Chapter 16 Virtual Servers

Figure 227 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 228 NAT Loopback Successful

 

 

 

NAT

Source 192.168.1.21

Source 1.1.1.1

 

SMTP

 

 

SMTP

 

LAN1

192.168.1.21192.168.1.89

320

 

ZyWALL USG 100/200 Series User’s Guide