I'll second what Jason said here. I've had the same issue in the past and resolved it by enabling option Jason mentioned. This can also be found in menuconfig here: Device Drivers >> Networking Support >> Networking Options >> Network packet filtering >> IP: Netfilter Configuration >> [ ] Nat of local connections. Josh Nerius On Fri, 19 Nov 2004 12:41:00 -0500, Jason Opperisano <opie@xxxxxxxxxxx> wrote: > On Fri, Nov 19, 2004 at 06:36:02PM +0100, Stephan Uhlmann wrote: > > > > Hello netfilter friends, > > > > I want to redirect all connections going to port 80 of a host to port 8080 of > > the same host. Of course I do it with the REDIRECT target: > > > > iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-ports 8080 > > iptables -t nat -A OUTPUT -p tcp --dport 80 -j REDIRECT --to-ports 8080 > > > > The redirection of externally incoming connections via PREROUTING works > > perfectly fine. > > > > But I have the problem that locally generated connections are not redirected > > on machines with Linux Kernel 2.6 but on machines with Linux Kernel 2.4. > > > > I tested: > > SuSE Linux 9.0 (Kernel 2.4.21, iptables v1.2.8) - works > > SuSE Linux 9.1 (Kernel 2.6.5, iptables v1.2.9) - does not work > > SuSE Linux 9.2 (Kernel 2.6.8, iptables v1.2.11) - does not work > > Gentoo Linux (Kernel 2.6.9, iptables v1.2.11) - does not work > > > > "iptables -t nat -L -v" shows that no packet at all was catched by the OUTPUT > > chain. Instead it seems to go to the POSTROUTING chain. But the REDIRECT > > target can't be used in the POSTROUTING chain. > > > > Is this a bug? Is this a feature? Did something change between Kernel 2.4 and > > 2.6 in this regard? > > > > I looked through the ChangeLogs and other docs but didn't find any hint. > > are all kernels in question compiled with: IP_NF_NAT_LOCAL > > -j > > -- > "Man, you go through life, you try to be nice to people, you struggle > to resist the urge to punch 'em in the face, and for what?" > --The Simpsons > > -- Math problems? Call 1-800-[(10x)(13i)^2]-[sin(xy)/2.362x]
