What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 11.03.2007 18:16:59 von Carol Frilegh

I just want to know the last IP address I used, whether or not I'm
currently on the Internet, on Windows XP. I'm sure there is a log of this
somewhere. What's the best way to get my last assigned PPPoE IP address
when I'm behind a router and I'm not currently connected to the Internet?

While connected to the Internet, I know I can go to http://whatsmyipaddress
to find the IP address from behind the router - and I know that IP address
will show up in this nntp header - but I am curious if there is a way to
determine the IP address shown to the Internet without actually going out
to the Internet.

Why?

Because I often disconnect from the Internet and I want to see what my LAST
IP address was. If I reconnect to the Internet, I'll get the new IP
address, not the old IP address.

Also, if I type "winipconfig /all", I get the IP address assigned BY the
router to the computer (not TO the router by the PPPoE ISP).

I'll eventually figure this out but maybe you can give me a head start?

What is a convenient way to find the last IP address assigned to your PPPoE
router by the ISP from the computer without being on the Internet itself?

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 11.03.2007 18:56:28 von Herb Martin

"Carol Frilegh" wrote in message
news:h6h7jyiz7nra.16wzxj6xrg3be$.dlg@40tude.net...
>I just want to know the last IP address I used, whether or not I'm
> currently on the Internet, on Windows XP. I'm sure there is a log of this
> somewhere. What's the best way to get my last assigned PPPoE IP address
> when I'm behind a router and I'm not currently connected to the Internet?

If you mean the address of your actual machine as a DHCP client:
It is in the registry if it just disconnecte or (probably) if it is expired.

But from below this isn't even what you mean.

> While connected to the Internet, I know I can go to
> http://whatsmyipaddress
> to find the IP address from behind the router - and I know that IP address
> will show up in this nntp header - but I am curious if there is a way to
> determine the IP address shown to the Internet without actually going out
> to the Internet.

It's in the Registry -- and you can you can always type "IPConfig /all" but
if
you

If you mean the address of the external side of a NAT/Proxy which is what
"whatsmyaddress.com" shows.

The NAT/Proxy has NO expression on the internal client and no meaning
there when the client isn't using that NAT/Proxy.

BTW: That http://www.whatsmyipaddress.com is invalid and the .net version
is marked as DANGEROUS by Google.

http://www.whatsmyipaddress.co.uk/ works however.

> Why?
>
> Because I often disconnect from the Internet and I want to see what my
> LAST
> IP address was. If I reconnect to the Internet, I'll get the new IP
> address, not the old IP address.

You don't really "get" an IP address in this sense but are rather access the
Internet THROUGH a NAT (network address translator) which only has
meaning WHILE you are doing this.

> Also, if I type "winipconfig /all", I get the IP address assigned BY the
> router to the computer (not TO the router by the PPPoE ISP).

You get the IP address of the actual computer you are using, whether it
was assigned by DHCP or manually.

> I'll eventually figure this out but maybe you can give me a head start?

Don't expect to find it since the computer you are using doesn't KNOW
what the NAT was using.

You could however just build a batch file that downloaded something
from http://www.whatsmyipaddress.co.uk/ or some such and then run
it while you are connected so you could "look later".

> What is a convenient way to find the last IP address assigned to your
> PPPoE
> router by the ISP from the computer without being on the Internet itself?

No, and your question is making a false ASSUMPTION: That address was
NEVER "ASSIGNED" to your computer.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 11.03.2007 23:29:57 von Wolfgang Kueter

Carol Frilegh wrote:

> What is a convenient way to find the last IP address assigned to your
> PPPoE router by the ISP from the computer without being on the Internet
> itself?

YOu can't find out unless you have access to the radius log files of your
ISP.

