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Date:      Tue, 12 Aug 2008 13:21:45 +0200
From:      "Adrian Penisoara" <ady@freebsd.ady.ro>
To:        "Fred Portnoy" <fportnoy@mail.plymouth.edu>
Cc:        freebsd-ipfw <freebsd-ipfw@freebsd.org>
Subject:   Re: ipv4 diffserv entry
Message-ID:  <78cb3d3f0808120421i334c483fm7aecddd30aed22d@mail.gmail.com>
In-Reply-To: <142385261.269891218486614044.JavaMail.root@cygnus.plymouth.edu>
References:  <142385261.269891218486614044.JavaMail.root@cygnus.plymouth.edu>

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Hi,

On Mon, Aug 11, 2008 at 10:30 PM, Fred Portnoy
<fportnoy@mail.plymouth.edu> wrote:
> By using Sniffer and tcpdump together, it appears that the entry in the "TOS" field of the IPv4 header is getting stripped off as the packet leaves the external facing interface of the firewall. Is this known behavior? Is there a way to preserve the TOS?

 Which firewall framework are we talking about (ipfw / pf / ipf) ?
Does it reproduce with all/other firewalls ?
 If you completely disable the firewall, does the issue stop reproducing ?

Regards,
Adrian.



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