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Date:      Thu, 29 Oct 2020 14:29:09 +0100
From:      =?UTF-8?Q?Carsten_B=c3=a4cker?= <carbaecker@gmx.de>
To:        freebsd-hackers@freebsd.org, freebsd-arm@freebsd.org
Subject:   Problem with checksum offloading on RPi3 (PF + Jails involved)
Message-ID:  <748edc3d-4ef7-c4de-291f-7c0b460a6052@gmx.de>

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Hi Hackers,

just stumbled upon a problem on my RPi3, but i am not sure if this is
arm-related.

Running System:
"FreeBSD generic 12.1-RELEASE-p9 FreeBSD 12.1-RELEASE-p9 r365508
GENERIC=C2=A0 arm64"

I created a jail and set up NAT using PF. Same configuration runs
perfectly on my server.
However the jail was unable to resolve hostnames.

After enabling pflog for the NAT-rules i noticed these errors:
"[bad udp cksum 0xe58a -> 0x482d!]"

So i disabled checksum offloading and everything worked fine.
"ifconfig ue0 -rxcsum"

Any chance to get this fixed?

Regards
Carsten



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