Defining Authorized Management Stations; Overview Of Ip Mask Operation - HP procurve 5300xl Series Access Security Manual

Using Authorized IP Managers

Defining Authorized Management Stations

10-4
Defining Authorized Management
Stations
Authorizing Single Stations: The table entry authorizes a single
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management station to have IP access to the switch. To use this
method, just enter the IP address of an authorized management
station in the Authorized Manager IP column, and leave the IP Mask
set to 255.255.255.255. This is the easiest way to use the Authorized
Managers feature. (For more on this topic, see "Configuring One
Station Per Authorized Manager IP Entry" on page 10-9.)
Authorizing Multiple Stations: The table entry uses the IP Mask
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to authorize access to the switch from a defined group of stations.
This is useful if you want to easily authorize several stations to have
access to the switch without having to type in an entry for every
station. All stations in the group defined by the one Authorized
Manager IP table entry and its associated IP mask will have the same
access level—Manager or Operator. (For more on this topic, refer to
"Configuring Multiple Stations Per Authorized Manager IP Entry" on
page 10-10.)
To configure the switch for authorized manager access, enter the appropriate
Authorized Manager IP value, specify an IP Mask, and select either Manager
or Operator for the Access Level. The IP Mask determines how the Authorized
Manager IP value is used to allow or deny access to the switch by a manage­
ment station.

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 Autho-