L-IP User Manual
91
LOYTEC
Version 6.1
LOYTEC electronics GmbH
Specify the gateway address (e.g. 192.168.1.1),
Specify the NAT address (public IP address: 135.23.2.1) or use automatic NAT router
discovery,
Enable port forwarding for ports 1628 and 1629 in the NAT router for TCP and UDP,
Enable the SNTP port 123 in the firewall if SNTP is used.
Figure 85: Operating an L-IP behind a NAT router and firewall.
Note that an L-IP must be used as configuration server when the device is installed behind a
firewall or NAT router. The L-IP with the configuration server can also be located behind a
firewall.
7.3.2 Multiple L-IPs behind a NAT: Extended NAT Mode
When using more than one IP-852 device behind a single NAT router, the recommended
method in the L-IP configuration server is to use the extended NAT mode. This mode
requires that all devices support this feature. Currently these are L-IP,
i
.
LON
600, the
NIC852 PC software and other CEA-852 capable devices from LOYTEC. If there are other
devices in the channel, this method does not work. Incompatible devices are disabled from
the channel in this case. Please refer to the classic method in Section 7.3.3 to setup this
network.
When using multiple devices behind a NAT router, each device needs a separate port-
forwarding rule in the NAT router. This implies that each device must use a unique client
port (e.g., 1628, 1630, 1631, etc). The port-forwarding rules must be setup so that each port
points to one of the IP-852 devices. In the L-IP, change the client port in the CEA-852
device configuration menu. Figure 86 shows an example configuration for three L-IP
devices behind the NAT router 135.23.2.1.
It is recommended that both ports 1628 and 1629 are forwarded to the same private address.
It is then also possible to turn on the configuration server behind a NAT router. In this case,
activate the CS on the L-IP which has port-forwarding to 1628 and 1629. In the example in
Figure 86, the L-IP with private address 192.168.1.100 also acts as a configuration server.
If the CS is activated on a L-IP behind a NAT router, the NAT router must have a fixed
public IP address. The L-IP with the CS also cannot use automatic NAT discovery. In this
case, enter the NAT address of the NAT router manually in the IP configuration menu