[HECnet] Connections?

[Mark Abene]

Nothing of the sort. I'm saying that in the past, you couldn't telnet to an
emulator's IP address from within the same host server. Naturally the host
server has multiple IPs for all the emulated guest OSes. This was a well
known and well documented peculiarity of BSD and Linux when logged into a
shell on the host server. It's no longer the case on more recent Linux
systems.

-Mark


On Sat, May 5, 2018, 10:56 AM Mark Pizzolato <Mark at infocomm.com> wrote:

> Hi Mark,
>
>
>
> I’m not understanding what you saying here.
>
>
>
> Are you suggesting that on a single host system, you’ve got multiple
> independent simulators running which all are using the same IP address as
> the host system? And, if true these devices can then, not only uniquely
> communicate with remote systems (on the Internet say), and also to each
> other AND the host system?
>
>
>
> -          Mark
>
>
>
> *From:* owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] *On
> Behalf Of *Mark Abene
> *Sent:* Saturday, May 5, 2018 10:45 AM
> *To:* hecnet at update.uu.se
> *Subject:* Re: [HECnet] Connections?
>
>
>
> This is an often misunderstood generalization, with some people able and
> others not. I remember this being true on *BSD. You could not connect to a
> simulated IP on the same host. It *used* to also be true on Linux, but is
> no longer the case for some time. On my ubuntu server where I run dynamips,
> simh, and klh10, all on bridged taps, I can telnet to all instances, even
> locally.
>
>
>
> -Mark
>
>
>
>
>
>
>
> On Sat, May 5, 2018, 12:27 AM Johnny Billquist <bqt at softjar.se> wrote:
>
> On 2018-05-05 03:39, Robert Armstrong wrote:
> >>since once Multinet grabs the interface, I can’t get to the underlying
> > host.
> >
> >    Actually I think it’s a limitation in simh and the pcap library – the
> > simh guest OS can’t talk to the host OS on the same interface.  You can
> > work around the problem with a TAP device.  Check the archives for the
> > simh mailing list – it’s been discussed many times before.
>
> No. That is not correct. I run simh myself on a machine where I have
> both the native host and simh talking on the same ethernet. And they are
> both reachable by other hosts.
> The OP must be doing something else funny.
>
>    Johnny
>
> --
> Johnny Billquist                  || "I'm on a bus
>                                    ||  on a psychedelic trip
> email: bqt at softjar.se             ||  Reading murder books
> pdp is alive!                     ||  tryin' to stay hip" - B. Idol
>
>
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