Please take care modifying your firewall. If you don’t understand what’s being done here you may lock yourself out of your machine. You’ve been warned 🙂 !
In order to log dropped packets on the INPUT chain I replaced this:
-A INPUT -i eth0 -j REJECT -reject-with icmp-host-prohibited
-N LOGDROP -A LOGDROP -i eth0 -j LOG -A LOGDROP -i eth0 -j REJECT -reject-with icmp-host-prohibited -A INPUT -i eth0 -j LOGDROP
Of course you can use DROP instead of REJECT -reject-with icmp-host-prohibited