linux-config-port-mirror

gistfile1.txt

local_ip=
local_port=
remote_ip=
remote_port=

iptables -t nat -A PREROUTING -d $local_ip -p tcp --dport $local_port -j DNAT --to-destination $remote_ip:$local_port
iptables -t nat -A POSTROUTING -d $remote_ip -p tcp --dport $remote_port -j SNAT --to $local_ip
iptables -A FORWARD -o eth1 -d $remote_ip -p tcp --dport $remote_port -j ACCEPT
iptables -A FORWARD -i eth1 -s $remote_ip -p tcp --sport $remote_port -j ACCEPT

iptables -vnL --line-numbers
iptables -D FORWARD 1