Table of Contents
Advertisement
M2M Cellular Gateway
Configuration Path
ID
Public Port
Server IP
Private Port
Rule
Scenario Operation Procedure
In above diagram, the Gateway is the gateway of Network‐A and the subnet of its
Intranet is 10.0.75.0/24. The gateway has the IP address of 10.0.75.2 for LAN interface
and 118.18.81.33 for WAN interface. It serves as a NAT router.
Activate the NAT Loopback feature on the Gateway.
Define the E‐mail virtual server to be located at a server with IP address 10.0.75.101 in
the Intranet of Network‐A, including SMTP service port 25 and POP3 service port 110.
So, the local user at host with IP address 10.0.75.100 can access the E‐mail server by
using the global IP 118.18.81.33. But in reality the E‐mail request packets from the local
host will not reach the WAN interface, but just loop back to the E‐mail server in the
Intranet.
The NAT Loopback allows user to access the WAN IP address from inside your local network.
Enable NAT Loopback
Go to Basic Network > NAT / Bridging > Configuration tab
Configuration
Item
Value setting
The box is checked by
NAT Loopback
default
Save
N/A
Undo
N/A
Index skipping is used to reserve slots for new function insertion, when required.
[Virtual Server & Virtual Computer]‐[Virtual Server List]
1
25 (SMTP)
10.0.75.101
25 (SMTP)
■ Enable
Description
Check the Enable box to activate this NAT function
Click the Save button to save the settings.
Click Undo to cancel the settings
2
110 (POP3)
10.0.75.101
110 (POP3)
■ Enable
90
Advertisement
Table of Contents
