Re: IPV6 TCP6 Slow Connect

From: Larry Rosenman <ler_at_lerctr.org>
Date: Fri, 12 Feb 2016 08:29:29 -0600
On 2016-02-12 08:13, Larry Rosenman wrote:
> On 2016-02-12 08:02, Kristof Provost wrote:
>>> On 12 Feb 2016, at 10:18, Larry Rosenman <ler_at_lerctr.org> wrote:
>>> 
>>> On 2016-02-11 20:50, Larry Rosenman wrote:
>>>> On 2016-02-11 14:40, Larry Rosenman wrote:
>>>>> On 2016-02-11 14:25, Kristof Provost wrote:
>>>>> On 11 Feb 2016, at 21:23, Larry Rosenman <ler_at_lerctr.org> wrote:
>>>>> From which system(s) perspective do you want the packet captures?
>>>>> (Firewall, FreeBSD, Windows)? I wouldn't expect it to make much of 
>>>>> a difference in this case.
>>>>> Let's start with whatever is easiest.
>>>>> Regards,
>>>>> Kristof
>>>> I'll try and get these tonight when I am home, after a meetup.
>>>> (will be late US/CST).
>>>> --
>>>> Larry Rosenman                     http://www.lerctr.org/~ler
>>>> Phone: +1 214-642-9640                 E-Mail: ler_at_lerctr.org
>>>> US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961
>>>> at http://www.lerctr.org/~ler/FreeBSD/win10.pcap
>>> the 403 issue is fixed (forgot to chmod the file)
>>>> http://www.lerctr.org/~ler/FreeBSD/fbsd11.pcap
>>> URL corrected.
>>> 
>> At first glance the only difference is that FreeBSD includes
>> timestamps (and has a larger window scaling factor).
>> It might be worth turning that off to see if it makes a difference.
>> 
>> sysctl net.inet.tcp.rfc1323=1 should do the trick.
>> 
>> Regards,
>> Kristof
> 
> 
> 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).


-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 214-642-9640                 E-Mail: ler_at_lerctr.org
US Mail: 7011 W Parmer Ln, Apt 1115, Austin, TX 78729-6961
Received on Fri Feb 12 2016 - 13:29:30 UTC

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