em0 hijacking traffic to port 623

Ian FREISLICH ianf at clue.co.za
Tue May 22 05:04:09 UTC 2007


Sten Spans wrote:
> On Mon, 21 May 2007, Ian FREISLICH wrote:
> 
> > Hi
> >
> > We've noticed an issue on our firewalls where the first em device
> > in the system hijacks inbound port 623 tcp and udp.  The OS never
> > sees this traffic.  Interestingly, em1 and em2 do not appear to be
> > afflicted by this problem.  Some reading I've done points to a
> > similar conclusion:
> >
> > http://blogs.sun.com/shepler/entry/port_623_or_the_mount
> >
> > I've looked at the bios, but I can't find any settings that remotely
> > hint IPMI or RMCP+ or serial-over-lan.
> >
> > Does anyone know how I can stop the card or system from stealing
> > port 623 in hardware or must I just stop using em0 (and/or Intel NICS)?
> 
> Does "ifconfig em0 promisc" help ?
> That fixed firmware related vanishing ipv6 packets on fxp and em.

They are already in promiscuous mode due to carp.

Ian

--
Ian Freislich



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