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kaerer/traceport.sh

Created November 15, 2017 09:58
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Dump all packages for selected port
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traceport.sh
#!/usr/bin/env bash
echo $1 | grep -E -q "^[0-9]+$" || (echo "Please specify a port number to listen to." ; exit 1)
PORT=$1
TCPDUMPARG="tcp port $PORT and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)"
sudo tcpdump -s 0 -A -i eth0 $TCPDUMPARG
#TCPDUMPARG="tcp port $PORT and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)"
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