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Date:      Fri, 20 Jun 2003 14:58:07 -0400
From:      Don Bowman <don@sandvine.com>
To:        'Luigi Rizzo' <rizzo@icir.org>, Don Bowman <don@sandvine.com>
Cc:        "'freebsd-net@freebsd.org'" <freebsd-net@freebsd.org>
Subject:   RE: nested ipfw dummynet pipes
Message-ID:  <FE045D4D9F7AED4CBFF1B3B813C8533702741AFA@mail.sandvine.com>

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From: 'Luigi Rizzo' [mailto:rizzo@icir.org]
> On Fri, Jun 20, 2003 at 02:18:17PM -0400, Don Bowman wrote:
> ...
> > Thanks very much, I will check this. I assume this will be true
> > for IPFW2 rather than IPFW.
> 
> one_pass actually affect both.
> the comment in parentheses refers to "layer 2 firewalling
> which is an ipfw2-only fature (bridge firewalling
> is also available with ipfw1)

This works correctly, thanks very much. Attached is a trivial
patch to correct the man page.

Is there a benefit to having the single wide pipe first, or
the many narrow pipes first, in the ruleset?

$ cvs diff -U5 ipfw.8
Index: ipfw.8
===================================================================
RCS file: /usr/cvs/src/sbin/ipfw/ipfw.8,v
retrieving revision 1.63.2.28
diff -U5 -r1.63.2.28 ipfw.8
--- ipfw.8      30 Sep 2002 20:57:05 -0000      1.63.2.28
+++ ipfw.8      20 Jun 2003 18:49:02 -0000
@@ -1587,14 +1587,10 @@
 When set, the packet exiting from the
 .Xr dummynet 4
 pipe is not passed though the firewall again.
 Otherwise, after a pipe action, the packet is
 reinjected into the firewall at the next rule.
-.Pp
-Note: bridged and layer 2 packets coming out of a pipe
-are never reinjected in the firewall irrespective of the
-value of this variable.
 .It Em net.inet.ip.fw.verbose : No 1
 Enables verbose messages.
 .It Em net.inet.ip.fw.verbose_limit : No 0
 Limits the number of messages produced by a verbose firewall.
 .It Em net.link.ether.ipfw : No 0



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