[Simh] simh and tap device under linux

[David Holland]

SSH is available for VAX/VMS, in the form of Process's TCPWARE product.

However, depending on your underlying hardware, it can be pretty slow.

(ie: 1.4Ghz is NOT enough.)

On Tue, Aug 25, 2009 at 1:15 PM, Edward Berry<eaberry1 at pacbell.net> wrote:
> If the machine is always on and networked
> (as opposed to each user turns it on to run simh), you can
> run simh yourself as superuser and have others telnet in from nearby
> (same subnet) machines. The ^E command will be unavailable,
> the users will be restricted to commands of the simulated OS.
>
> I like to start simh in a "screen", then detach the screen if I need to
> leave or logoff.
>
> Since telnet sends cleartext passwords, allow telnet only from local
> subnet where you are sure there are no password sniffers. Or is SSH
> availabe for vms?
>
> Ed
>
> Howard M. Harte wrote:
>> Those techniques will work, but the user will be able to CTRL/E and '!
>> sh' to get a root shell.  You might want to disable the '!' command.
>>
>> -Howard
>>
>>
>> On Aug 24, 2009, at 9:44 AM, Seth Morabito <sethm at loomcom.com> wrote:
>>
>>> On Mon, Aug 24, 2009 at 12:08 AM, <ttmrichter at gmail.com> wrote:
>>>> Now the million-dollar question: is there any way to set this up so
>>>> that I
>>>> don't have to give someone full-on God Mode privileges to run the
>>>> emulator
>>>> properly? I'm not so sure I want to give this thing access to
>>>> everything on
>>>> my system at this time.
>>> There are two possible techniques. The first is changing the ownership
>>> of the executable to 'root' and setting the suid bit. For example:
>>>
>>> % sudo chown root pdp11
>>> % sudo chmod u+s pdp11
>>>
>>> This will allow anyone with rights to execute the program to run it as
>>> the root user.
>>>
>>> The other technique works as long as you have 'sudo' installed. You
>>> can add a line to your /etc/sudoers file to let a normal user (login
>>> 'foobar') run the executable as root:
>>>
>>> foobar           ALL=NOPASSWD: /path/to/pdp11
>>>
>>> Then the user 'foobar' just has to type "sudo pdp11" to get it to run
>>> with root privileges. Other users won't be able to, only 'foobar'.
>>>
>>> Both techniques are a security risk, but as they say, life involves
>>> risk. :-) Only you can decide how much security trade-off you're
>>> willing to live with.
>>>
>>> -Seth
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>>>
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