On Wed, Aug 22, 2018 at 2:02 AM Andy Smith <a...@strugglers.net> wrote: > > Hi Martin, > > On Wed, Aug 22, 2018 at 01:06:32AM +0300, Martin T wrote: > > In addition, "accept_ra" with a value of 2 should ensure that RA > > messages are accepted even if forwarding for that interface is > > enabled, shouldn't it? > > Yes, it should. > > That's the way it's documented and our use case is what it's meant > to serve, so if it's not behaving that way for you then I think it > is a bug and should be reported upstream in the kernel bugzilla. > > Cheers, > Andy >
Hi Andy, I did some additional tests and made following observations: 1) For IPv6 one can't enable/disable routing for specific interface(s). It is either off(/proc/sys/net/ipv6/conf/all/forwarding is 0) or on(/proc/sys/net/ipv6/conf/all/forwarding is 1). 2) /proc/sys/net/ipv6/conf/<INTERFACE_NAME>/forwarding controls simply if interface sends out RS messages and accepts RA messages Also, I found a post from David Miller in 2001(!) where he told pretty much the same: https://bugzilla.redhat.com/show_bug.cgi?id=38533 This means that I set the accept_ra in interfaces file to 1 for eth0(ISP-facing interface) and added those two lines to sysctl.conf: net.ipv6.conf.all.forwarding=1 net.ipv6.conf.eth0.forwarding=0 Martin
