Capture only ssl handshake with tcpdump
<p>I have a server to which many clients connect using SSL. Recently I'm observing SSL handshake errors in the server logs (ex SSL MAC error). The error itself is not important, but I want to see why some clients are able to connect while others are failing, and also need to identify which clients are failing.</p>

<p>For debugging this issue, I want to capture all SSL handshakes happening at server and since I don't know when the problematic clients connect, I don't want to capture all the traffic till that happens. I just want to capture all the SSL handshakes and later analyze them with Wireshark. Assume that I only have access to tcpdump and no other tools for capturing.</p>