User Documentation

Version 1.2 / August 2020 Page 73 / 102
A3 - Configuring the Router to connect 2 networks with different IP ad-
dress ranges and additional firewall rules
Application requirements:
There are 2 industrial Ethernet networks which are connected by a Router. Each network has its own IP ad-
dress range. All Ethernet nodes in both networks shall have the possibility to communicate with each other
except that devices B and C of network 1 cannot be accessed by a ping request (ICMP protocol).
This application can be done with all router models.
Solution:
Configure firewall rules to prohibit ping requests from devices of network 2 to devices B and C of network 1.
In this example the IP address ranges are set to
192.168.10.0 / 255.255.255.0 for Network 1 and
192.168.20.0 / 255.255.255.0 for Network 2
The Router interfaces will be set to
192.168.10.254 / 255.255.255.0 for LAN interface and
192.168.20.254 / 255.255.255.0 for WAN interface
Network diagram of below described application scenario