Topic awaiting preservation: can somebody tell me about internet IP addresses?

is it possible for two people in different countries to have the same internet IP address? (at the same time?)

forgive my ignorance, but i know it's not poss to have the same computer IP, and from what i've read so far, computer IP and internet IP are different, right?


hhhmm....

Nope, IP addresses are unique.
If you have a dynamic IP ( not the same at every connection ), it means that your ISP has a range of IP addresses available and assigns one to you at your connection.

Some ranges of addresses are reserved for certain countries/areas/organisations/purpose ... For more infos : wikipedia: IP address

thanks Poi.. that's what i thought..

so basically, if you've got two people posting on your message board, claiming to be in different countries.. if their IP addresses are the same, they're LYING right?

Yessir.

LaSun: Yep. The chance that two people using an ISP giving dynamic IPs gets the same IP is *really* thin. Still, to have the same IP, you must either use the same computer or be behind a proxy ( which is the case in many schools, enterprises, ... ).

Yes and no...

Yes:
1) if they are both on an local different network which is connected by a router/gateway to the internet
2) If one of them is spoofing an IP address

No:
When they are on the same network (eg internet) they need to have an unique IP adres

Here is some info on spoofing
An old paper about setting up IP Spoofing
Spoofing according to ISS
Definition by SecurityFocus---> good reading

However as i understand you could only use one traffic with IPspoofin techniques it would be pretty hard to post on forums...

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Support Justice for Pat Richard

Actually it's not that bad. Like Rinsewind said if they are behind the same corporate, university NAT then IP's would be shared.

Also if running through a proxy.

and I'm repeating everyone.

But basically it's not terrible if you see matching IPs there's many legit reasons for this.



.:[ Never resist a perfect moment ]:.

(Edited by bitdamaged on 04-03-2005 03:02)

Do a traceroute and see what comes up. Or tell us the IP address, and I am sure someone would be quite quick to tell you anything they could figure out.

The odds are they are lying though.

Jason

the offending IP address: 65.61.105.48

wow, this is the first i've heard of 'spoofing' .. fascinating.

in this case, i'm pretty sure the person/post-er in question is at a university (Washington state?) so at first i thought it was innocent - a bunch of people using a computer lab .. until they started claiming to be in different countries, hehe..

we've got 8 aliases from this IP so far, and counting - a new one seems to materialize every few days. my real concern is that, if this isn't a simple case of multiple personality disorder or an immense yearning for attention (because all the aliases tend to sing the praises of the first one), there could be a more malicious reason for the lying.

thanks you guys ..

<edit> i've outgrown my sig </edit>

(Edited by LaSun on 04-03-2005 05:12)

65.61.105-48.ptr.llix.net (65.61.105.48)

65.61.96.0 - 65.61.127.255
Liberty Lake Internet Portal
23403 E Mission
Spokane, WA
US

LLIX IP Admin
admin@llix.net
+1-509-688-2575

65.61.104.0 - 65.61.107.255
Community Cable Service
729 S. Bernard
Spokane, WA
US

LLIX IP Admin
admin@llix.net
+1-509-688-2575

QUOTATION: "If you're too open minded, your brains will fall out."