Figure 228 Create A Policy Route; Figure 229 Nat Loopback Successful - ZyXEL Communications ZyWALL USG 100 Series User Manual

Chapter 16 Virtual Servers

Figure 228 Create a Policy Route

Now the LAN1 SMTP server replies to the ZyWALL's LAN1 IP address and the ZyWALL
changes the source address to 1.1.1.1 before sending it to the LAN1 user's computer. The
source in the return traffic matches the original destination address (1.1.1.1) and the LAN1
user can use the LAN1 SMTP server.

Figure 229 NAT Loopback Successful

Source 192.168.1.21
Source 1.1.1.1
SMTP
SMTP
LAN
192.168.1.21 192.168.1.89
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