Blocking port space and address space attacks

Other methods that attackers use to gain access to networks and hosts are known as probes. Port space probes are used to scan a host to find what services are running on it. Address space probes scan a network to see which services are running on the hosts inside that network. From Policy Manager:

On the toolbar, click the Default Packet Handling icon.

You can also, from Policy Manager, select Setup => Intrusion Prevention => Default Packet Handling.

The Default Packet Handling dialog box appears.
Enable the checkbox marked Block Port Space Probes.
Enable the checkbox marked Block Address Space Probes.

Related topics:

Default Packet Handling

Blocking spoofing attacks

Stopping IP options attacks

Stopping SYN Flood attacks

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