how to use wireshark to listen to router

In the “Filter” textbox, type “opcua”, and hit “Apply” to filter the trace to only show OPC-UA communications. You should be seeing frames appear in Wireshark’s main window at this point (probably scrolling too fast to read – that’s expected – reading and analysis is the next step!).Īfter a Wireshark trace has been collected during the desired problem behavior, it’s time to take a look at the communications to see what’s going on. If the goal is to troubleshoot some problem between the OPC-UA client and server, now would be the time to reproduce the issue you have been experiencing to make sure the behavior is included in the Wireshark capture. Let Wireshark run and capture the network traffic while the OPC-UA client and server are communicating. This is normal, and the OPC-UA communications can be filtered out later. It’s important to note that Wireshark will record ALL traffic (not just OPC-UA) on the network interface that is selected. For example, if the endpoint is “opc.tcp://192.168.111.75:49380”, the port will be 49380.Ĭhoose the correct Interface in Wireshark, and hit the “Start” button. The port can be found at the end of the OPC-UA server’s endpoint URL. Then, under the “Protocols” section, find the “OpcUa” protocol and make sure to enter the port that your OPC-UA server uses.

In Wireshark, go to “Edit -> Preferences” to open up the Preferences Window: In order to make sure Wireshark actually captures the data, it has to be told which port to listen on. The following steps will help you get started: This allows troubleshooting of strange or unexpected behavior between the OPC-UA client and server. As long as the communication is not encrypted (meaning that no security is used), it is fairly easy to capture and analyze the conversation. Wireshark, a free network sniffing utility, has a built-in filter for OPC-UA, which will allow the capture of communications between OPC-UA clients and servers. This blog will cover step-by-step how to use Wireshark to troubleshoot communications between your OPC-UA client and server applications. One of the easiest ways to analyze the communication between an OPC-UA client and server is to use Wireshark. As more and more companies are making the switch from OPC-DA to OPC-UA, it is becoming increasingly important to be able to troubleshoot OPC-UA communications.

How to use wireshark to listen to router