blocking a users IP

[bump909]

I wish to block a user from obtaining quotes from my site. I gather that I can obtain their IP address by using the $REMOTE_ADDR variable then block accordingly using a simple if-else statement. However (correct if if i'm wrong), If the IP address is dynamic the script would be useless.

I have tested obtaining IP addresses from my own P.C/Router and the last 2 - 8 bit digits seem to be dynamic and change each time the router is reset. i.e, 81.132.xxx.xxx. The xxx.xxx values change each time. While the 81.132 remain static.

Knowing this, I could rewrite the script to block users using the the 1st 2 - 8 bit values, e.g 81.132 but am curious that this may also block legitimate users.
What would be the ideal solution?

Any help is grately welcomed.

[Roger_Ramjet]

Of course it will. It will block everyone on the 81.132 network: 65,536 IP addresses

[bump909]

So what would you recommend for denying individuals or is it not possible? I'm not that IP Savvy

[rehfeld]

you can set a cookie too, but all they need to do is clear thier cookies, so it would only help against those who wouldnt think of clearing thier cookies....

make users log in and confirm an email address. then you can block thier username.

[bump909]

Yes, this is probably a better option even though they could re-register under a different username and email.