Read a tcpdump file and count SYN packets to port 80, Order column by destination.

tcpdump -ntr NAME_OF_CAPTURED_FILE.pcap 'tcp[13] = 0x02 and dst port 80' | awk '{print $4}' | tr . ' ' | awk '{print $1"."$2"."$3"."$4}' | sort | uniq -c | awk ' {print $2 "\t" $1 }'

1
By: efuoax
2012-08-22 21:26:10

What Others Think

Hi, I am getting the following error while ran this command, ========== tcpdump: truncated dump file; tried to read 24 file header bytes, only got 0 =============== let me know what I did wrong .
altushost · 483 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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