Dell IDRAC6 manual Network Security Page Settings Description

Table 4-9. Network Security Page Settings

Settings	Description
IP Range Enabled	Enables the IP Range checking feature, which defines a range of
	IP addresses that can access the iDRAC. The default is off.
IP Range Address	Determines the acceptable IP address bit pattern, depending
	on the 1's in the subnet mask. This value is bitwise AND’d with
	the IP Range Subnet Mask to determine the upper portion of
	the allowed IP address. Any IP address that contains this bit
	pattern in its upper bits is allowed to establish an iDRAC6
	session. Logins from IP addresses that are outside this range
	will fail. The default values in each property allow an address
	range from 192.168.1.0 to 192.168.1.255 to establish an
	iDRAC6 session.
IP Range Subnet	Defines the significant bit positions in the IP address.
Mask	The subnet mask should be in the form of a netmask, where the
	more significant bits are all 1's with a single transition to all
	zeros in the lower-order bits. The default is 255.255.255.0.
IP Blocking	Enables the IP address blocking feature, which limits the
Enabled	number of failed login attempts from a specific IP address for a
	preselected time span. The default is off.
IP Blocking Fail	Sets the number of login failures attempted from an IP address
Count	before the login attempts are rejected from that address.
	The default is 10.
IP Blocking Fail	Determines the time span in seconds within which IP Block
Window	Fail Count failures must occur to trigger the IP Block Penalty
	Time. The default is 3600.

IP Blocking Penalty The time span in seconds that login attempts from an IP address

Time with excessive failures are rejected. The default is 3600.

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Configuring the iDRAC6 Using the Web Interface