HP ProCurve 2500 Overview of IP Mask Operation

Using Passwords, Port Security, and Authorized IP

Using Passwords, Port Security, and Authorized IP Managers To Protect Against Unauthorized Access

Using IP Authorized Managers

	Overview of IP Mask Operation
	The default IP Mask is 255.255.255.255 and allows switch access only to a
	station having an IP address that is identical to the Authorized Manager IP
	parameter value. (“255” in an octet of the mask means that only the exact value
	in the corresponding octet of the Authorized Manager IP parameter is allowed
	in the IP address of an authorized management station.) However, you can
	alter the mask and the Authorized Manager IP parameter to specify ranges of
	authorized IP addresses. For example, a mask of 255.255.255.0 and any value for
	the Authorized Manager IP parameter allows a range of 0 through 255 in the
	4th octet of the authorized IP address, which enables a block of up to 254 IP
	addresses for IP management access (excluding 0 for the network and 255 for
	broadcasts). A mask of 255.255.255.252 uses the 4th octet of a given Authorized
	Manager IP address to authorize four IP addresses for management station
	access. The details on how to use IP masks are provided under “Building IP
	Masks” on page 7-36.
N o t e	The IP Mask is a method for recognizing whether a given IP address is
	authorized for management access to the switch. This mask serves a different
	purpose than IP subnet masks and is applied in a different manner.

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