Tip: tcpdump will show you traffic that arrives at a box, does not matter if you have netfilter rules on FORWARD or INPUT that will block that traffic or if there is a service running or not on that port.Now comes the trick: How to make apache listen on that port without changing its configuration?iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 8080 -j REDIRECT --to-port 80The REDIRECT target o