From: Michael Ulmer <mul...@cradlepoint.com> Date: Tue, 16 May 2017 15:37:39 +0000
> Blast from the past. 10 years back Wei Dong submitted the patch found > (amongst several places) here: > http://lists.openwall.net/netdev/2007/01/30/20 > > Problem: > I have a firewall rule that DNATs ipv6 traffic from a destination address to > ::1. The route lookup gives me the Main table & forwards that DNAT'd traffic > instead of sending it to local process. > > Example: > Looking at this from a netfilter point of view, a client (IP of fd00::5) > requests a web page at [2000::25:0:0:1]:8080. The firewall rule DNATs it to > ::1 (note that I threw a -j TRACE in raw's REROUTING). > TRACE: nat:PREROUTING:rule:2 SRC=fd00::5 DST=2000::25:0:0:1 > TRACE: mangle:FORWARD:rule:1 SRC=fd00::5 DST=::1 > > The patch is verbatim (as is the subject line for this > email). Traffic DNAT'd to ::1 now goes to mangle's INPUT chain after > routing decision. I'm not sure why it was removed--I'm assuming it > was an accident--as I can't find a record in the mailing list > archive. It's not by accident, he received feedback from Yoshifuji and suggested alternative ways to fix his problem: http://marc.info/?l=linux-netdev&m=117020569620697&w=2 In fact, Yoshifuji stated that some of the behaviors are indeed intentional.
