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access to file sharing when Ethernet "OFF" why?
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Dedicated MacNNer
Join Date: Oct 1999
Location: Raleigh, NC, USA
Status:
Offline
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I have a new Mac Pro. It has a network control panel with features I don't remember having in my 10.5.1 equipped PowerMac G5.
One feature I played with was the ability to turn OFF an Ethernet port. I created a "Location" called "no network". In it I turned OFF ethernet1 and 2 and firewire and was no longer able to access the internet as would be expected. But for some reason one of the other Macs in the house shows up in Finder and I can get to its file system! Why?
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Dedicated MacNNer
Join Date: Oct 1999
Location: Raleigh, NC, USA
Status:
Offline
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Here is an image showing a copy in progress while disconnected.
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Mac Elite
Join Date: Apr 2000
Location: Los Angeles, CA
Status:
Offline
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Your screenshots don't show Airport in the list, so I'm assuming that it isn't connected to your wireless network. Maybe the connection is just cached though? If not, and you're really able to navigate the filesystem and even do file transfers, it's probably on the network somehow. ping/ssh/tcpdump/etc should be able to tell you what's going on.
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Professional Poster
Join Date: Sep 2002
Location: New York, NY
Status:
Offline
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Your first screenshot shows the Apply button is active. Have you actually applied the location change?
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Vandelay Industries
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Dedicated MacNNer
Join Date: Oct 1999
Location: Raleigh, NC, USA
Status:
Offline
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ginoledesma: I'm pretty sure this Mac Pro doesn't have airport (I didn't order it with it, it shows as "No Information Found" in the System Profiler; none of the networks nearby are open; I can't find Airport anyplace in the Network system preference panels).
Art Vandelay: Perhaps not that time. This is very repeatable.
ginoledesma: I started a ping to Stephen-Hawking.local in terminal and left it running. When I changed my 'location' from automatic to 'no network' the ping immediately changed from
64 bytes from 192.168.3.5: icmp_seq=58 ttl=64 time=0.273 ms
64 bytes from 192.168.3.5: icmp_seq=59 ttl=64 time=0.369 ms
64 bytes from 192.168.3.5: icmp_seq=60 ttl=64 time=0.214 ms
ping: sendto: No route to host
ping: sendto: No route to host
ping: sendto: No route to host
as one would expect. Shortly after that I got a disconnect notice (I think it may have been Server Connection interrupted" but i didn't write it down fast enough) from finder. But then when I reselected Stephen-Hawking from the finder side-panel it went ahead and showed me the file system again. The Activity Monitor showed a leap of activity from zero to hundreds of KB/sec and I was again able to select a random application from Stephen-Hawking's Applications folder and copy it. Even as this is going on ping: is showing no route to host.
ginoledesma: Thanks for the ping and tcpdump suggestion. Can you give me a more on using tcpdump? it wasn't particularly obvious from the man page and just typing it gave me a "tcpdump: no suitable device found" whether the network was connected or not.
By the way, after setting the network to "no network" and ping died, I could still copy GarageBand from Stephen-Hawking's Applications folder. While this was happening Activity Monitor showed 100baseT levels of activity. I reached around behind the Mac Pro and yanked the ethernet cable. The activity level on Activity Monitor dropped immediately to zero.
Tadd
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