PLANET VIP-2020PT - Manual (Page 99)

Enterprise HD PoE IP Phone
VIP-2020PT
Des Address
Set the destination address. It can be IP address, network
address, complete address 0.0.0.0, or network address similar to
*.*.*.*.
Src Mask
Set the source address’ mask. For example, 255.255.255.255
means just point to one host; 255.255.255.0 means point to a
network which network ID is C type.
Dest Mask
Set the destination address’ mask. For example,
255.255.255.255 means just point to one host; 255.255.255.0
means point to a network which network ID is C type.
Click the Add button if User wants to add a new output rule.
Then enable out access, and click the Apply button.
So when devices execute to ping 192.168.1.118, system will deny the request to send icmp
request to 192.168.1.118 for the out access rule. But if devices ping other devices which
network ID is 192.168.1.0, it will be normal.
Click the Delete button to delete the selected rule.
8.3.7.3 NAT
NAT is abbreviated from Net Address Translation; it’s a protocol responsible for IP address
translation. In other word, it is responsible for transforming IP and port of private network to
public, also is the IP address mapping which we usually say.
DMZ config:
In order to make some intranet equipment support better service for extranet, and make internal
network security more effectively, these equipment open to extranet need be separated from the
other equipment not open to extranet by the corresponding isolation method according to