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VPN and IP addresses

post #1 of 12
Thread Starter 
Hey guys. I know close to nothing about networking. So, I seek the experts.

I have a VPN. If I disconnect it and then reconnect it, it will give me a slightly different IP address (last 3 digits changed) which I check and verify through a site like whatismyip.com. For example:

289.147.101.118 initial
289.147.101.124 after disconnect and reconnect


When I check my IP through whatismyip.com, it is checking my external IP address. If the two IPs above were internal local IPs then to a website like Target.com, it would see the same external IP address even if the two interrnal IPs were slightly different. So now my question is, because whatismyip.com is revealing two different external IP addresses, would a website like Target.com, when tracking a visitor, see the visitor as two different people or would they know that it's the same person if the addresses are identical except that last 3 digits? This is assuming that cookies in the browser are cleared and that there are no stray cookies.

Thoughts?
post #2 of 12
It would see 2 different users as your IP address is changing.

In a VPN, you tunnel to a secure server, and access services from that server (kinda like a proxy) . That server will only have a certain IP range to hand out addresses for, which is why the IPs seem similar.
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post #3 of 12
Thread Starter 
Quote:
Originally Posted by fluxlite View Post
It would see 2 different users as your IP address is changing.

In a VPN, you tunnel to a secure server, and access services from that server (kinda like a proxy) . That server will only have a certain IP range to hand out addresses for, which is why the IPs seem similar.
Thank you sir for the quick reply. I repped you. I originally was using a proxy but many of the free proxies did not work out for my needs (cannot log in to sites with log in, and massive ads + questionable security issues).
post #4 of 12
Quote:
289.147.101.118
I'm assuming you changed this for whatever reason.

Your provider likely has a pool of external IP addresses. You can be assigned them at random depending on when you bring up your VPN tunnel or depending on how they have NAT established. These are indeed external IP's. The only 'tracking' that would be applicable to you at this point would be through cookies. As stated, if you cleared them then you would indeed appear to be two clients.
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post #5 of 12
Thread Starter 
Quote:
Originally Posted by beers View Post
I'm assuming you changed this for whatever reason.

Your provider likely has a pool of external IP addresses. You can be assigned them at random depending on when you bring up your VPN tunnel or depending on how they have NAT established. These are indeed external IP's. The only 'tracking' that would be applicable to you at this point would be through cookies. As stated, if you cleared them then you would indeed appear to be two clients.
I appreciate the assurance sir. Repped you as well. Is it safe to conclude that browser-included cookies that one can clear in firefox as well as clearing flash cookies through adobe's page, is sufficient in eliminating tracking cookies? Do websites use another common cookie that I have not mentioned?
post #6 of 12
That's pretty much it as far as cookies are concerned.

If you are really paranoid you could always browse in a VM
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post #7 of 12
Quote:
Originally Posted by beers View Post
That's pretty much it as far as cookies are concerned.

If you are really paranoid you could always browse in a VM
Or use tor in a vm and disallow all cookies and scripts
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space heater
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S-HVH-01
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Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
Hard DriveHard DriveOptical DriveCooling
8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
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8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
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post #8 of 12
That's weird. I'm not convinced an ISP would dynamically changes your IP address when you create an ISAKMP tunnel. That's pretty shady.
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post #9 of 12
Quote:
Originally Posted by scottsee View Post
That's weird. I'm not convinced an ISP would dynamically changes your IP address when you create an ISAKMP tunnel. That's pretty shady.
Once the tunnel is established his IP outside of the other end of the VPN changes, is what he is describing.
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post #10 of 12
Yep I've tested 3 or 4 vpn services and they all had huge pools of ip addresses so my ip would be different every time I connected.
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