Re: IPv6 TCP: first two SYN packets to local v6 unicast addresses ignored

  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?

-- 
Gleb Smirnoff