Hi,

Le 01/09/2017 à 13:01, Michał Kępień via RT a écrit :
> As the original issue was reported for BIND 9.11, I prepared a patch
> (attached) which applies cleanly on top of BIND 9.11.2, which is the
> latest maintenance release in the 9.11 branch.
>
> Could you please test it and tell me whether the modified BIND behavior
> it causes is acceptable to you?  If it is, please do not pass the patch
> on just yet; once it gets merged, I will refer you to the relevant git
> commit.
>
> Just applying the patch and recompiling BIND should be all that is
> needed for FreeBSD to be handled in a bit more friendly manner.  As I
> mentioned before, the new configure option (--disable-tcp-fastopen) is
> only there for other systems that we currently do not know of which
> might exhibit a similar behavior.

I can confirm that the patch does not break BIND9 and that it still
works on my workstation and does not log anything superflous that I can
find.
I do not have any FreeBSD with a kernel where TCP fastopen is enabled
though, so I cannot really test any further.

Kind regards,

-- 
Mathieu Arnold