squishy
https://en.wikipedia.org/wiki/Netfilter#
objectives
[ ] block all ports except
important
tcpdump
tcpdump -i tcp
tcpdump -i eth0
show the network interfaces
[prompt] ip link show
lo
enp0s31f6
br-3c9d77222953
docker0
hss0
veth7075590@if12
wireshark