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Date:      Tue, 31 Oct 2000 17:39:04 -0800 (PST)
From:      Archie Cobbs <archie@dellroad.org>
To:        "Thomas T. Veldhouse" <veldy@veldy.net>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: spontaneous reboot with bridging and firewalling two dc NICs
Message-ID:  <200011010139.eA11d4l52088@curve.dellroad.org>
In-Reply-To: <005301c04288$568c61c0$c70b200a@FairIsaac.com> "from Thomas T. Veldhouse at Oct 30, 2000 09:44:48 am"

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Thomas T. Veldhouse writes:
> Yesterday I emailed the list asking if it was possible to use two dc cards
> for bridging.  I am excited to say that it worked.  I was trying to utilize
> my 4 IP addresses behind my firewall.  This leads to the problem that this
> email is about.
> 
> I did some test downloads from various sites to get some not so scientific
> benchmarks and then I ran nmap against my newly exposed PCs to make sure
> that my LAN is still secure.  During these trials, my PC doing the bridging
> spontaneously rebooted 3 times.  Always during network usage.  Nothing at
> all was appended to the logs.  I noticed this problem about 6 months ago
> when I tried it with two ISA ed based cards.  At the time I attributed it to
> the driver, but now I can surmise that it is the bridging code, perhaps only
> in combination with ipfw functionality.
> 
> Unfortunately, this is my primary gateway and firewall, and I can not afford
> to experiment with this box - so I had to go back to my old NAT setup.
> 
> Does anybody have any suggestions?  Is there any documentation on how I
> might use proxy ARP to get the same affect (I have four public IP addresses
> and I want one or two for the firewall box and the other two on my LAN).

You might check out ng_bridge(4) and
/usr/share/examples/netgraph/ether.bridge.

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com


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