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FTP traffic

	commands
List Interfaces:	sudo tcpdump -D
DHCP traffic:	sudo tcpdump -i eth1 -vvv port bootps
DNS traffic:	sudo tcpdump -vvv -s 0 -l -n port 53
TFTP : NOT Working :	sudo tcpdump -i eth1 port tftp -vvv port 69
FTP traffic	tcpdump -i eth0 "port ftp or port ftp-data"
icmp / ping	tcpdump -i eth1-n icmp
multicast	`tcpdump -i eth1 -vv net 224.0.0.0/4`
mpls or ipv6	tcpdump -i eth1 -vvv mpls ( or ipv6 )
vlan	`tcpdump -i eth1 -nn -e vlan`

Host traffic, source OR dest IP@:	sudo tcpdump -i ens33 port not 22 and host 192.168.0.16	or hostname
	sudo tcpdump -i ens3 port 930 and host 172.20.8.20	SSR IPC
Exclude SSH session:	sudo tcpdump -i eth2 port not 22	"and port not 53"
	tcpdump -i eth0 "port ftp or port ftp-data"
src and dst IP@	tcpdump 'src 192.168.0.211 or dst 192.168.0.211'

Exclude SSH session:	sudo tcpdump	icmp / ping	tcpdump -i eth1-n icmp -i eth2 port not 22	"and port not 53"
BGP	sudo tcpdump -i eth2 port 179
write / save to txt file	tcpdump -i virbr0 > virbr0_dhcp.txt	redirect the output
save to wireshark file / binary	tcpdump -i virbr0 -w virbr0_dhcp.pcap
read a file	tcpdump -r traffic.pcap

tcpdump on SSR
Any SSH traffic on any interface	sudo tcpdump -n -i any -v 'ip[1] & 0xfc == 0x10' and port 22	ip[1]???

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