Date: Mon, 23 Nov 2009 10:27:43 -0800 From: Benjamin Lee <ben@b1c1l1.com> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-net@freebsd.org, freebsd-current@freebsd.org, Hajimu UMEMOTO <ume@freebsd.org>, Doug Barton <dougb@freebsd.org> Subject: Re: [CFR] unified rc.firewall Message-ID: <4B0AD41F.6020709@b1c1l1.com> In-Reply-To: <200911231255.26279.jhb@freebsd.org> References: <ygeljhyk1qg.wl%ume@mahoroba.org> <200911231056.15247.jhb@freebsd.org> <ygetywlgnic.wl%ume@mahoroba.org> <200911231255.26279.jhb@freebsd.org>
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On 11/23/2009 09:55 AM, John Baldwin wrote:
> On Monday 23 November 2009 12:27:23 pm Hajimu UMEMOTO wrote:
>> Hi,
>>
>>>>>>> On Mon, 23 Nov 2009 10:56:14 -0500
>>>>>>> John Baldwin <jhb@freebsd.org> said:
>> jhb> # For services permitted below.
>> jhb> ${fwcmd} add pass tcp from me to any established
>> jhb> + if [ $ipv6_available -eq 0 ]; then
>> jhb> + ${fwcmd} add pass ip6 from any to any proto tcp e=
stablished
>> jhb> + fi
>>
>> jhb> I think this extra rule here isn't needed at all as the first rul=
e should
>> jhb> already match all of those packets.
>>
>> WORKSTATION type rule is fully dynamic. However, I saw it doesn't
>> work for IPv6 as expected. SSH connection stalls after some period.
>> I suspect keepalive timer doesn't work well for IPv6.
>> So, I changed to use traditional setup/established rule for TCP/IPv6.
>> Further, 'me' doesn't match to IPv6 address.
>=20
> I had missed the me vs any. It is true that the equivalent rule would =
use
> me6. I would rather figure out the IPv6 bug so that TCP is treated the=
> same for both protocols instead of having a weaker firewall for IPv6 th=
an
> IPV4.
There is a bug in ipfw send_pkt() that prevents ipfw_tick() from
functioning for IPv6. See PR kern/117234.
--=20
Benjamin Lee
http://www.b1c1l1.com/
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