IPV6 TCP6 Slow Connect

[Kristof Provost]

> On 12 Feb 2016, at 15:29, Larry Rosenman <ler at lerctr.org> wrote:
> 
> On 2016-02-12 08:13, Larry Rosenman wrote:
>> 
>> sysctl net.inet.tcp.rfc1323=0
>> makes it work
> Shouldn't the stack do the right thing here?  For the record, the other side
> is also FreeBSD (10.2-STABLE).
> 
Yes, but it’s possible that there’s a problem with the pf scrubbing of the window scaling or timestamp options.

I have a vague recollection of having looked at that in the past.
Bug 172648 also claims there is/was an issue with checksums in that case, but I’ve never been able to reproduce it.

Regards,
Kristof