On Wed, Mar 06, 2024 at 03:18:04PM +0100, Linus Lüssing wrote: > So far Multicast Router Advertisements and Multicast Router > Solicitations from the Multicast Router Discovery protocol (RFC4286) > would be marked as INVALID for IPv6, even if they are in fact intact > and adhering to RFC4286. > > This broke MRA reception and by that multicast reception on > IPv6 multicast routers in a Proxmox managed setup, where Proxmox > would install a rule like "-m conntrack --ctstate INVALID -j DROP" > at the top of the FORWARD chain with br-nf-call-ip6tables enabled > by default. > > Similar to as it's done for MLDv1, MLDv2 and IPv6 Neighbor Discovery > already, fix this issue by excluding MRD from connection tracking > handling as MRD always uses predefined multicast destinations > for its messages, too. This changes the ct-state for ICMPv6 MRD messages > from INVALID to UNTRACKED. > > This issue was found and fixed with the help of the mrdisc tool > (https://github.com/troglobit/mrdisc). > > Signed-off-by: Linus Lüssing <linus.luessing@xxxxxxxxx> Hi Linus, this appears to be a fix and as such I think it warrants a Fixes tag. You should be able to just add it to this thread if no other changes are required - no need for a v2 just to address this. ...
