[Simh] Klh10 vs Simh

[Johnny Billquist]

On 2016-02-27 17:53, Michael Kerpan wrote:
> It's not that multiuser is impossible using KLH10 networking emulation
> and native TOPS-20 TCP/IP, it's that it's a lot harder to set up than a
> SIMH virtual multiplexer. Wifi (under Linux at least) doesn't play all
> that well with bridging and virtual networking stuff, which makes
> setting up networking in KLH10 nigh impossible for those of us stuck on
> wireless. I can't even really set up a VM and run KLH10 in a guest,
> because Virtualbox's bridged mode doesn't work for me. Additionally, the
> idea of putting anything running a 30 year old TCP/IP stack onto the
> Internet scares me, even if the folks at twenex.org <http://twenex.org>
> have done so.

The WiFi problem is easy to solve. It's called a router. Your host 
routes IP between the WiFi interface and the virtual network the host 
and your virtual machine shares.

Trouble setting up networking on the virtual machine? Maybe. But this 
boils down to - if you want to run that host, you should learn how to 
manage it.

Security issues are mostly non-issues. How many script kiddies today 
even know what a TOPS-20 host is. There are most certainly 
vulnerabilities, but they are very different from the ones presented by 
modern machines.

I have an RSX system on the Internet, and it gets constant probing over 
telnet and http, but they are all probing in ways that just don't make 
sense. So I have never felt more secure.

	Johnny

>
> Mike
>
> On Feb 26, 2016 8:46 AM, "Johnny Billquist" <bqt at softjar.se
> <mailto:bqt at softjar.se>> wrote:
>
>     On 2016-02-25 20:07, Timothe Litt wrote:
>
>         my employer's views, if any, on the matters discussed.
>         On 25-Feb-16 13:48, Michael Kerpan wrote:
>
>             I've been hoping for a KL simulation in SIMH for a while.
>             KLH10 lacks
>             support for things like serial over Telnet which means that
>             multiuser
>             is essentially impossible on KLH10 without all kinds of
>             networking
>             mojo. Sadly, I don't have the skill to actually write such a
>             beast,
>             I'm of no use except as a data point regarding interest in
>             such a
>             development.
>
>             Mike
>
>         If the recently promised release of Linux code for DECnet/LAT
>         materializes, you'll be able to
>         connect to KLH10-based machines with as many connections as you
>         can keep
>         track of.
>
>         Both TOPS-10 and TOP-20 on the KL supported LAT, and of course
>         DECnet
>         NRT and CTERM.
>
>
>     ...and telnet. So, (as also Rich pointed out), what is the problem
>     actually? Are people so limited in their mind that they only think
>     that they can use telnet if the simulator have a telnet to serial
>     port connection, and do not think that the OS itself actually can do
>     networking... (with many different protocols)
>
>              Johnny
>
>
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-- 
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