From owner-freebsd-pf@freebsd.org  Tue Oct 13 10:32:26 2015
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Subject: Re: Rules sanity check
From: Kristof Provost <kp@FreeBSD.org>
In-Reply-To: <CAPORhP7GxqYGmzk1ZT7sAzMMze3CEwkWUCC2zDWRLNJZC=RH9Q@mail.gmail.com>
Date: Tue, 13 Oct 2015 12:32:21 +0200
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References: <CAPORhP7GxqYGmzk1ZT7sAzMMze3CEwkWUCC2zDWRLNJZC=RH9Q@mail.gmail.com>
To: David Mehler <dave.mehler@gmail.com>
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> On 13 Oct 2015, at 05:51, David Mehler <dave.mehler@gmail.com> wrote:
> Some things I know definitely aren't working is the ipv6 allowing of
> ssh and http, ipv6 ping doesn't work gives a udp error, ftp from the
> machine the data connection doesn't come through, i'm assuming i'll
> have that same problem when I set up a jailed ftp server as well.
>=20
You really, really want to allow ICMPv6. Without ICMPv6 critical things
like path MTU (remember, there=E2=80=99s no router fragmentation in =
IPv6, you
*need* path MTU discovery) and router advertisements.

It=E2=80=99s still possible to filter out undesirable ICMPv6 types, but =
I=E2=80=99d start
out just allowing everything.

I=E2=80=99ve not looked at the rest of it in any depth, but the ICMPv6 =
thing probably
explains all of the IPv6 issues you=E2=80=99ve had.

Regards,
Kristof