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NAT: Same IPs, different states?

Last response: in Networking
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December 11, 2011 1:13:16 AM

I'm a simpleton when it comes to networking, as in, I don't understand...I just open my computer and am connected to the internet. So please, someone explain if this scenario is possible and in simple words. I have read other topics and don't understand the lingo or terminology but I'm not sure where else to ask this. Names have been changed.

Two separate people on a website I am a part of have the same IP address. They do not live in the same state. When I confronted them with this situation (I was concerned they were the same person), Susie told me that she was providing internet for Sally via this whole NAT thing. This would be from one private residence to another private residence. When I looked up the IP address, both locations in the two separate states show up.

Is this possible or is this person lying? Thank you.

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December 11, 2011 3:41:32 AM

UTlonghorns said:
I'm a simpleton when it comes to networking, as in, I don't understand...I just open my computer and am connected to the internet. So please, someone explain if this scenario is possible and in simple words. I have read other topics and don't understand the lingo or terminology but I'm not sure where else to ask this. Names have been changed.

Two separate people on a website I am a part of have the same IP address. They do not live in the same state. When I confronted them with this situation (I was concerned they were the same person), Susie told me that she was providing internet for Sally via this whole NAT thing. This would be from one private residence to another private residence. When I looked up the IP address, both locations in the two separate states show up.

Is this possible or is this person lying? Thank you.


What sight was it that you looked up there IP address, and have you tried a different sight?

I am not sure what they are talking about saying providing internet via NAT, if they are in completely different locations. It would make seance if there were neighbors, and Sally, was just sucking off of Susie WiFi.
They could be talking about Sally is using Susie network as a proxy, So all of Sally's internet traffic it going through Susie network, it would look to the outside as if Sally was at Susie's house using her network. And no one would be able to tell she it was somewhere else.

I don't know the how they track IP addresses based of location, because some ISPs used a dynamic IP addresses, So the IP address can change to different users. And it may have just switch to another user and a different state.

So my guess is that Sally is using Susie's internet as a proxy, and susie's network just changed to a new ip address that use to be in a different state. Would be my guess is to what has happened.
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December 11, 2011 1:43:17 PM

Quote:
Two separate people on a website I am a part of have the same IP address.
You didn't provide detailed info, but if their IP address starts with 192.168, then it's possible.
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December 17, 2011 12:07:01 AM

Sorry it took me so long...

No, the IP address does not start with 24.

Apparently, Susie is providing Sally with the internet via a wireless signal that is sent through a dish? It sounds absurd to me but I want to be solid if I am going to confront them/her. You can't send wireless internet...this NAT thing through a dish to a residence in a different STATE, can you??

Here's what she said, "Anyway the one to talk about the ip address stuff is (named edited) since it's set up at her house. All I know is the dish type thing extends it and the wireless router changes the ip addresses of the computer to match the ones of the wireless router so it looks like it comes from the same computer"

She also said:

"Well really quick we have four laptops in this house and we're the center of the family business. So we needed a wireless router and a way to make it reach a sizable distance. So we built a dish to broadcast the signal so our family and some friends can use our interenet. It appears we all have the same ip address due to NAT."
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December 17, 2011 1:35:43 AM

It depends how far they are. They could be in different states and almost neighbors. If you don't trust her/them then you probably should stay away.
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December 17, 2011 3:11:55 AM

They are about a 2-3 hour drive from one another. They are not next door neighbors. So, this isn't possible, correct? These are residences, not like...the military or something. I just want to be absolutely sure.
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December 17, 2011 5:01:28 AM

UTlonghorns said:
They are about a 2-3 hour drive from one another. They are not next door neighbors. So, this isn't possible, correct? These are residences, not like...the military or something. I just want to be absolutely sure.


Yeah that sounds very unlikely. You can send WIFI a few miles but you need special antennas and line of sight, to do it. Maybe you could do something with radios, like in the lower frequency ranges, I don't know much about that area, but if they could do it, my guess would it was be so slow it wouldn't be worth anything.

Basically if you want any useful internet you need line of sight it your sending it long range. That is why satellites are very useful because you can almost always get a line of sight on something in the sky, so you just send it up to to the satellites and they relays back to some where else. So unless they are like billionaires and own there own satellites, I think they are lying, or don't know what they are talking about.
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December 17, 2011 1:12:10 PM

UTlonghorns said:
They are about a 2-3 hour drive from one another. They are not next door neighbors. So, this isn't possible, correct? These are residences, not like...the military or something. I just want to be absolutely sure.

If they are that far, then it isn't possible.
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June 4, 2012 5:12:26 PM

GhislainG said:
Quote:
Two separate people on a website I am a part of have the same IP address.
You didn't provide detailed info, but if their IP address starts with 192.168, then it's possible.


These are private IP addresses. Border/edge routers will not pass these addresses onto the internet. If they did, we'd have seriuos problems. Your WAN address is what is seen on the internet.
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June 4, 2012 7:26:31 PM

The originating address can start with 192.168 as I've seen that before (a US ISP, but I don't remember which one). I could traceroute to the ISP, but I obviously couldn't access the PC having that IP address.
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June 5, 2012 9:31:17 AM

NAT stands for "Network Address Translation" and it is the processes by which IP addresses gets "translated" to and from public (IP address allocated to user by ISP) and private (user selected IP address within LAN) networks.

If they are showing up as the same IP address, that means they are using the same public IP address, which is given out by an ISP.

Local IP addresses are typically bound to a single user internet account and locale (unless notice is given of change of address etc).

So if you see the same IP for both individuals I would think they that:

1. They are both using the same internet account, thus same local IP, and it has gone undetected by the ISP. (not sure if this is even possible, but worth mentioning)

or

2. A VPN is set up so person A is tunneling a channel to person B's network and using their internet. (completely pointless and illogical)

or

One of the possibilities other users have mentioned in the forum

or

None of the above

It is certainly an odd case and quite amusing to think about
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