On 08/30/2012 12:19 PM, Marko Vojinovic wrote:
Suvayu Ali is a particle physicist at the NIKHEF National Institute for Subatomic Physics in Amsterdam, Netherlands. He is working in a group for Marcel Merk, collaborating on the LHCb detector experiments which are going on now at the LHC collider in CERN. It is quite often that collaborators from various institutions around the world come to CERN every now and then. So did I several years back. :-)
Thank you. I doubt that most of us were aware of that. And, it does explain very nicely why he's not at all surprised to learn that his public IP is owned by CERN.
Besides, when you happen to be on a random place in the world and do a DHCPDISCOVER, you typically will not get an answer from 137.138 dhcp servers, unless that random place is an office in CERN.
Not unless it's very, very badly misconfigured, that's for sure. Back when I did tech support for an ISP, I'd occasionally run across a LAN that wasn't originally intended to be connected to the Internet, and had been set up with a random subnet, generally one that was actually assigned to some company somewhere.[1] I always made sure to explain to the callers that this might cause problems in the future, especially if they actually needed to connect to the company in question, and suggested that they have somebody local reconfigure things properly.
On an off-topic note, does anybody know for sure what would happen? I've always assumed that the site would be unreachable, but I've never had the nerve to set things up that way and find out.
[1]There was a time when many routers came with setup instructions that said that if you're not connected to the Internet, it didn't matter what IP range you used.
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