ServSwitch Agility Dual with VNC
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Page 60
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.
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.
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.
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 define a new IP access control entry
1 Click the Add button to display a popup dialog:
