I have two interfaces eth0 (192.168.1.2) and eth1 (192.168.3.2).
I receive data from 8080 at eth0. I want to forward it to eth1 port 80.
I'm using UFW, because i don't understand iptables and how to add it at the beggining of /etc/ufw/before.rules.
I've already edited DEFAULT_FORWARD_POLICY="ACCEPT" on /etc/default/ufw and already edited net.ipv4.ip_forward=1 on /etc/ufw/sysctl.conf