If you IP address isn't fixed how can they block you?

Question

Some companies stop you registering more than once with them by logging your IP address so that if you 'try again' they can block you.
My question is this: If your address isn't fixed - which they usually aren't - how can they do this because if you try again you may be coming from a different address?

Answer 1

Although IP addresses usually aren't technically "fixed", they do stay with you for as long as your logged in. So if you have a constant internet connection like dsl or cable, then your IP stays the same until you manually disconnect.

There are also other ways to identify a computer besides IPs, such as using cookies, or analyzing a computer's structure (Microsoft's preferred method).

Answer 2

Your Modem has a seperate MAC address as well as your network card. Your IP if dynamic has a lease for a certain period of time usually a month, give or take a few weeks and must renew an IP address from your ISP. Static is like dial up, changes everytime a connection is made to the internet..

Answer 3

Companies can get a lot of information about your computer. The information can be as granular as a MAC Address which is normally unique on most end user computers. They can also place a bit of code on your computer to identify you.

Answer 4

They can also block your network device's MAC address, which is unique only to each device that connects to a network.

(If you are using a router, it may be blothing that MAC, if you're connected straight to the internet, it could be your network/wireless card).

Answer 5

their system is set to recognize the same i p address if it,s entered more than once, it tell them where the transmission originated from the previous time.

Answer 6

See the answers at your first posting of this question a couple of minutes ago!!!!!!
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