From mboxrd@z Thu Jan 1 00:00:00 1970 From: horape@tinuviel.compendium.com.ar Subject: Re: DNATing packets sent to the NATing box Date: Sun, 21 Dec 2003 01:49:56 -0300 Sender: netfilter-admin@lists.netfilter.org Message-ID: <20031221044956.GC1490@tinuviel.compendium.com.ar> References: <20031214005212.GA8217@tinuviel.compendium.com.ar> Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Return-path: Content-Disposition: inline In-Reply-To: <20031214005212.GA8217@tinuviel.compendium.com.ar> Errors-To: netfilter-admin@lists.netfilter.org List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Content-Type: text/plain; charset="iso-8859-1" To: netfilter@lists.netfilter.org > I've a system that at its core has an UDP proxy that's the performance > bottleneck. I wanted to use the DNAT kernel facilities to replace my > code with the very tuned one on netfilter. > I'm adding a rule that says something like this: > /sbin/iptables -t nat -A PREROUTING -d myip -p udp -m udp --dport 5000 -j= DNAT > --to-destination otherip:18918 > but the rule never see the packets (they never got to the chain) > I assume that it's because I've a socket listening on udp:5000, and it se= ems > reasonable what's happening... I'd like to add a PREPREROUTING chain that > is processed before deciding if the packet is for a local socket, can som= ebody > give me a hint on where to look for it? Thanks to everybody who helped. I've just wrote a new mangle target that does the translation and it's working great. Saludos, HoraPe --- Horacio J. Pe=F1a horape@compendium.com.ar horape@uninet.edu