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Below are some WireShark commands that I find useful. Wireshark is an excellent tool for system administrators and penetration testers to capture traffic on a network.
Is your traffic efficient? Use the following filter to identify problems in your traffic:
This flag helps to look at problems you may have in a trace file. By using this filter, you can see re-transmissions, acknowledgement problems and more.
Are you seeing latency in traffic to a server or do you believe you’re being SYN attacked?
This filter will help you identify a SYN attack by recognizing the pattern of traffic that gets outputted.
Is an application operating? Do you have the port # for the application?
This will print you the stream of traffic on a specific port.
This built-in filter will show you packets that have some kind of expert message from Wireshark