> From:          Richard Gambrell <[log in to unmask]>
 
> I'm sending this to the list, since the question was asked on the list,
> but many of you already know this, so you might want to skip it.
>
> >
> > > Yes. Works great.  One note, however, your 3000 DTC network traffic will
> > > be repeated over the LAN network and the other way around, also, LAN traffic
> > > over the DTC network. This will be ok unless you have network bandwidth
> > > problem or you have security concerns about the DTC packets being "seen"
> > > from a PC running network analzer software. Since the data in the network
> > > packet is in plain text, this can be an easy security breach.
> > >
> > Could you explain this a bit more?  Does this apply to any hub connected
> > to the HP3000?
> >
>
> Any ordinary hub connected to the same coax with the DTC and HP3000 will
> repeat on each port (of the hub) all the data packets sent over the network,
> no matter what the origin or destination of the data. This includes all data
> going between the DTC and the HP3000, basically, anything anyone types or
> sees at a terminal connected to the DTC, or in any session from a PC connected
> to the LAN. It is relatively easy to see this data from any connection to
> the LAN. A router or bridge (usually) will stop this free distribution of
> all packets between the network segments connected to each side of the
> bridge or router.
[lots of good stuff snipped]
 
Thanks for your reply, Richard.  So, if you have a PC network connected
to an HP3000 with a simple dumb hub a serial connection is no more secure
than a network connection.  Good to know, before going very far in that
direction.
 
Shirl