Draytek Vigor IPPBX 2820 Series User Manual page 266

Interface
Address Type
Start IP Address
End IP Address
Subnet Mask
Invert Selection
Below is an example of IP objects settings.
allowed.
Choose a proper interface (WAN, LAN or Any).
For example, the Direction setting in Edit Filter Rule will ask
you specify IP or IP range for WAN or LAN or any IP address.
If you choose LAN as the Interface here, and choose LAN as
the direction setting in Edit Filter Rule, then all the IP
addresses specified with LAN interface will be opened for you
to choose in Edit Filter Rule page.
Determine the address type for the IP address.
Select Single Address if this object contains one IP address
only.
Select Range Address if this object contains several IPs within
a range.
Select Subnet Address if this object contains one subnet for IP
address.
Select Any Address if this object contains any IP address.
Type the start IP address for Single Address type.
Type the end IP address if the Range Address type is selected.
Type the subnet mask if the Subnet Address type is selected.
If it is checked, all the IP addresses except the ones listed
above will be applied later while it is chosen.
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VigorIPPBX 2820 Series User's Guide