With the rapid development of industrial automation and the Internet of Things (IoT) technology, Cellular Modem Router have become crucial devices that connect field equipment to remote monitoring centers. Their performance and correct configuration directly affect the stability of the entire system and the efficiency of data transmission. Particularly in scenarios involving data forwarding between two network interfaces, properly setting up Cellular Modem Router is of utmost importance. This article aims to introduce the setup process of data forwarding between two network interfaces on Cellular Modem Router to traditional industry engineers.
Before delving into the data forwarding settings, let's first understand the basic concepts of the two network interfaces (LAN port and WAN port) on an industrial router:
· LAN port: Local Area Network Port, used to connect to the internal local area network, typically with field devices or internal servers.
· WAN port: Wide Area Network Port, used to connect to external wide area networks, such as the internet or upstream networks, enabling remote communication.
Data forwarding refers to the process of transferring data packets from one network interface to another. In Cellular Modem Router, data forwarding primarily involves technologies such as routing table matching, forwarding rule settings, and network address translation (NAT).
Connect the LAN port of the industrial router to a computer using a network cable. Open a web browser on the computer and enter the router's IP address along with the default username and password to log in to the management interface.
In the "Network Settings," configure the network parameters for both the LAN port and the WAN port. The LAN port is typically configured with the IP address range of the internal local area network, such as 192.168.1.x/24. The WAN port is configured based on the actual conditions of the external network, such as PPPoE dial-up or static IP.
The routing table is the core of data forwarding in Cellular Modem Router. In the routing table, you need to set the next-hop address or gateway for each destination network. For example, if you need to forward data from the LAN port to an external network (the network connected to the WAN port), you need to set a routing entry in the routing table from the LAN subnet to the WAN gateway.
In the "Forwarding Rules" or "NAT" settings, set the corresponding rules for the data that needs to be forwarded. For instance, if you want to enable remote access to a device inside the network (such as a camera with an IP address of 192.168.1.100), you need to create a NAT rule that forwards external network access requests to that device's IP address.
To ensure the security and stability of the network, enable the router's firewall function and configure security policies based on actual needs. For example, you can limit access permissions from external networks, set access control lists (ACLs), and so on.
After completing the settings, conduct testing and verification to ensure the correctness of data forwarding. You can use the ping command to test network connectivity or other network tools for packet capture and analysis.
1. When configuring network parameters, ensure that the IP address ranges of the LAN port and the WAN port do not conflict.
2. When setting the routing table and forwarding rules, carefully check the values of each parameter to ensure correctness.
3. When enabling the firewall and security policies, configure them based on actual needs to ensure the security and stability of the network.
4. During testing and verification, observe the network traffic and data packet forwarding situation to judge the correctness of the settings.
The setup of data forwarding between two network interfaces on Cellular Modem Router is a crucial aspect of industrial automation and IoT technology. Properly configuring network parameters, routing tables, forwarding rules, and firewall and security policies can ensure correct data forwarding and stable network operation. For engineers in traditional industries, understanding these technical details is significant for improving the overall performance and stability of industrial automation systems.
