Chapter 14 NAT
NXC5200 User’s Guide
224
replied directly to the LAN user without the traffic going through NAT, the source
would not match the original destination address which would cause the LAN
user’s computer to shut down the session.
Figure 94
LAN to LAN Return Traffic
192.168.1.21
LAN
192.168.1.89
Source 1.1.1.1
SMTP
NAT
Source 192.168.1.21
SMTP