tcpdump -n not port 22
tcpdump -nn -n not port 22 and not port 3389
tcpdump -nn -n not port 22 and src host 10.0.0.1

mailverkehr sniffen: -> wichtig ist option s0 damit paket nicht abgeschnitten werden
tcpdump -l -i eth0 -n not port 22 -s0 -w sniff4.txt

call with: tcpdump -e -n -q -r filename //reading from file
tcpdump -w filename //write to file
tcpdump -I //no buffering

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