Filter
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Security 7-11
Port number comparisons
A filter can also use a comparison option to evaluate a packet’s
source or destination port number. The comparison options are:
No Compare: No comparison of the port number specified in the
filter with the packet’s port number.
Not Equal To: For the filter to match, the packet’s port number
cannot equal the port number specified in the filter.
Less Than: For the filter to match, the packet’s port number must
be less than the port number specified in the filter.
Less Than or Equal: For the filter to match, the packet’s port
number must be less than or equal to the port number specified in
the filter.
Equal: For the filter to match, the packet’s port number must equal
the port number specified in the filter.
Greater Than: For the filter to match, the packet’s port number
must be greater than the port number specified in the filter.
Greater Than or Equal: For the filter to match, the packet’s port
number must be greater than or equal to the port number specified
in the filter.
Internet service UDP port Internet service UDP port
Who Is 43 AppleTalk Routing
Maintenance (at-rtmp)
202
World Wide Web 80 AppleTalk Name Binding
(at-nbp)
202
SNMP 161 AURP (AppleTalk) 387
TFTP 69 who 513