Firewall Tutorial
Less Than: For the filter to match, the packet's port number must be less than the port
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number specified in the filter.
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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
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specified in the filter.
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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
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greater than or equal to the port number specified in the filter.
Other filter attributes
There are three other attributes to each filter:
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The filter's order (i.e., priority) in the filter set
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Whether the filter is currently active
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Whether the filter is set to forward packets or to block (discard) packets
Putting the parts together
When you display a filter set, its filters are displayed as rows in a table:
The table's columns correspond to each filter's attributes:
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#: The filter's priority in the set. Filter number 1, with the highest priority, is first in the
table.
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