
the range. The order in which the lower and upper bound are
entered does not matter.
Not setting this attribute or setting the port number to 0 means any
port number.