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Perform a packet capture/ TCP dump for both Linux and Windows

Have you ever wanted to check out your signaling? Want to try and do some personal troubleshooting? Or do you have a ticket open that requires a PCAP (packet capture)? No matter the situation, the following article describes easy steps you can follow to get your PCAP. This article describes performing a packet capture/TCP dump for both Linux-based and Windows-based systems. 

For Linux-based systems

  1. Start a trace by running the following command: 

    tcpdump -s 3000 -w ~/flowroute-{{case.id}}.pcap port 5060 or portrange 10000-35000 

    tcpdump -s 3000 -w ~/flowroute-{{ticket.requester.first_name | downcase}}.pcap port 5060 or portrange 10000-35000. 

    NOTE: If you don't have the tcpdump, it should be available through your distribution's package manager or from http://www.tcpdump.org/.
  2. Place a test call to reproduce the problem you're experiencing.
  3. Close the trace by pressing CTRL+C.
  4. Compress and attach the resulting file, flowroute-{{case.id}}.pcap, to the ticket so that we can analyze the file to diagnose the issue. This file will be located in your home or ~/ directory.
  5. Compress and attach the resulting file, flowroute-{{ticket.requester.first_name | downcase}}.pcap, to the ticket so that we can analyze the file to diagnose the issue. This file will be located in your home or ~/ directory.
For Windows-based systems
  1. Download and install a network capture tool, such as Wireshark.
  2. Click the Capture menu, and then click Interface.
  3. Select the network interface on which the traffic is being sent and received, and then click Start.
  4. Place a test call to reproduce the problem you're experiencing.
  5. Click the Stop Capture icon on the menu.
  6. Click File, and then click Save As and save the file as flowroute-{{ticket.id}}.pcap.
  7. Compress and attach the resulting file, flowroute-{{ticket.id}}.pcap, to the ticket so that we can analyze the file to diagnose the issue.
  8. Click File, and then click Save As and save the file as flowroute-{{ticket.requester.first_name | downcase}}.pcap.
  9. Compress and attach the resulting file, flowroute-{{ticket.requester.first_name | downcase}}.pcap, to the ticket so that we can analyze the file to diagnose the issue. 
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