So what are the chances that say, on my one board site, two people would have the same IP address? They still could be different people, right?
Thing is, my board is small. Only about 40 or 50 regular posters. What are the chances that two different people would have the same IP? I guess it is possible if they’re using the same proxy to surf by, but what are the chances of that?
Haha, well I know thaaaaaaat. But these are two people who have always claimed to be two DIFFERENT people (and I’m pretty sure they’re different people) so how is it possible they’d have the same IP? And I’m talking exact match…no numbers are different.
ETA: They’re also two different people who have their location listed as being in different states.
Because they use the same ISP and the ISP gates their traffic out of the same box. The ISP can keep it straight using Network Address Translation, but you don’t have that option and so see those two different people as coming from the same computer. I don’t know if this is still true, but for a while all AOL users looked like they were in Georgia regardless of where in the country they actually lived because all AOL traffic entered the real Internet from machines in Georgia. Having some ungodly number of AOL users sharing the same IP address is hardly difficult to imagine.
Again, I have about 40 or 50 posters registered at my boards. Only about 20 or 25of them post daily, though. So, with knowing these numbers (I don’t know if that would change the odds or not) would you say that two of them having the exact same IP address is good odds?
Because it’s hard to read your answer here. Within the bounds of reason as in someday we may have another world war is within the bounds of reason or tomorrow your next-door neighbor may have breakfast bounds of reason?
Knowing what name the IP address resolved to would help. (A college address, generic ISP, proxy, etc.) Try one of the many online tools available. A quick Google search gives this useful site.
You aren’t going to get duplicate IP addresses with a modern service provider. The only reasonable scenarios I see are that they are behind the same NAT (in a house or office) or they happen to connect first to, say, a university machine and then head out to the web. How likely these are will depend on what your board is, what the users’ backgrounds are, etc. There’s no way to assign a probability in general. (A board about life at IBM might be more likely to have multiple people coming from a central machine. A board about mustard might be less likely.)
Can you provide more info (both about the board and its users and also about the IP address?)
I’ve seen two different users on this board who used the same proxy/anonymizer over two months apart and had the same four number match. And I KNOW they live 1000 miles apart and aren’t the same person.