IPFW divert with layer 2 interfaces

[Jake Guffey]

Thanks for the response, Julian.

Any thoughts, Doug?

Thanks,
Jake Guffey
Network Security Engineer

eProtex
Network medical device security

5451 Lakeview Parkway S Drive
Indianapolis, Indiana 46268, USA
Mobile: 317-220-7100
jake.guffey at eprotex.com
www.eprotex.com

On Jan 24, 2013, at 12:37 PM, Julian Elischer <julian at freebsd.org> wrote:

> On 1/24/13 10:16 AM, Jake Guffey wrote:
>> Hi:
>> 
>> I am working on a network appliance based on FreeBSD, IPFW, and Suricata. In the scenario that I'm developing for, I need to divert packets sent over a layer 2 bridge for IPS processing. After reinjection, IPFW passes this traffic back to FreeBSD for layer 3 forwarding. I would like to get this working for layer 2 forwarding across the bridge interface(s) involved.
>> 
>> I saw http://freebsd.1045724.n5.nabble.com/patch-RFC-allow-divert-from-layer-2-ipfw-e-g-bridge-td4008335.html from quite some time ago (2006), and that one of the responders said that he didn't want to commit layer 2 diversion support before layer 2 packet filtering hooks were put in place. To my understanding (please correct me if I'm wrong), the pfil hooks he was referring to are in place now.
> 
> hithere..
> The original code you refer to was written by Ironport (now cisco) after lookign at similar code bu imimic (then ironport, now cisco :-)) for use in their
> web filter appliance.
> 
> It did work well, however I'm not in that field any more so I can't justify work time in getting it up to date..
> Nor o I have access any more to test machines that I can test the result with.
> 
> It may be worth asking Doug  Ambrisko what the current version of the code looks like.. We had permission to
> give it back (hense the email) but it never got put into the tree.
> 
>> Is there something I can do to help make this happen? I am very rusty with C and will probably not be much help coding, but anything else, I'd be glad to do. I suppose that I could give coding this support a shot, with (likely) a bit of hand-holding from you.
>> 
>> The company that I work for has allocated budget for consulting, so I would be glad to help fund development if that's an issue.
>> 
>> Thanks,
>> Jake Guffey
>> Network Security Engineer
>> 
>> eProtex
>> Network medical device security
>> 
>> 5451 Lakeview Parkway S Drive
>> Indianapolis, Indiana 46268, USA
>> Mobile: 317-220-7100
>> jake.guffey at eprotex.com
>> www.eprotex.com
>> 
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>> 
>