How do I find the application on my network that's dropping packets?
Learn how to use Wireshark to trace dropped packets being sent from a PC on your network or an external application/service and secure SMTP ports, from our expert Michael Gregg.
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In this example the source port is 2346. Source ports are typically chosen at random. If you have access to the system sending the traffic you can run a tool like fport or run netstat -an from the command line.
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