Thank you @vjulien . It worked. After that I got another one issue, The code execution cannot proceed because wpcap.dll was not found. Reinstalling the program may fix the issue. This error will go if I install Npcap. I would like to know is there any other alternative way to resolve this issue. Or is there any alternative tool other than Npcap for resolving this issue. I am thinking about a new tool because Npcap is not open source. I am looking for an open source tool for resolving this issue. If you have any suggestions, please share with me.