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Date:      Tue, 19 Jun 2007 14:01:45 +0200
From:      Max Laier <max@love2party.net>
To:        freebsd-pf@freebsd.org
Subject:   Re: firewalling and ALTQ
Message-ID:  <200706191401.56528.max@love2party.net>
In-Reply-To: <4677BF4A.8000601@techniumcast.com>
References:  <4677BF4A.8000601@techniumcast.com>

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On Tuesday 19 June 2007, Rob Shepherd wrote:
> I've just installed FreeBSD with a view to making a traffic shaping, or
> essentially transfer capacity limiting device.
>
> This must sit on bridged interfaces between org and edge outers.

It can be difficult to wrap one's head around traffic shaping on bridges=20
because of the ambiguous of IN/OUT on a bridge.  Be sure to filter on the=20
member interfaces instead and apply queueing there.

> I'm having some difficulty working out which bits I need, which packet
> filter to use and how to get started.
>
> The appears to be 3 packet filters
>
> pf,ipf,ipfw
>
> is this right? ALTQ works with each?

ALTQ works with pf and can be used from ipfw, too.  You will need pf=20
support regardless.  ipf does not support the ALTQ version available in=20
=46reeBSD at this time (afaik).  IPFW has dummynet, which can do traffic=20
shaping, too.

> additionaly, I don't seem to have any /dev/ entries

kldload pf / ipf / ipfw ... or use the rc.d scripts.  e.g. "etc/rc.d/pf=20
forcestart" later automate the process by flipping the right switches in=20
rc.conf(5).  You can also build the firewalls into your kernel, see the=20
handbook for details.  Note, that ALTQ can *not* be loaded as a module=20
and requires a custom kernel instead.

> There are many tutorials, but It's impossible to know what is the
> current supported filter package, what works best with bridging and
> ALTQ and how to test them when there's bit's missing.

=46eel free to write down your lessons learned and publish them ;)

=2D-=20
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