Check network traffic ( Ddos )

Các câu lệnh thường được dùng khi kiểm tra check lưu lượng request tới

1. netstat command:

netstat -na

netstat -an | grep :80 | sort
netstat -an | egrep ":80|:443" | sort

1. To see if many active SYNC_REC :

netstat -n -p|grep SYN_REC | wc -l

1. To list out all the IP addresses sending SYNC_REC statuses, use the command:

netstat -n -p | grep SYN_REC | sort -u

1. To further list all the unique IP addresses sending SYNC_REC statuses, use the command:

netstat -n -p | grep SYN_REC | awk '{print $5}' | awk -F: '{print $1}'

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

netstat -anp |grep 'tcp|udp' | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

netstat -ntu | grep ESTAB | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -nr

netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1