On Mon, Sep 22, 2014 at 5:12 PM, Elof Ofel <elof...@hotmail.com> wrote:
> I have a single NIC, mon0, that constantly receive 800 Mbps of mirrored 
> traffic.
> I want to split these 800 Mbps into smaller chunks and feed them to a couple 
> of virtual interfaces.
> Each virtual interface can then have instance of 'snort' inspecting its 
> traffic.
>
> Say approximately 200 Mbps per interface = four interfaces.
> That way, each of the four snort processes only get 200 Mbps of data to 
> inspect instead of having *one* single snort process (single-threaded) trying 
> to cope with 800 Mbps.
>
> (the problem I'm trying to solve is utilizing all cpu's. Currently one cpu 
> runs snort at 100% while all the other cpu's idle.)
>
>
> The important thing though is that all packets in the connection need to be 
> diverted to the same virtual NIC. You can't send the SYN to NIC0 and the 
> SYN-ACK to NIC1, 'cause then neither snort-process-0 nor snort-process-1 see 
> the other side of the connection.
> The loadbalancing must be based on a hash built from at least the 
> mac-addresses+IP-addresses.
>
>
> So, what I think I'm looking for is a way to configure a lagg0 interface in 
> loadbalance mode, that take all the incoming traffic on mon0 and distribute 
> it over four virtual member NICs. (these four NICs would then probably be 
> configured to run in monitor mode.)
>
>
> Do FreeBSD support what I'm looking for? How do I do it? Where should I look?
>
> /Elof
>
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Since this is below one Gig, would running separate snort processes on
mon0 and using a BPF filter to split traffic work?

--Nikolay
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