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Windows 7 DHCP

gamerguy2

gamerguy2

Member
Hello.

I have a couple questions that I could use some help with. If any of you could answer a couple questions for me.

I noticed my IP is static with Time Warner Cable. I have a Motorola Surfboard Modem that I own SB6141. The mac address and is registered with Time Warner. I did , however, try to change my IP address through CMD (IP config and IP release). The IP address remained the same. Can any you help point out a simple control for enabling the DHCP? I haven't found the time to call Time Warner (during normal business hours). I tried googling DHCP and tried a couple of the answers on how to enable it in Windows 7. The IP stayed the same.

The second question. I came across napclcfg.msc . Should I modify the settings or leave them all disabled (default as of now)? I am far from a superuser, but I am interested in in Windows settings and how to change them.
 
It is now enabled.

I ran netsh nap client set enforcement ID = 79617 ADMIN = "ENABLE as an administrator. It is enabled but whatismyip says my IP is the same as before. (I ran IPconfig release and renew and rebooted).

My job is asking me to survey them. They said my responses are private (lmaorofl) . I want to submit it, but the IP address from all emails is easy for them to match with a static IP to the survey.
 
If you turned on DHCP and yet you still got the same address, it likely that TWC has given you a static DHCP reservation for the MAC address of the modem. There is nothing you can do to get a new address from them unless you change the MAC address of the modem. Doing so may cause you to get no address and thus no internet. I am not sure how TWC works their network.

BTW you can't trust whatismyip if TWC is using a proxy server or NAT server for you to reach the internet.
 
I used to be able to change my IP address. Do you have any recommendations on how to check my IP adress other than WhatismyIP?

Why would Time Warner use a proxy? That means that even if I use a proxy everything would go through Time Warner's proxy first. Right? So there is no way to go around them and they can sell all my personal information to advertising companies? I wonder when and why this changed. My IPv4 is static at the IP address as well. Can I change the subnet mask to 2 to change this?
 
Do you have a router between your cable modem and your computer or are you plugged straight into the modem?

If you have a router between your computer and cable modem
then to get a new ip you would change the MAC address of the router.

Then usually need to shut down your cable modem for about 10 minutes.
Helps to reboot computer and router too.

Then after @10 minutes restart cable modem and it should assign a new IP due to the new MAC address on the router.
-well this is the way comcast works not sure if same with TW C


PS
if your computer is plugged straight into the cable modem without a router in-between(not recommended)
you would change the MAC address of computer:
Network and Sharing Center > Change adapter settings > right click on adapter name, then Properties > Configure > Advanced tab > Network adress
Check Value and enter your new madeup MAC address
Shutdown everything wait @10 minutes and restart
 
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TWC controls the IP you get. All of this may result in no change. The DHCP lease time could be 20 minutes or 30 days. It depends on TWC. There is little you can do about it.
 
Is the modem a stand-alone device or is it a Windows 7 "network card"? If it doesn't show up as a network card, anything you do to Windows has nothing to do with the modem anyway.

And yes, your computer can have DHCP enabled and the DHCP server at the other end can be configured to always give you the same address based on some defining characteristic (usually MAC address, but it could be literally any other piece of information they can identify you by.)
 
Cable line to modem to ethernet to computer. Funny thing is my employer sent me another request to complete a private anonymous survey.
 
"The DHCP lease time could be 20 minutes or 30 days. It depends on TWC. "

So the IP can change after the lease time? if that is true it makes a lot of sense that I changed my IP before but could not when I tried recently.
 
gamerguy2 said:
"The DHCP lease time could be 20 minutes or 30 days. It depends on TWC. "

So the IP can change after the lease time? if that is true it makes a lot of sense that I changed my IP before but could not when I tried recently.
Click to expand...
You're missing the point. They decide the IP you'll get. You may get the same IP again. You may not. You can't just assign yourself a IP from their IP pool. If you want static IP, ask them and they will usually do it for a monthly fee.
 
If it's ethernet from the modem to your PC, there's nothing you can do in Windows' configuration of your network adapter that will alter your external IP address.

You might be able to go into the configuration page of the modem by plugging the modem's internal IP address (like 10.0.0.1) into your browser and playing with settings there, but it's extremely likely the ISP will simply reject anything except the IP they have assigned to you - as has already been said here by everyone else.
 
@OP if you are so concerned with them selling your info to advertisers, then get off the internet all together. Whether you have it or not(different IP), they can still give your info to advertisers. They have an IP address table that is tied to each customer account. So, if Bob Johnsons account number is associated with 155.24.22.110, and he changes it to 193.221.1.4 they can still tied to key primary key index which is account number. Dude honestly you can't hide from TWC if you are on their network. But the only way is to block advertisements with HostsMan. You will need to disable DNS client cache though. It will make your internet pages pop up slower since the connections aren't cached.

But you will get almost no advertisements in youtube and slickdeals. Except in their main JSP or AJAX GET calls to the http_resource_main connection. You notice only inline ads on their own servers get through. If it's from an external source like AWS.staticimg.xx.blah-efjerja390.amazon. Or akamai. Or any advertisers in the hostman filter file, it will get blocked for sure. It basically rewrites the HOSTS file to send traffic to loopback or localhost. So it just gets dropped.
 
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