Wolfgang

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 03:07:18 von Stuart Miller

"Carol Frilegh" wrote in message
news:h6h7jyiz7nra.16wzxj6xrg3be$.dlg@40tude.net...
>I just want to know the last IP address I used, whether or not I'm
> currently on the Internet, on Windows XP. I'm sure there is a log of this
> somewhere. What's the best way to get my last assigned PPPoE IP address
> when I'm behind a router and I'm not currently connected to the Internet?

Just connect to the router and ask it.

For the one I use, go to your gateway ip, which is usually 192.168.0.1, the
internal address of the router
log in, look around, somewhere under status it will show all that and a lot
more.

Gnerally, the router address is static for a period of days or months. Mine
changes about 3 times a year.

>
> While connected to the Internet, I know I can go to
> http://whatsmyipaddress
> to find the IP address from behind the router - and I know that IP address
> will show up in this nntp header - but I am curious if there is a way to
> determine the IP address shown to the Internet without actually going out
> to the Internet.
>
> Why?
>
> Because I often disconnect from the Internet and I want to see what my
> LAST
> IP address was. If I reconnect to the Internet, I'll get the new IP
> address, not the old IP address.
>
Not necessarily.
It is a bit different for each dsl or cable provider, but theoretically,
each time you disconnect or power down the router/modem you may get a new
external ip address. But in practice, often it changes when you change your
mac address, or on a cycle. There is a lot of computer overhead matching new
ip addresses to customer acount numbers, so they don't do it that often.
I have had this ip address (for the router) for over 6 months, through power
failures, and cable service being down.

> Also, if I type "winipconfig /all", I get the IP address assigned BY the
> router to the computer (not TO the router by the PPPoE ISP).
>
> I'll eventually figure this out but maybe you can give me a head start?
>
> What is a convenient way to find the last IP address assigned to your
> PPPoE
> router by the ISP from the computer without being on the Internet itself?
>
> Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 04:08:56 von Administrator

Read inline please.
In news:h6h7jyiz7nra.16wzxj6xrg3be$.dlg@40tude.net,
Carol Frilegh typed:
> I just want to know the last IP address I used, whether or not I'm
> currently on the Internet, on Windows XP. I'm sure there is a log of
> this somewhere. What's the best way to get my last assigned PPPoE IP
> address when I'm behind a router and I'm not currently connected to
> the Internet?
>
> While connected to the Internet, I know I can go to
> http://whatsmyipaddress to find the IP address from behind the router
> - and I know that IP address will show up in this nntp header - but I
> am curious if there is a way to determine the IP address shown to the
> Internet without actually going out to the Internet.
>
> Why?
>
> Because I often disconnect from the Internet and I want to see what
> my LAST IP address was. If I reconnect to the Internet, I'll get the
> new IP address, not the old IP address.
>
> Also, if I type "winipconfig /all", I get the IP address assigned BY
> the router to the computer (not TO the router by the PPPoE ISP).
>
> I'll eventually figure this out but maybe you can give me a head
> start?
>
> What is a convenient way to find the last IP address assigned to your
> PPPoE router by the ISP from the computer without being on the
> Internet itself?

Getting your current IP address is one thing, if you disconnect, finding
what your IP address was is a totally different thing.
From the sound of your description, your router connects the PPPoE
connection, and you router would have to log this information, or you would
have to contact your ISP. By law, in the US, they have to log this
information, but in all likelihood unless you are a law enforcement agency
with a court order, they do not have to provide it to you. If they did, and
I had Dynamic IP addresses, I believe I would find another ISP. I wouldn't
want my ISP providing this type of information to anyone, even if they say
they are me. If you have a dynamic IP you should expect a reasonable amount
of privacy.
That said, I own my IP addresses, so this doesn't apply to me because doing
a whois lookup on my IP addresses returns my name as the owner of the IP
address block.

