52
INST
ALLA
TION
CONFIGURA
TION
OPERA
TION
Fur
T
her
INF
orm
A
TI
o
N
INDEX
setting IP
access control
The golden rule with this feature is ‘Include before you exclude’ or to put it another way
‘Arrange
allowed
addresses in the list
before
the
denied
addresses’.
This is because the positions of entries in the list are vitally important. Once a range of
addresses is denied access, it is not possible to make exceptions for particular addresses
within that range. For instance, if the range of addresses from A to F are denied access
first, then the address C could not be granted access lower down the list. Address C
needs to be placed in the list before the denied range.
IMPORTANT: This feature should be configured with extreme caution as it is possible to deny
access to everyone. If such an error occurs, you will need to perform a
reset to factory default
settings
in order to regain access.
To define a new IP access control entry
1 Click the Add button to display a popup dialog:
2 Enter the base network address, the mask and select the appropriate access setting.
3 Click the OK button.
To reorder access control entries
IMPORTANT: When reordering, ensure that any specific allowed addresses are listed higher in
the list than any denied addresses. Take care not to invoke any deny access settings that would
exclude valid users.
1 In the access control list, click on the entry to be moved.
2 Click the Up or Down buttons as appropriate.
To edit/remove access control entries
1 In the access control list, click on the appropriate entry.
2 Click either the Edit or Remove button as appropriate.
Network/Address
Enter the network address
that is to be allowed or denied
access. If a range of addresses is
being specified then specify any
one of the addresses within the
range and use the Mask entry to
indicate the size of the range.
Mask
Enter an IP network mask that
indicates the range of addresses
that are to be allowed or denied
access. For instance, if only a
single specified IP address were
to be required, the mask entry
would be 255.255.255.255 in
order to specify a single location.
Access
Use the arrow buttons
to select either ‘Allow’ or
‘Deny’ as appropriate.
In the list, access control addresses prefixed by ‘+’ are allow entries while those prefixed
by ‘– ‘ are deny entries.
To get here
1 Using VNC viewer or a browser, log on as the ‘admin’ user.
2 Click the ‘Configure’ button in the top right corner.
3 Click the ‘Network Configuration’ option.