ZyXEL Communications USG-300 - V2.20 ED 2, Manual

Page: 486 / 1149

Chapter 25 IPSec VPN
ZyWALL USG 300 User’s Guide
486
Inbound Traffic
Source NAT This translation hides the source address of computers in the remote
network.
Source Select the address object that represents the original source address
(or select
Create Object to configure a new one). This is the address
object for the remote network. The size of the original source address
range (
Source ) must be equal to the size of the translated source
address range ( SNAT ).
Destination Select the address object that represents the original destination
address (or select
Create Object to configure a new one). This is the
address object for the local network.
SNAT Select the address object that represents the translated source
address (or select
Create Object to configure a new one). This is the
address that hides the original source address. The size of the original
source address range (
Source ) must be equal to the size of the
translated source address range ( SNAT ).
Destination
NAT
This translation forwards packets (for example, mail) from the remote
network to a specific computer (for example, the mail server) in the
local network.
Add Click this to create a new entry. Select an entry and click Add to
create a new entry after the selected entry.
Edit Select an entry and click this to be able to modify it.
Remove Select an entry and click this to delete it.
Move To change an entry’s position in the numbered list, select it and click
Move to display a field to type a number for where you want to put
that entry and press [ENTER] to move the entry to the number that
you typed.
# This field is a sequential value, and it is not associated with a specific
NAT record. However, the order of records is the sequence in which
conditions are checked and executed.
Original IP Select the address object that represents the original destination
address. This is the address object for the remote network.
Mapped IP Select the address object that represents the desired destination
address. For example, this is the address object for the mail server.
Protocol Select the protocol required to use this translation. Choices are: TCP ,
UDP , or All .
Original Port
Start / Original
Port End
These fields are available if the protocol is TCP or UDP . Enter the
original destination port or range of original destination ports. The
size of the original port range must be the same size as the size of
the mapped port range.
Mapped Port
Start / Mapped
Port End
These fields are available if the protocol is TCP or UDP . Enter the
translated destination port or range of translated destination ports.
The size of the original port range must be the same size as the size
of the mapped port range.
OK Click OK to save the changes.
Cancel Click Cancel to discard all changes and return to the main VPN
screen.
Table 128 Configuration > VPN > IPSec VPN > VPN Connection > Edit (continued)
LABEL DESCRIPTION