Re: daq inline and ipfw does not support ipv6?

[Russ Combs <rcombs () sourcefire com>]

On Fri, Feb 4, 2011 at 10:31 AM, Michael Scheidell <
michael.scheidell () secnap com> wrote:

>  being as the last /8 ipv4 block has been assigned, I think it might be
> time to make sure everything worked with ipv6, so we can fix it if it
> doesn't
>
> I noticed on snort manual section 1.5.6, IPFW that it seems to indicate
> that the ipfw module does not support ipv6.  Is this something *BSD needs to
> fix? or snort?

This looks like a divert design issue.  IPPROTO_DIVERT is defined as an
alternative to IPPROTO_IPV4 and IPPROTO_IPV6, so only ip4 traffic is
received on the divert socket because there is no way to differentiate it
(ie "raw" ip4 packets are received w/o layer 2 header).

> IPFW is available for BSD systems. It replaces the inline version available
> in pre-2.9 versions built with this:
>     ./configure --enable-ipfw / -DGIDS -DIPFW
> This command line argument is no longer supported:
>     ./snort -J <port#>
> Instead, start Snort like this:
>     ./snort --daq ipfw [--daq-var port=<port>]
>     <port> ::= 1..65535; default is 8000
> * IPFW only supports ip4 traffic.
>
> platform is freebsd 7.3, amd64, but I am not sure that affects the manual.
>
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The modern datacenter depends on network connectivity to access resources
and provide services. The best practices for maximizing a physical server's
connectivity to a physical network are well understood - see how these
rules translate into the virtual world? 
http://p.sf.net/sfu/oracle-sfdevnlfb

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