Re: TCP connection ignore RST

From: Michael Tuexen <michael.tuexen_at_lurchi.franken.de>
Date: Tue, 7 Sep 2021 11:57:10 +0200
> On 7. Sep 2021, at 11:47, Rozhuk Ivan <rozhuk.im_at_gmail.com> wrote:
> 
> On Tue, 7 Sep 2021 10:47:01 +0200
> Michael Tuexen <michael.tuexen_at_lurchi.franken.de> wrote:
> 
>>>>> I have strange case: FreeBSD 12.2 ignore TCP RST from windows host
>>>>> and continue retransmitting packets. sockstat show that socket
>>>>> connected even after many tcp rst packets received.
>>>>> 
>>>>> Any ideas how to fix it?    
>>>> Where is the trace taken? On the Windows side or on the FreeBSD
>>>> side or somewhere else? Could you provide the .pcap file?
>>>> 
>>> 
>>> From FreeBSD side.
>>> 
>>> https://reviews.freebsd.org/D28142
>>> e82353f84c58da9a5c38bd471a09936c16a5b6ea
>>> https://reviews.freebsd.org/D28143
>>> d05d908d6d3c85479c84c707f931148439ae826b sysctl
>>> net.inet.tcp.tolerate_missing_ts=1 this fixes issue for me.  
>> That was my first guess, but after double checking, this code is not
>> present in FreeBSD 12.2. However, it is present in stable/12.
>> So could it be that you are using stable/12 and not 12.2?
>> 
> 
> System build from:
> commit 8c01699f9194cfa3805ac734ae912529a10c063a
> CommitDate: Wed Jan 20 14:40:13 2021 +0100
> Add some examples to script.1...
> 
> It is not "clean" 12.2, and it is a bit early than commits with fixes.
Ahh, OK. I was assuming that it is 12.2. Sorry for the confusion on my
side.
The following commit should fix your issue:
https://cgit.FreeBSD.org/src/commit/?id=d05d908d6d3c85479c84c707f931148439ae826b

Best regards
Michael
Received on Tue Sep 07 2021 - 09:57:10 UTC

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