title: Stripping payload from a tcpdump?
body: <p>Is there an automated way (either in tcpdump or via a helper app Out There) to generate a pcap file that contains only Ethernet, IP and Layer 4 (TCP in my case) headers, so that there is no payload/application data in the resulting pcap? I've found that since header sizes often vary, it's impossible to pick a capture size that won't catch any payload data.</p>