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Date:      Fri, 12 Nov 2021 16:29:18 +0100
From:      Kurt Jaeger <pi@freebsd.org>
To:        tuexen@freebsd.org
Cc:        freebsd-net@freebsd.org
Subject:   Re: dtrace to trace incoming connection not suceeding ?
Message-ID:  <YY6ITiq%2B8x5nw5a/@fc.opsec.eu>
In-Reply-To: <43FC040E-E5DE-4F4E-B91E-AAA807207D05@freebsd.org>
References:  <YY5nhomjYRnRojwa-v2@fc.opsec.eu> <866D4765-25EF-4C5F-AA2E-D6BE8D5EBEEB@freebsd.org> <YY6C2/OyG3KTvV%2BM@fc.opsec.eu> <43FC040E-E5DE-4F4E-B91E-AAA807207D05@freebsd.org>

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Hi!

> >>> The basic ipfw firewall is active, but
> >> Does it work, if you disable ipfw?

> > No, unfortunatly not.

> OK. Can you provide the output of
> netstat -sptcp
> after some packets were dropped.

https://people.freebsd.org/~pi/logs/netstat-t1.txt
https://people.freebsd.org/~pi/logs/netstat-t2.txt

4 connection attempts in that time.

On the same 10g ix0 interface we have three VLANs:
- one (vlan551) of them uses tcp-md5 for another bgp session
- one (vlan500) does not use tcp-md5, and has the problem
- one (vlan724) does not use tcp-md5 for bgp, and works fine

-- 
pi@FreeBSD.org         +49 171 3101372                  Now what ?



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