CONFIGURATION
Page 54
User manual ref. 9017009-02
3G-GPRS-EDGE router IPL-G12
15 Address and port translation
The IPL-G12 provides the capability to replace the original source IP
address and the destination port and IP address in particular situations.
15.1 Port forwarding (DNAT)
The port forwarding function consists in transferring to a particular
device connected to the LAN interface a particular data flow addressed
to the IPL-G12 router on its wireless interface.
That function applies only to the IP frames sent to the wireless IP
address of the router.
The transfer criteria is the port number used as an additional address
field.
When a frame is addressed to the IPL-G12 router on a particular port, it
is transferred to a particular device connected to the LAN interface.
Example :
Suppose a remote device has to communicate with the
devices PLC1 with TCP port 102, PLC2 with TCP port 502 and a PC port
80.
PLC1 192.168.0.15
TCP : 102
PLC2 192.168.0.16
TCP : 502
PC 192.168.0.17
TCP : 80
GSM
INTERNET
The DNAT rule will be
Internet / WAN
LAN translation
Service Device
Service
TCP-102 192.168.0.15
TCP-102
TCP-502 192.168.0.16
TCP-502
TCP-80 192.168.0.17
TCP-80
•
To set the DNAT rules, select the “Internet” menu and then the
“Routing” menu.