Re: One NIC on public side

[Martin Visser <martinvisser99 () gmail com>]

Using a hub that runs with ports at half-duplex and a having a PC with a
port set at full-duplex *will* cause packet loss. A PC configured to
full-duplex has collision detection disabled, so if a collision does occur,
the PC will not know about it and not retransmit the lost frame.

This used to be a common problem but is increasingly rarely seen in the wild
(because of auth-negotiate being the default on switches, and gigabit NICs
which are recommended to be configrued as auto).

Regards, Martin

MartinVisser99 () gmail com


On Sat, May 15, 2010 at 11:32 PM, Richard Bejtlich <taosecurity () gmail com>wrote:

> Hello,
>
> Using a hub does not cause packet loss due to collisions.  Half duplex
> Ethernet was designed to deal with collisions.
>
> Sincerely,
>
> Richard
>
> On 5/13/10, Boonie <newsboonie () gmail com> wrote:
> > > So, disabling some of these protocols will allow me to safely connect it
> > > on the public side again then?
> >
> > Without IP, I do not see how these other protocols will reach another
> > machine. But, just disable all of them.
> >
> > Are you sure you want tu run all traffic through a hub? This might lead
> to
> > packetloss due to colissions.
> >
> > Dave
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