The packet filters allow the administrator to permit or deny the communication based on the following criteria:
1. the physical network interface that the packet arrives on.
2. the source IP address.
3. the destination IP address.
4. the type of transport layer.
5. the transport layer source port.
6. the transport layer destination port.
1. the physical network interface that the packet arrives on.
2. the source IP address.
3. the destination IP address.
4. the type of transport layer.
5. the transport layer source port.
6. the transport layer destination port.
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