Quick how to on capturing HTTP headers using tcpdump on a web server (running Linux).

• On the web server, issue the following command

[bash] tcpdump -s 1024 -C 1024000 -w /tmp/httpcapture dst port 80 [/bash]

• Stop the capture by issuing the break command (ctrl + c)
• Open the capture file (httpcapture in this example) in wireshark and check out the headers under the  the HTTP protocol