User Documentation

ManualsBrandsWeidmueller ManualsAutomation & SoftwareU-LINK-LIC-STD-50-1Y

Page 53

Configuration of basic IP parameters (Step 5a)

Internet access via WAN port and using DHCP

▪ Now the IP parameters of the Routers Ethernet

interfaces have to be configured. The LAN port has to

be set according to the IP range of the remote network.

The WAN port will be used for Internet access.

▪ Based on our example we will configure the IP

parameters as shown in the screenshot. If you have a

4G Router (IE-SR-2/6GT-LTE/4G), inserted a SIM card

(any provider with Internet flat) you alternatively can

configure the Internet access via the 4G connection.

➢ Goto menu Configuration → IP Configuration.

➢ Set WAN port to DHCP (getting IP parameters from a

DHCP server).

➢ Set LAN IP to 192.168.1.254.

➢ Enable checkbox ‘NAT Masquerading’ at LAN port.

➢ Click button ‘Apply Settings’.

▪ Note: Now the Router will apply the settings. As

result you will lose the browser connection to the

Router due to changed LAN IP. Wait some seconds

and re-open the Web interface using the new IP

address 192.168.1.254.

Router receives Default

gateway from DHCP server

Currently connected to PC via Router LAN port (IP: 192.168.1.110)

Important note

“NAT Masquerading” has to be activated

if devices – connecded to Router LAN

port - does not have configured the

Router LAN IP as gateway.

Effect of NAT masquerading

If the checkbox is enabled then the

Router is replacing the source IP of an

incoming IP packet (via u-link VPN

tunnel) with its own LAN IP when the

packet is outgoing out of the LAN port to

a target device. Internally the Router

stores the requesting source IP to be

able to forward a reply packet back to

the original sender. When the LAN

device receives the request packet it

believes that the request comes from a

member of its own network (Router's

LAN IP) and is able to reply without

having configured a gateway.

Recommendation: Activate generally

"NAT masquerading" at LAN port when

using the Router with u-link.

4.6 Configuration of the Router

Chapter 4 – Setup of a remote access scenario (Configuration Router)

Internet access

via WAN port

(IP parameters

via DHCP)

Screenshot after parameter

configuration (but still not applied).