[Simh] Klh10 vs Simh

[Sampsa Laine]

> On 28 Feb 2016, at 16:47, Andreas Davour <ante at Update.UU.SE> wrote:
> 
> On Sat, 27 Feb 2016, Johnny Billquist wrote:
> 
>>>> 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.
>>> To Johnnys suggestions I might add that (I don't know exactly what
>>> problems you're having) maybe openvswitch might help out?
>> 
>> The problem is that WiFi is not really like ethernet (I think we covered this a month ago, but maybe it was on a different list). Anyway, if you have a simh instance using WiFi for the network, it do not work, since putting the interface in promiscuous mode, and pretend you have a second machine with a different MAC address do not work, since with WiFi, the base station actually knows which MAC addresses are connected, and if a packet comes in for a device for which the MAC address is not registered, the packet will not be send out over WiFi, so you will not get anything, even though you think you have your interface in promiscuous mode, and are sending packets out with a different source MAC address, which you might think the WiFi switch would learn, as it would had it been ethernet.
> 
> ah! That do sound familiar. I think it was indeed discussed on this list recently. Openvswitch might be useful in the general case, but maybe not for wifi.
> 

Actually DECNET over Wifi does work - if you turn off all security, then the WAP just acts like an Ethernet hub.

Whether this is feasible (i.e. you live in the middle of nowhere) is another question.

Sampsa



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