The System Configuration Screen; Figure 4-3 Nat Example: One-To-One And Many-To-One; Table 4-4 Nat Example: Many-To-One; Table 4-5 Nat Example: One-To-One And Many-To-One - ZyXEL Communications ZyXEL Vantage VSG-1000 User Manual

SUBSCRIBER
S1
S2
Example 3: One-to-One and Many-to-One
The figure below shows an example where subscriber S1 tires to connect to VPN server V1 while subscriber S2 and
S3 try to connect to the same VPN server V2 at the same time. In this case, subscribers S1 and S2 map to the same
WAN IP address since the destination is different while subscriber S3 maps to a different WAN IP address.
The following table shows the address mapping.
SUBSCRIBER
S1
S2
S3
You only need to set the NAT address pool if the remote VPN server(s) allows only one
You need to acquire additional public IP address(es) from your ISP to create NAT pool(s).

4.8 The System Configuration Screen

From the Main Menu screen, click Configuration and System to display the screen as shown.
System Configuration

Table 4-4 NAT Example: Many-to-One

ORIGINAL SOURCE IP
10.59.1.2
10.59.1.3

Figure 4-3 NAT Example: One-to-One and Many-to-One

Table 4-5 NAT Example: One-to-One and Many-to-One

ORIGINAL SOURCE IP
10.59.1.2
10.59.1.3
10.59.1.4
connection per source IP address.
VSG-1000 Vantage Service Gateway
TRANSLATED SOURCE IP
211.21.21.2
221.21.21.2
TRANSLATED SOURCE IP
211.21.21.2
221.21.21.2
221.21.21.3
4-5