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Changing My IP Address



 
 
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  #1  
Old April 18th 18, 12:09 PM posted to microsoft.public.windowsxp.general
No_Name
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Posts: 326
Default Changing My IP Address

Hi,
If a web site records the IP addresses of every visitor in order to
track "who" is a repeat visitor, would turning off (power off) my DSL
modem/router for a few minutes, then back on, change my IP address?

Note: There are very few "dial-ups" (their IP address always changes).

What do you think?

Thank You in advance, John

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  #3  
Old April 18th 18, 03:47 PM posted to microsoft.public.windowsxp.general
VanguardLH[_2_]
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Posts: 10,881
Default Changing My IP Address

jaugustine wrote:

If a web site records the IP addresses of every visitor in order to
track "who" is a repeat visitor, would turning off (power off) my
DSL modem/router for a few minutes, then back on, change my IP
address?


Likely not. ISPs get a pool of addresses. When you unbind and rebind,
the time between if often too short. the ISP's DHCP server will likely
reassign to you the same IP address you had before.

When you bind (to get an IP address), it has an expiration. Some ISPs
expire the bindings after 1, some up to 3 days. However, after a
binding, it remains active even after its expiration until released
(unbind). Powering off the modem will unbind. When powering back up,
the modem will request a new IP address but the ISP's DHCP server will
likely reassign the prior IP address to you unless it got assigned to
someone else. That's why customers will keep the same IP address for a
long time. It is dynamically assigned so it could change after an
unbind to a new bind.

Sometimes maintenance at the ISP results in a non-validated binding.
You did a bind, got an IP address, and your equipment remains powered
and keeps the bind even after expiration. However, the ISP does
something that removes that binding from their tables. To them, the
binding is no longer defined. Your end still looks good but suddenly
you can't get anywhere. You have to unbind and bind again. You might
get the same IP address but have recreated the binding define at your
ISP. The customer has to rebind on a non-existing definition at the
ISP. Power cycling the modem will do a new bind. For some modems, the
user can connect to its internal web server and perform a release and
renew (on the binding). This is why one of the first responses from the
tech is to power cycle the modem to force a new bind.

Most customers get a dynamically assigned IP address from one of those
in their ISP's IP pool. It could change. You bind, the assignment
expires but remains valid during the bind, and after an unbind then the
IP address becomes eligible for reassignment; however, with always-on
cable or DSL service, it could be many days before your old IP address
gets assigned to someone else which means you would get a new one.
Doing an unbind (power off or releasing the bind) followed by a bind
will probably get you the same IP address. Since it is dynamic, it
could change. For customers that always want the same IP address, they
get their account configured to assign a static IP address. Sometimes a
static IP address costs more, sometimes not. Business accounts often
get a static IP address. Some ISPs with large IP pools dole out static
IP addresses to their non-business customers.

Note: There are very few "dial-ups" (their IP address always changes).


Dial-up usually works differently. After an unbind, the IP address
immediately goes back into the pool and will likely get assigned to
someone else. Some will try to hold the association for awhile so you
get the same IP address on a subsequent new bind but the hang time is
pretty short. Depends on the ratio of dial-up customers to the number
of IP address in the ISP's dial-up IP pool.

The ISP's IP address does not always change. For dial-up and after an
unbind (and a subsequent new bind), yes, that IP address (to which *you*
are assigned from their IP pool) usually changes.

If you're trying to circumvent an IP lockout at some site where they
decided you are no longer allowed in, trying to change your ISP address
assigned by your ISP when using cable/DSL connections probably won't
work. You'll get the same IP address you had before. Those trying to
bypass a "bad visitor" IP block would have to wait for many days for
their unbinded IP address to become eligible for reassignment to someone
else so they would get a new one. However, you could end up getting
assigned a new IP address that someone had before you that got IP
blocked from a site. You inherit their site blocks. That's more likely
to happen with dial-up service where each time you break a connection
and establish a new one you get assigned a new IP address but someone
else might've abused it so now you get blocked.

IP blocking is a unreliable method of getting rid of abusive or unwanted
visitors. The abuser could manage to get a new IP address. A user
could get assigned a new IP address that someone abused before them. If
the site wants to block visitors (which usually means block their
participation, not them from lurking), they should be using logins to
accounts. Web browser fingerprinting is another method but it is also
unreliable, except for a few methods with are excellent. For example,
if you do not purge site preferences in Firefox or do not use private
mode for each new web session, there is a defect with HSTS (aka HSTS
supercookies) that lets a site assign a unique ID to you. You can be
easily identified on your next visit. The site to test this
(http://www.radicalresearch.co.uk/lab/hstssupercookies) is gone. Could
be the web browser authors crumbled the use of those super cookies. I
know Seamonkey did without fanfare.

So just WHY do you feel the need to change your IP address at-will?
When I see someone asking about this, usually it is because they were
abusive and got IP locked out from a site where they want to continue
abusing. Changing your IP address (to another assigned from your ISP's
IP pool) won't get you around regional restrictions to sites. Because
you want to watch something at a site that blocks visitors from outside
their allowed regions won't change because you changed your IP address.
  #7  
Old April 23rd 18, 01:49 PM posted to microsoft.public.windowsxp.general
No_Name
external usenet poster
 
Posts: 326
Default Changing My IP Address

SNIP

To check, try a site such as "whatismyip.com". Turn off your
gear, do a few tests, see what you think.

Paul


Hi Paul,

I went to that site and wrote down the public IP address.
After I closed my browser, I turned off (power off) my
DSL modem/router for about 4 to 5 minutes.

After power back on and modem was ready, I went to
that site again. The public IP address was NOT the same.
The first two parts (separated by a period) was the same,
but the third and fourth part was different.

Thanks again, John

 




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