Skip site navigation (1)Skip section navigation (2)
Date:      Mon, 27 Jun 2022 14:41:08 +0200
From:      Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
To:        Dave Cottlehuber <dch@skunkwerks.at>, freebsd-net <freebsd-net@freebsd.org>
Subject:   Re: missing SYN/ACK for inbound TCP solved by altering broadcast address - why?
Message-ID:  <6e6d272a-0954-1fba-c0eb-14480d858a37@plan-b.pwste.edu.pl>
In-Reply-To: <b727be82-f90b-4391-b151-81660f204a00@www.fastmail.com>
References:  <b727be82-f90b-4391-b151-81660f204a00@www.fastmail.com>

next in thread | previous in thread | raw e-mail | index | archive | help
This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--------------8WA2AoS49icHEHbcOjUIm8Tz
Content-Type: multipart/mixed; boundary="------------Pjddun6njkpcDpiM8TWssOT7";
 protected-headers="v1"
From: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
To: Dave Cottlehuber <dch@skunkwerks.at>,
 freebsd-net <freebsd-net@freebsd.org>
Message-ID: <6e6d272a-0954-1fba-c0eb-14480d858a37@plan-b.pwste.edu.pl>
Subject: Re: missing SYN/ACK for inbound TCP solved by altering broadcast
 address - why?
References: <b727be82-f90b-4391-b151-81660f204a00@www.fastmail.com>
In-Reply-To: <b727be82-f90b-4391-b151-81660f204a00@www.fastmail.com>

--------------Pjddun6njkpcDpiM8TWssOT7
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: base64
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--------------Pjddun6njkpcDpiM8TWssOT7--

--------------8WA2AoS49icHEHbcOjUIm8Tz
Content-Type: application/pgp-signature; name="OpenPGP_signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature"

-----BEGIN PGP SIGNATURE-----

wsB5BAABCAAjFiEEnjwyTmqn2oNX6C8qHZW8vIFppoIFAmK5pWQFAwAAAAAACgkQHZW8vIFppoLW
dQf8CYfU4pD8BOcF1h8VSOpiyWFMKcKDJTmjnlUDYc4EiSGz4pfjG+Gx1juU1CUCniqD1zaNRpLn
QF1Uq0C9gzQVYtmnRL7brDeDRA0TlDGvKJW2YKJOpOgUcvgTJNtKugD7U8kkG5HTPiHyXB0kGdJk
5RDcYCkZNkpMxd3K0Vk9Q/wX35jlsalcaYxqKX102QpmrUn/o4FXh2Kmg3lzJvKwMFsHK7VMpu9R
I/XHwknh02GTRtS5lOx3UllEwAQ0opzTH4Z0yI+dV9J9BJfnYUyvGzAgBW7zcoK8l6Lv0JzGlzCX
fEl6N6JVgoMmpoQZSE2ZwvDjcacmA8lgXqcv+1lkJA==
=GlUS
-----END PGP SIGNATURE-----

--------------8WA2AoS49icHEHbcOjUIm8Tz--



Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6e6d272a-0954-1fba-c0eb-14480d858a37>