General
tcpdump -D
... shows the list of all available interfaces
tcpdump -n -e -tttt -i pflog0 dst port ! (22 or 23)
... do NOT include destination ports 22 and 23
Argument description
- -e Print the link-level header on each dump line
- -F Use file as input for the filter expression.
- -n Don't convert addresses (i.e., host addresses, port numbers, etc.) to names
- -r Read packets from file
- -tttt Prints a timestamp in default format proceeded by date on each dump line