Dell PowerEdge M420 Dell PowerConnect M6220/M6348/M8024/M8024-k CLI Referen - Page 1367
dos-control firstfrag, Syntax, Default Configuration, Command Mode, User Guidelines, Example, dos-
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dos-control firstfrag Use the dos-control firstfrag command in Global Configuration mode to enable Minimum TCP Header Size Denial of Service protection. If the mode is enabled, Denial of Service prevention is active for this type of attack. If packets ingress having a TCP Header Size smaller than the configured value, the packets are dropped. Syntax dos-control firstfrag [size] no dos-control firstfrag • size -TCP header size. (Range: 0-255). The default TCP header size is 20. ICMP packet size is 512. Default Configuration Denial of Service is disabled. Command Mode Global Configuration mode User Guidelines This command has no user guidelines. Example The following example defines a minimum TCP header size of 20. Packets entering with a smaller header size are dropped. console(config)#dos-control firstfrag 20 dos-control icmp Use the dos-control icmp command in Global Configuration mode to enable Maximum ICMP Packet Size Denial of Service protections. If the mode is enabled, Denial of Service prevention is active for this type of attack. If ICMP Echo Request (PING) packets ingress having a size greater than the configured value, the packets are dropped. Denial of Service Commands 1363
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