TCPDUMP COMMANDS

Show packets with SYN flags

`tcpdump -i eth0 'tcp[flags] & tcp-syn !=0'

Exclude port 22 (SSH Traffic)

sudo tcpdump -i any tcp and not port 22 -X

To filter traffic from a specific IP address using tcpdump

tcpdump -i any src host <specific-ip> -X

IPTABLES COMMANDS

Add iptables rule

iptables -A INPUT -s <ip> -j DROP

Delete iptables rule

iptables -D INPUT -s <ip> -j DROP

List out iptables rules

iptables -L -n -v

Flush all tables rules

iptables -F