NETGEAR GS724TS-100NAS manual Denial of Service, Auto-DoS Configuration

GS716Tv2 and GS724Tv3 Software Administration Manual

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Denial of Service

Use the Denial of Service (DoS) page to configure DoS control. The switch software provides support for classifying and blocking specific types of DoS attacks. You can configure your system to monitor and block six types of attacks:

•SIP=DIP: Source IP address = Destination IP address.

•First Fragment: TCP Header size is smaller than the configured value.

•TCP Fragment: IP Fragment Offset = 1.

•TCP Flag: TCP Flag SYN set and Source Port < 1024 or TCP Control Flags = 0 and TCP Sequence Number = 0 or TCP Flags FIN, URG, and PSH set and TCP Sequence Number = 0 or TCP Flags SYN and FIN set.

•L4 Port: Source TCP/UDP Port = Destination TCP/UDP Port.

•ICMP: Limiting the size of ICMP Ping packets.

Auto-DoS Configuration

The Auto-DoS Configuration page lets you automatically enable all the DoS features available on the switch, except for the L4 Port attack. See the previous section for information about the types of DoS attacks the switch can monitor and block.

Note: When Auto-DoS is enabled, a port that is under attack is automatically shut down and does not forward traffic

To access the Auto-DoS Configuration page, click System > Management > Denial of Service > Auto-DoS Configuration.

Chapter 2: Configuring System Information 41