IPs are unique for each user...

  • Bogey
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Post 3+ Months Ago

...right?
  • Anonymous
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Post 3+ Months Ago

  • Don2007
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Post 3+ Months Ago

IP's are unique for each machine (NIC).
  • joebert
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Post 3+ Months Ago

You might want to elaborate on what you're concerned about Bogey. :)
  • ATNO/TW
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Post 3+ Months Ago

Yeah, ditto Joe. IP's can be the same if the users are visiting/posting/whatever from the same household/coffee shop or so-have-you. For example, if I'm playing poker in the same house as my girlfriend, it recognizes my IP as being the same as hers and won't let me play at her table. So I have to remote into work to play so I have a different IP than her. External HTTP scripts don't read internal IPs They read the external.

And Don, sorry to contradict you, but yes, IP's may be different from each machine (internally), but externally 5 machines in the same household can be perceived as having the same IP (e.g. the IP assigned by the ISP to the modem)
  • Bogey
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Post 3+ Months Ago

I wondering if the IPs I get from PHP is unique for each computer...
  • Don2007
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Post 3+ Months Ago

ANTO/TW You are talking about external IPs & perceived is correct but in actuality, no 2 machines should have the same IP.

Bogey, are you looking at your web site logs? Are those the IPs in question?
  • Bogey
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Post 3+ Months Ago

I'm talking about $_SERVER['REMOTE_ADDR']... does it give a unique IP for every computer or not?

If not, is there a way to do such a thing?
  • TopTraffic
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Post 3+ Months Ago

it all depends from the point of view.
Lan Wlan ..Internet
basically every computer have a MAC address 4 digit producer +4 digit series. In the same network you can't have 2 computers with same ip.If the server is dhcp ..no way. If ip are static you can force 2 computers to have same ip but it will be a conflict and either one by one are going to have connectivity or none.
On Internet...2 users can have the same ip.
Why?
because of the ip's of users on Internet are normally the ip from their Internet provider. So 2 guys are in a WAN and have same provider. There is a chance that they have same ip outside to Internet
  • joebert
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Post 3+ Months Ago

If you search for "aol same ip" you'll find a bunch of 5+ year old posts on numerous message boards where people try to work around the problem of AOL reporting the same IP address for multiple people.

You've probably seen notes in emails you've received at least once along the lines of the following, because of that same IP address issue if I remember right.

Quote:
If you are an AOL subscriber, click here instead
  • Bogey
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Post 3+ Months Ago

TopTraffic wrote:
So 2 guys are in a WAN and have same provider. There is a chance that they have same ip outside to Internet

So, IP tracking isn't always accurate?
joebert wrote:
If you search for "aol same ip" you'll find a bunch of 5+ year old posts on numerous message boards where people try to work around the problem of AOL reporting the same IP address for multiple people.

You've probably seen notes in emails you've received at least once along the lines of the following, because of that same IP address issue if I remember right.

Quote:
If you are an AOL subscriber, click here instead

So, IPs are probably not the best way to handle log-in functions :lol:
  • Don2007
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Post 3+ Months Ago

Quote:
So 2 guys are in a WAN and have same provider. There is a chance that they have same ip outside to Internet


You mean, two guys on a LAN have the same provider. Then it might appear that they have the same IP, not 2 guys on a WAN.
  • Bogey
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Post 3+ Months Ago

Thanks guys for helping me out here... I really appreciate it.

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