Hello Spirit, this is a sample output of tcpdump -en
14:38:12.606071 MAC_OF_HETZNER_SW > FAKE_MAC, ethertype IPv4 (0x0800), length 66: UNKNOWN_NET_IP.12202 > IP_IN_MY_CLASS.80: Flags [S], seq 3272021817, win 65535, options [mss 1460,nop,nop,sackOK,nop,wscale 12], length 0
14:38:13.018601...