Force IP change with Comcast cable

[DavieGravy]

I was wondering if there's anyway to force an IP address change with comcast cable without replacing the network card? Thanks in advance for any help.

[Abhoth]

Not sure if a release / renew would do it ... but think a power down and disconnect of the cable on your modem for a few minutes... then reattached would do it for you.
Then again ... might not work! ;-) Give it a try and let us know....

[DavieGravy]

Thanks for the reply. A comcast rep instructed me to unplug the cable from the modem for 20 seconds, then reconnect it. However, this didn't work. I also tried leaving the cable disconnected over night, but still the same IP. Then today, I tried disconnecting the power from the modem and leaving it like that all day. This didn't work either. Have tried ipconfig /release , ipconfig /renew. Looks like I'll have to wait for it to change, which it does every so often.

The reason I wanted to do this was because I sent an email I shouldn't have while I was under the influence of about 9 beers. :-) I apologized to the person but I'm afraid of reprocusions. Do you think the IP could be traced back to my account? I already deleted the email address I used from my comcast account. Any future emails sent to that address will just bounce back.

[Tuttle]

Getting info based on an IP address is actually pretty hard, assuming you're doing all the normal stuff like running a firewall of some sort. They'd be able to find out it's a Comcast IP address very easily, but getting details out of Comcast would require a court order.

[DavieGravy]

Thanks tuttle. I appreciate the resposne as it puts my mind at ease. I suppose deleting the email address from my account was a smart move.

I guess the moral of the story here is don't drink and email.

[brianskurka]

Could you change the MAC address of your router? It works down here in AZ.

[DavieGravy]

brianskurka, I don't have a router as I only have one computer in my home (that's connected to the internet anyway). Do you mean change the mac address of the cable modem? If so, unfortunately not as it doesn't have web configuration built into it.

[brianskurka]

No I meant change the MAC address of the routers WAN port, since you don't have a router that won't work. You could always swap and/or add a different network card.

[DavieGravy]

I guess swapping the nic is one option, however this is a work lap top so I'm not too inclined to mess with it. Funnily enough I can actually leave my modem disconnected and leach of my neighbor's wireless connection. If my modem's disconnected, would comcast know which cable modem on wich account that IP address was last assigned to?

[DavieGravy]

OK, connecting the modem via USB was the solution to changing my ip. My modem does actually have web configuration but I didn't see any options to change anything.

[Tuttle]

If my modem's disconnected, would comcast know which cable modem on wich account that IP address was last assigned to?

All that sort of stuff is generally logged. How long those logs are kept for varies -- generally an ISP would want to keep them for the shortest possible time which is still adequate for troubleshooting and meets any legislative requirements. The less they keep, the less they have to deal with when subpoenaed.

[Informative]

I was wondering if there's anyway to force an IP address change with comcast cable without replacing the network card? Thanks in advance for any help.

Not sure if this will help you but others may want to know.

If you have a Router then do a MAC clone off another PC or make one up and reset and this will change your IP at comcast. USB connection also works only because onboard or network card keeps the same MAC. USB is another MAC.

If you only have one network card then shift your MAC id.

The best way is to have a cable router " you should use a router with your cable modem " and then its easy to clone and/or make your own to get the IP to change.

The Cable modem is a dumb box that allows the digital to and from but comcast but needs and reads the MAC on what ever you have connected to it.

Remember the cable modem is a dumb box and used to read write digital. What ever is connected to it matters.

[Dude111]

Welcome to the site!

I dont think cloning the mac is a good idea,what happens if they do a check for dupe macs?? (Ya gotta remember stuff like that!!)

[Train]

Hack a comcast modem and become a ex customer. Even if you own the modem.

[Informative]

Never said anything about hacking or cracking a cable modem.

The cable modem ID number is for Digital service and has nothing to do with your computers MAC ID that I'm talking about. The computer you connect to the cable modem is the one that gets the IP not the modem because that is digital service id.

Ok this the simple way - Lets say you have a 1st computer connected to the cable modem. If you unplug the power of the cable modem and then change the 1st computer out with a 2nd computer and plug cable modem back in - Bang you got a new IP from comcast. Lets say you unplug the 2nd computer and then you power down the cable modem and connect the 1st computer - bang you old ip again.

Change the MAC number of the Computer will change the ip from comcast.

The MAC address is the id of who sent what and who gets what on a network. Comcast can do nothing about what MAC I use - but is most the problems on large cloned computers.

Your Router acts like a computer and in your Router's menu you will see a clone ip button. This button will clone the MAC ID from the computer you connected to the Router's menu on and will copy the computers MAC and the Service has no clue you got a router. This is not a crime unless you are told by your service " You can't do that"

If your cable service goes by the Computers MAC then you have no control over the IP.

no drama please