[HECnet] Connections?

[Mark Pizzolato]

On Saturday, May 5, 2018 at 3:11 AM, Dave wrote:
> OP here, if both the host and the SIMH guest are listening for SSH traffic on the
> same interface / IP address then only one of them is going to make the
> connection. Since the SIMH guest is the last to register, it gets the traffic.

A simh guest and the host system may be transiting traffic through the same 
physical network interface, but they each are using separate (unique) MAC 
and IP addresses for their traffic.  As such this analysis is incorrect unless
you're using a more complicated NAT setup on the simh side.  NAT is more 
complicated due to the need to setup NAT for a specific incoming port 
mapping which must be unused on the host system.  Doing this SSH into the
guest would be possible, but not really related to the original discussion.

- Mark

> On Saturday, May 5, 2018 at 3:27 AM, Johnny Billquist 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
>