Monday, September 14, 2026

TCP dump commands basics for packet tracing on wireless adapter

sudo tcpdump -i wlo1 -w capture.pcap
sudo tcpdump -i wlo1
sudo tcpdump -i any -w capture.pcap

sudo tcpdump -i eth0 -w eth0.pcap &
sudo tcpdump -i wlan0 -w wlan0.pcap &

sudo tcpdump -i wlo1 -s 0 -nn host oncomd.medgenome.com -w website_traffic.pcap

GUI - capture - statistics - conversations

Timestamp
Network Protocol - TCP/ UDP, DNS
Source IP & Port - 65535
The direction indicator 
Destination IP and Port
TCP flags
Sequence & acknowledgement Numbers
Window size
Data Length

sudo tcpdump -i eth0 port 80 or port 443 -w load_test_capture.pcap

sudo tcpdump -i eth0 -A -s 0 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)'