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HP 4108GL User Manual

HP 4108GL
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10-11
Using Authorized IP Managers for Increased Management Security
Using Authorized IP Managers
Using Authorized IP
Managers
Table 10-2. Analysis of IP Mask for Single-Station Entries
Configuring Multiple Stations Per Authorized Manager IP
Entry
The mask determines whether the IP address of a station on the network meets
the criteria you specify. That is, for a given Authorized Manager entry, the
switch applies the IP mask to the IP address you specify to determine a range
of authorized IP addresses for management access. As described above, that
range can be as small as one IP address (if 255 is set for all octets in the mask),
or can include multiple IP addresses (if one or more octets in the mask are set
to less than 255).
If a bit in an octet of the mask is on (set to 1), then the corresponding bit in
the IP address of a potentially authorized station must match the same bit in
the IP address you entered in the Authorized Manager IP list. Conversely, if a
bit in an octet of the mask is off (set to 0), then the corresponding bit in the
IP address of a potentially authorized station on the network does not have to
match its counterpart in the IP address you entered in the Authorized Manager
IP list. Thus, in the example shown above, a 255 in an IP Mask octet (all bits
in the octet are on) means only one value is allowed for that octetthe value
you specify in the corresponding octet of the Authorized Manager IP list. A 0
(all bits in the octet are off) means that any value from 0 to 255 is allowed
in the corresponding octet in the IP address of an authorized station. You can
also specify a series of values that are a subset of the 0-255 range by using a
value that is greater than 0, but less than 255.
1st
Octet
2nd
Octet
3rd
Octet
4th
Octet
Manager-Level or Operator-Level Device Access
IP Mask 255 255 255 255 The 255 in each octet of the mask specifies that only the exact value in
that octet of the corresponding IP address is allowed. This mask allows
management access only to a station having an IP address of 10.33.248.5.
Authorized
Manager IP
10 28 227 125

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HP 4108GL Specifications

General IconGeneral
BrandHP
Model4108GL
CategorySwitch
LanguageEnglish

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