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Subject: Re: Jail - PF - NAT - Network Performance
From: Kristof Provost <kp@FreeBSD.org>
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Date: Sun, 25 Oct 2015 18:12:10 +0100
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To: James Lodge <James@Lodge.me.uk>
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> On 25 Oct 2015, at 17:46, James Lodge <James@Lodge.me.uk> wrote:
> I currently have a FreeBSD 10.1 host running on Digital Ocean. I have =
multiple jails and I'm not using vimage.
>=20
>=20
> I'm using PF on the host to NAT traffic from said jails and all is =
working as expected. I have a jail running OpenVPN and clients can =
connect and traffic is routed to the Internet down the tunnel via =
PF/NAT. The issue I'm seeing is download speeds to the client from the =
Internet on the external side on PF. Upload always seem reasonable, but =
download is always woeful. I'm using a Windows machine as the client if =
that make any odds.
>=20
Yeah, there=E2=80=99s an issue with checksums and pf/Xen.=20
Disabling TSO should work for you (sudo sysctl net.inet.tcp.tso=3D0), =
and the problem should be completely fixed in the next release (10.3 or =
11.0)

Regards,
Kristof=