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From: Daniel Corbe <corbe@corbe.net>
To: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Subject: Re: /etc/pf.conf missing
References: <CAPi0pss6Sd7VWcDSR6JgSnJjOXVuxBLteL12dqM8KD=kpnBsAg@mail.gmail.com>
 <44h9uvvwkd.fsf@lowell-desk.lan>
Date: Mon, 09 Feb 2015 14:20:43 -0500
In-Reply-To: <44h9uvvwkd.fsf@lowell-desk.lan> (Lowell Gilbert's message of
 "Mon, 09 Feb 2015 12:12:02 -0500")
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Cc: freebsd-questions <freebsd-questions@freebsd.org>,
 Chris Stankevitz <chrisstankevitz@gmail.com>
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Lowell Gilbert <freebsd-questions-local@be-well.ilk.org> writes:

> Chris Stankevitz <chrisstankevitz@gmail.com> writes:
>
>> Q: Should I be alarmed?
>>
>> Handbook section 30.3.1 says "The default ruleset is already created
>> and is named /etc/pf.conf" but that file does not exist on my hard
>> drive.
>
> The Handbook (or at least the obvious interpretation of what it says;
> the awkward phrasing may mean that it was mis-edited at some point) is
> incorrect. 
>
> I'm not sure that a one-size-fits-all default ruleset (of the sort that
> exists for ipfw) is practical for pf.
>
>

The first time I ever messed with pf it was extremely difficult finding
practical examples.   Maybe what the distribution needs is more of this
and less of a one-size-fits-all approach.

Teaching tools in the form of configuration examples is also a great way
to get people thinking about security issues.  For example:

How do you get small offices and home users thinking about inbound
connectivity to their IPv6 endpoints now that NAT is no longer a thing?

And I know NAT is a terrible example of a security model; but generally
speaking, people are going to want NAT-like functionality in IPv6 where
you're only passing inbound traffic to inside hosts on established
connections.

IE:

# Default deny
block out inet6 all
block in inet6 all

# NAT-like behavior
pass out inet6 proto tcp flags S/SA keep state
pass out inet6 proto {udp, icmp6} flags S/SA modulate state

# Inbound rules go here
...