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Windows 7: how to change a Dynamic ip address in windows 7?

07 Jul 2010   #11

Windows 7 Ultimate x64

I posted this before in another thread a few months back and will repeat it here since it's applicable.

Originally here: Dynamic IP's
Ok, quick lesson on DHCP for you.

When you first turn on your computer, it broadcasts for a DHCP address. When the DHCP server gets the request, it only sees the MAC address (Physical Address) and records the MAC address and assigns a DHCP address to it.

That DHCP address is given for a certain lease time. Let's say it's 4 days. So, 5 hours later, you reboot the computer, it broadcasts again for an address and the server notices that it gave the address of previously to this MAC address. Since it hasn't given that address out to anybody else yet, it simply reassigns it back to the client.

At the 50% lease mark (2 days in my example), the computer will automatically try to renew that lease. If successfull, the computer will renew it again for 4 more days.

So, lets say that you turn off your computer for 5 days. Well, in the course of 5 days, the lease on your computer would expire. However, if the DHCP server doesn't give that address to another machine...then your machine will get that same address again for another 4 days.

So, the best way to get a new address is to get a different MAC address. And the best way to do that is to install a new network card into your computer.
In your particular case, it's the MAC address of the router which would need to change and you cannot simply just install another network card into the router. You might be able to spoof the MAC address to something else...but depending upon your ISP..this may or may not work.

My System SpecsSystem Spec
08 Jul 2010   #12

Windows 7 64bit Ultima

Thanks all for your help. The reason I want to try and change my IP was that we had an ventrilo server and had some trouble with this guy and ban him, but within moments returned and had a new IP. We ban him again and the same thing over and over. The only way to keep him out was to password the channel. So after reading this, he must of had some device that could switch his IP without trouble.

On an other note pparks1 that would explain why my iP change when I installed my new 610.

Thank you all again!
My System SpecsSystem Spec
06 Sep 2012   #13

windows 2003 ,32 bit

Quote   Quote: Originally Posted by puremacgyver View Post
I have been doing a lot of reading on how to change your IP and to me in windows 7 it is not possible.
How to change (Dynamic) IP address in Windows 7 or Vista?

Has any one been able to change there IP? I have tried everything. run/ipconfig /release, unpluging modem and router and no change.
You can't change the Ip address if you Have Static Ip while If you have Dynamic Ip You can change it with the Help of your ISP .After you Changed your Ip you can Check it in online sites like Ip-Details
My System SpecsSystem Spec

28 Nov 2012   #14

Changing A Dynamic Ip

Hello. I found a link by chance.I have a suggestion for your problem that is very useful to change IP address.
My System SpecsSystem Spec

 how to change a Dynamic ip address in windows 7?

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