On Saturday 2011-10-29 20:23, Andrew Beverley wrote: >> I can even add the following >> line to my server. (This is in the case I use port redirection. Then I >> use this line to make it an effective security enhancement): >> >> iptables -I PREROUTING -t raw -p udp --dport 500 -j DROP > >Yes, but the packets originating from the server will not pass through >the PREROUTING chain. > >> Besides, I designed my netfilter configuration to not differentiate >> between interfaces. I use the addrtype extension, works better. > >I like that, but remember that any packets leaving the server will only >traverse the OUTPUT and POSTROUTING chains. This is wrong information. Packets very well pass through PREROUTING even when they come from lo. -- To unsubscribe from this list: send the line "unsubscribe netfilter" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
