D-Link NetDefendOS User Manual page 850

Chapter 13: Advanced Settings
attack to be based on illegal checksums.
Default: Enabled
Log non IPv4/IPv6
Logs occurrences of IP packets that are not IPv4 or IPv6.
Default: Enabled
Log Received TTL 0
Logs occurrences of IP packets received with the "Time To Live" (TTL) value set to zero. Under no
circumstances should any network unit send packets with a TTL of 0.
Default: Enabled
Block 0000 Src
Block 0.0.0.0 as source address.
Default: Drop
Block 0 Net
Block 0.* as source addresses.
Default: DropLog
Block 127 Net
Block 127.* as source addresses.
Default: DropLog
Block Multicast Src
Block multicast both source addresses (224.0.0.0 - 255.255.255.255).
Default: DropLog
TTL Min
The minimum TTL value accepted on receipt.
Default: 3
TTL on Low
Determines the action taken on packets whose TTL falls below the stipulated TTLMin value.
Default: DropLog
850