Date: Sat, 16 Apr 2022 09:19:57 -0400 From: Michael Butler <imb@protected-networks.net> To: Gleb Smirnoff <glebius@freebsd.org>, Florian Smeets <flo@smeets.xyz> Cc: freebsd-current@freebsd.org Subject: Re: IPv6 TCP: first two SYN packets to local v6 unicast addresses ignored Message-ID: <0c261aa6-93d4-5627-d44d-f160323a7ca3@protected-networks.net> In-Reply-To: <YlpSs8p/3Gh1JDI5@FreeBSD.org> References: <131c363a-7b7d-a106-5b8a-6838e7a66567@smeets.xyz> <E0584477-0F2E-454D-871C-368F14A9AF1D@freebsd.org> <9679642b-5de6-28be-a64b-07375c3efeba@smeets.xyz> <b12a74b2-cd7d-2066-ff60-b14c08d70d6f@protected-networks.net> <YlpSs8p/3Gh1JDI5@FreeBSD.org>
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On 4/16/22 01:22, Gleb Smirnoff wrote: > Hi Florian, Hi Michael, > > On Fri, Apr 15, 2022 at 06:11:13PM -0400, Michael Butler wrote: > M> >> I can reproduce this locally, will try to figure out what is going on. > M> >> If you can bisect it, it would be great. > M> > > M> > Found the culprit 1817be481b8703ae86730b151a6f49cc3022930f. And indeed > M> > toggling net.inet6.ip6.source_address_validation makes the issue go away > M> > on latest main. > M> > M> I found this commit and the ipv4 analog also cause packets between > M> non-VNET jails on the same host and to the host itself to be dropped :-( > > I see your mails and will look into the problem ASAP. > > Meanwhile... > > Florian, can you please confirm you are using jails too? > > Michael, can you please confirm or decline that you see the packets > that are dropped when you tcpdump on lo0? All the jails are aliased to share a single bridge interface. That results in the route to each jail being on lo0 so .. probably :-) Michael
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