tcpdump
show only syn / fin / rst packages
sudo tcpdump -i lo -n "port 3316 and (tcp[13] & 1 != 0 or tcp[13] & 2 != 0 or tcp[13] & 4 != 0)"
show only syn / fin / rst packages
sudo tcpdump -i lo -n "port 3316 and (tcp[13] & 1 != 0 or tcp[13] & 2 != 0 or tcp[13] & 4 != 0)"