04-22-2004, 09:28 PM
(This post was last modified: 04-22-2004, 09:47 PM by ZeroInterrupt.)
It's been a while since I had to use dial up but i'm going to assume that it functions much like any other dynamic internet connection. With dynamic assignments simply opening up a command prompt or a terminal and doing an ipconfig /release and then a ipconfig /renew will in essence give up your current IP address and request another dependant on the hosts dhcp servers' address lease expiration. When an address is requested via DHCP the server grabs the requestor's MAC ( it the crazy number that can be seen next to the "Physical Address" when you do an ipconfig /all - think of it as a fingerprint but for a network card/device - no 2 are alike) and assigns a address to that MAC in it's database, passes the request back to the requestor and time stamps the request.
So, if you can change the MAC on your computer the host DHCP server will give you another IP -or- if you leave the computer disconnected from the network until the expiration time has elapsed. Comcast used to be 8 days, which means that I would have to leave my router disconnected from the cable modem for 8 days and essentially not use my internet for that period of time before my address lease would expire, but they may have changed the lease time and I don't know what it is now.
With dial-up again i'm going to assume that it is probably set in hours meaning that once you disconnect the connection and do not reconnect for a set period of time (a few hours in this example) it returns the address to the available pool of addresses (most smaller isp only purchase one or two public class c address ranges - 254 in each - for their dial up/dsl/isdn pool) for someone else to use.
Now speaking from experience with comcast cable in the Chicago area the quickest way for me to change IP's and keep the connection alive is to adjust the MAC address. The easiest way is to either change the network card in your PC or if you are using a router of some sort there should be a setting to allow you to spoof a MAC that is connected to it (one of your PC's) or to use the MAC that is built into the router. Look in the router for an area that allows for a "User defined MAC address" or something similar. Go to a PC connected to that router do an ipconfig /all jot down the "physical address" and enter it where is asks.
I really don't think they banned a whole subnet, well maybe I should not say that (I've seen stranger things happen). What I think may have just banned the public IP that you where using and your dynamic (DHCP) lease has yet to expire. Try the ipconfig /release & ipconfig /renew (for win NT based machines) or winipcfg for the 95/98/me pc's.
Good luck and PM me if need help...
-Zero
So, if you can change the MAC on your computer the host DHCP server will give you another IP -or- if you leave the computer disconnected from the network until the expiration time has elapsed. Comcast used to be 8 days, which means that I would have to leave my router disconnected from the cable modem for 8 days and essentially not use my internet for that period of time before my address lease would expire, but they may have changed the lease time and I don't know what it is now.
With dial-up again i'm going to assume that it is probably set in hours meaning that once you disconnect the connection and do not reconnect for a set period of time (a few hours in this example) it returns the address to the available pool of addresses (most smaller isp only purchase one or two public class c address ranges - 254 in each - for their dial up/dsl/isdn pool) for someone else to use.
Now speaking from experience with comcast cable in the Chicago area the quickest way for me to change IP's and keep the connection alive is to adjust the MAC address. The easiest way is to either change the network card in your PC or if you are using a router of some sort there should be a setting to allow you to spoof a MAC that is connected to it (one of your PC's) or to use the MAC that is built into the router. Look in the router for an area that allows for a "User defined MAC address" or something similar. Go to a PC connected to that router do an ipconfig /all jot down the "physical address" and enter it where is asks.
I really don't think they banned a whole subnet, well maybe I should not say that (I've seen stranger things happen). What I think may have just banned the public IP that you where using and your dynamic (DHCP) lease has yet to expire. Try the ipconfig /release & ipconfig /renew (for win NT based machines) or winipcfg for the 95/98/me pc's.
Good luck and PM me if need help...
-Zero