ZyXEL Communications 200 Series User Manual

Chapter 16 Virtual Servers

ZyWALL USG 100/200 Series User’s Guide

Original IP

Use the drop-down list box to indicate which destination IP address this virtual 
server supports. Choices are:
Any - this virtual server supports the IP address of the selected interface.
User Defined - this virtual server supports a specific IP address, specified in the 
User Defined field.
HOST address - the drop-down box lists all the HOST address objects in the 
ZyWALL. If you select one of them, this virtual server supports the IP address 
specified by the address object.
Select Create Object to configure a new IP address object.

User Defined 
Original IP

This field is available if Original IP is User Defined. Type the destination IP 
address that this virtual server supports.

Mapped IP

Use the drop-down list box to indicate to which translated destination IP address 
this virtual server forwards the packet. Choices are:
User Defined - this virtual server supports a specific IP address, specified in the 
User Defined field.
HOST address - the drop-down box lists all the HOST address objects in the 
ZyWALL. If you select one of them, this virtual server supports the IP address 
specified by the address object.
Select Create Object to configure a new IP address object.

User Defined 
Original IP

This field is available if Mapped IP is User Defined. Type the translated destination 
IP address that this virtual server supports.

Port Mapping 
Type

Use the drop-down list box to select how many original destination ports this virtual 
server supports for the selected destination IP address (Original IP). Choices are:
Any - this virtual server supports all the destination ports.
Port - this virtual server supports one destination port.
Ports - this virtual server supports a range of destination ports. You might use a 
range of destination ports for unknown services or when one server supports more 
than one service. 
See 

 for some common port numbers.

Protocol Type

This field is available if Mapping Type is Port or Ports. Select the protocol (TCP, 
UDP, or Any) used by the service requesting the connection.

Original Port

This field is available if Mapping Type is Port. Enter the original destination port 
this virtual server supports.

Mapped Port

This field is available if Mapping Type is Port. Enter the translated destination port 
if this virtual server forwards the packet.

Original Start 
Port

This field is available if Mapping Type is Ports. Enter the beginning of the range of 
original destination ports this virtual server supports.

Original End Port

This field is available if Mapping Type is Ports. Enter the end of the range of 
original destination ports this virtual server supports.

Mapped Start 
Port

This field is available if Mapping Type is Ports. Enter the beginning of the range of 
translated destination ports if this virtual server forwards the packet.

Mapped End 
Port

This field is available if Mapping Type is Ports. Enter the end of the range of 
translated destination ports if this virtual server forwards the packet. The original 
port range and the mapped port range must be the same size.

Add 
corresponding 
Policy Route rule 
for NAT 1:1 
mapping.

If the server will initiate sessions to the clients, select this check box to create a 
corresponding policy route so the ZyWALL uses the same public IP address as the 
traffic’s source address. This is called NAT 1:1. 
Or you can click Policy Route to go to the screens where you can manually 
configure a NAT 1:1 policy route for this virtual server.
See 

 for an example of NAT 1:1.

Table 105   Network > Virtual Server > Edit (continued)