Blackjack Posted August 2, 2003 Share Posted August 2, 2003 Yeah I was wondering is there any way someone can duplicate an IP address? I mean, is there a program that can make this possible? Link to comment Share on other sites More sharing options...
Novex Posted August 2, 2003 Share Posted August 2, 2003 nope, there can only be one of each IP Address on the same network Link to comment Share on other sites More sharing options...
John Veteran Posted August 2, 2003 Veteran Share Posted August 2, 2003 you can have the same IP address in different subnets, but that's a pain to set up. why do you ask? Link to comment Share on other sites More sharing options...
Blackjack Posted August 2, 2003 Author Share Posted August 2, 2003 Different subnets? Well, I wanted to know because on this page I went to, my friend was posting messages on a board and it showed his IP. Then someone else different posted and it had the same IP. Well, technically it wasn't the same because the last 3 digits of the IP are blocked while the rest were exactly the same. I was thinking, could it be the same? Could someone be imitating or copying IPs? I mean, besides the last 3 digits, what are the chances of 2 people on the same board having the other numbers of the IP identical? So this led me to believe there might be a program for duplicating IP addresses. Link to comment Share on other sites More sharing options...
OPaul Posted August 2, 2003 Share Posted August 2, 2003 The chances are high, a lot of people now are using cable internet and their IP address in the US will be similar. It could just be that the two people happen to use the same company to access the Internet. Link to comment Share on other sites More sharing options...
Winston Posted August 2, 2003 Share Posted August 2, 2003 yes thats how cable operates, for my knowledge that is, the first 3 parts of the IP are the same, and the last part differs, that is why some anti-ISP likers who enjoy attacking the company, can easily randomize and hack anyone randomly, they just make up the last part up and try it, so its really an unsafe factor IMO, but since the inception of IPv6 is appearing, this risk issue should be eventually lowered Link to comment Share on other sites More sharing options...
dangman Posted August 2, 2003 Share Posted August 2, 2003 It's normal, me and my friend were just talking about this the other we both use Comcast and the first two sections of our IP'S are the same 127.151 Link to comment Share on other sites More sharing options...
poind Posted August 2, 2003 Share Posted August 2, 2003 As far as I understand, you can at least be almost certain the person had the same local internet provider. Depending on how the provider handles dynamic IP's and the like and how often they turn over, it might simply be another on the same network who connected around the same time as your friend. It's a small world. Coincidences happen. People with similar interests are more likely to overlap and bump into each other than not. Very very doubtful (most would say impossible no matter what) that the IP's were exactly identical. Personally, I'm unaware as to how someone could forge an IP that's already in use. Link to comment Share on other sites More sharing options...
Samoa Posted August 2, 2003 Share Posted August 2, 2003 it's a small world dude, especially on the internet. Ask those Chinese who are using up theirs...LOL. Link to comment Share on other sites More sharing options...
Almighty1 Posted August 9, 2003 Share Posted August 9, 2003 A easy explanation is that it's called a CIDR/24 or Classless Internet Domain Routing. CIDR means there are 256 IP addresses since the first three numbers would remain the same. A CIDR/23 would be two CIDR/24 so for example, one can have 1.2.3.x and 1.2.4.x. Each of the four numbers count from 0-255. Then someone can have a block that covers everything under the first 2 numbers. Link to comment Share on other sites More sharing options...
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