Tcpdump
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SNI
tcpdump -nnpi F5_Internal -s 1500 '(tcp[((tcp[12:1] & 0xf0) >> 2)+5:1] = 0x01) and (tcp[((tcp[12:1] & 0xf0) >> 2):1] = 0x16)' -nnXSs0 -ttt
Headers
sudo tcpdump -nnpi F5_Internal -A -s 10240 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)' | egrep --line-buffered "^........(GET |HTTP\/|POST |HEAD )|^[A-Za-z0-9-]+: " | sed -r 's/^........(GET |HTTP\/|POST |HEAD )/\n\1/g'