ZyXEL Communications ZyWall USG20-VPN, Руководство пользователя

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Chapter 12 NAT
USG20(W)-VPN Series User’s Guide
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Classification Select what kind of NAT this rule is to perform.
Virtual Server - This makes computers on a private network behind the USG
available to a public network outside the USG (like the Internet).
1:1 NAT - If the private network server will initiate sessions to the outside clients,
select this to have the USG translate the source IP address of the server’s outgoing
traffic to the same public IP address that the outside clients use to access the server.
Many 1:1 NAT - If you have a range of private network servers that will initiate
sessions to the outside clients and a range of public IP addresses, select this to have
the USG translate the source IP address of each server’s outgoing traffic to the same
one of the public IP addresses that the outside clients use to access the server. The
private and public ranges must have the same number of IP addresses.
One many 1:1 NAT rule works like multiple 1:1 NAT rules, but it eases configuration
effort since you only create one rule.
Incoming Interface Select the interface on which packets for the NAT rule must be received. It can be an
Ethernet, VLAN, bridge, or PPPoE/PPTP interface.
Original IP Specify the destination IP address of the packets received by this NAT rule’s specified
incoming interface.
any - Select this to use all of the incoming interface’s IP addresses including dynamic
addresses or those of any virtual interfaces built upon the selected incoming interface.
User Defined - Select this to manually enter an IP address in the User Defined field.
For example, you could enter a static public IP assigned by the ISP without having to
create a virtual interface for it.
Host address - select a host address object to use the IP address it specifies. The list
also includes address objects based on interface IPs. So for example you could select
an address object based on a WAN interface even if it has a dynamic IP address.
User Defined
Original IP This field is available if Original IP is User Defined . Type the destination IP address
that this NAT rule supports.
Original IP Subnet/
Range This field displays for Many 1:1 NAT. Select the destination IP address subnet or IP
address range that this NAT rule supports. The original and mapped IP address
subnets or ranges must have the same number of IP addresses.
Mapped IP Select to which translated destination IP address this NAT rule forwards packets.
User Defined - this NAT rule 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 USG. If
you select one of them, this NAT rule supports the IP address specified by the address
object.
User Defined
Original IP This field is available if Mapped IP is User Defined . Type the translated destination
IP address that this NAT rule supports.
Mapped IP Subnet/
Range This field displays for Many 1:1 NAT . Select to which translated destination IP address
subnet or IP address range this NAT rule forwards packets. The original and mapped IP
address subnets or ranges must have the same number of IP addresses.
Table 105
Configuration > Network > NAT > Add (continued)
LABEL DESCRIPTION