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| Note | ||
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The rejected packet are discarded without notification to the sender. |
Packet filtering rules
Every packet entering a router passes through a set of input filters (blocking filters). The packets accepted by the input filter set are further processed by the IP layer of the router kernel. If the IP layer determines that the packet should go further and not landing here, it hands the packet to the set of outgoing filters (forwarding filters).
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- If the filter set is empty, the packet is accepted
- Otherwise, the first matching filter decides what to do with the packet. If it is an accept filter, the packet is accepted. If it’s a reject filter, the packet is rejected (discarded)
- If no filter has been found that matches the packet, it is accepted.
IP Firewall parameters
In the "IP Firewall parameters" section, you can view the IP Firewall rules that are already created; you can create a new rule for the current switch group by clicking the "Add Rule" button, or you can permanently remove the rule from the configuration by clicking the "Remove Rule" button.
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