--
Best regards,
Kevin D. Goodknecht Sr. [MVP]
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Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 04:08:56 von Administrator

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 04:08:56 von Administrator

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 07:24:07 von Carol Frilegh

On Sun, 11 Mar 2007 12:56:28 -0500, Herb Martin wrote:
> BTW: That http://www.whatsmyipaddress.com is invalid
> and the .net version is marked as DANGEROUS by Google.
> http://www.whatsmyipaddress.co.uk/ works however.

Hello Herb,

That was an inadvertant typo on my part as I was missing an "i".
I had meant http://www.whatismyipaddress.com

BTW I like your suggested address because it gives me my hostname - browser
versions - operating system - latitude & longitude - net speed - type of
ISP - etc. but I like the MAP on the one I suggested which pretty much
exactly pinpoints my location for the nuclear missile should I say
something the Russian Mafia might not like!

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 07:30:11 von Carol Frilegh

On Sun, 11 Mar 2007 23:29:57 +0100, Wolfgang Kueter wrote:
>> What is a convenient way to find the last IP address assigned to your
>> PPPoE router by the ISP from the computer without being on the Internet
>> itself?
> YOu can't find out unless you have access to the radius log files of your
> ISP.

Hello Wolfgang,

I'm sure there is an easy way without the ISP.

Historical IP address information is logged in at least three places of
which two are in Windows XP and one is in the router itself that I am
checking at the moment based on the suggestions in this newsgroup.

Of course the fourth place the historical IP address is logged is as you
said at the ISP but as you said it will not be feasible to obtain the IP
address from them.

The trick will be to find the historical IP address used to connect via
tcpip to the Internet from within Windows XP itself.

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 07:46:15 von Carol Frilegh

On Mon, 12 Mar 2007 02:07:18 GMT, Stuart Miller wrote:
>>I just want to know the last IP address I used, whether or not I'm
>> currently on the Internet, on Windows XP.
> Just connect to the router and ask it.
> theoretically, each time you disconnect or power down the router/modem
> you may get a new external ip address.

Hello Stuart Miller,

My PPPoE IP provider gives me a one day lease which in practice is hourly
because when I power down the modem for anywhere between ten minutes and an
hour I get a new IP address so my IP addresses are more dynamic than yours.

Following your advice I connected to the Linksys WRT54G router by going to
http://198.162.1.1 and logging in with a blank username and a password of
"admin" which got me into the router setup pages.

Clicking on the Linksys WRT54G "Status" bar & clicking on the "Router" tab
tells me the IP address currently assigned to the router by the ISP.

But what I want is the historical log of the previous set of IP addresses?

Where do we access the log of historical IP addresses assigned to the
router by the ISP?

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 07:56:30 von Carol Frilegh

On Sun, 11 Mar 2007 22:08:56 -0500, Kevin D. Goodknecht Sr. [MVP] wrote:
>> I just want to know the last IP address I used, whether or not I'm
>> currently on the Internet, on Windows XP.

> From the sound of your description, your router connects the PPPoE
> connection, and you router would have to log this information

Hello Kevin D. Goodknecht Sr.,

Following most suggestions which centered around the router log files I
just turned on the logging of incoming and outgoing information on my
Linksys WRT54G router by logging into http://192.168.1.1 as a blank user
with a password of "admin" and then going to the "Administration" "Log"
"Enable" section.

I'm pretty sure there are three ways to find the historical IP address
information based on all the advice from this newsgroup
1. Find the historical IP address in the Windows XP event logs
2. Find the historical IP address in the Linksys Router event logs
3. Save the daily IP address from either WinXP or the router with a script

I'm exploring all three methods at the moment and one will certainly work
so I do appreciate all the help you can give and continue to give as I
don't see this question asked anywhere else on the Internet.

Carol

BTW, is there any way to change the user name from a blank name to a name
like "Carol" on this router? I can only see where to change the password at

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 08:10:03 von Carol Frilegh

>>> I just want to know the last IP address I used, whether or not I'm
>>> currently on the Internet, on Windows XP.
> I'm pretty sure there are three ways to find the historical IP address
> information based on all the advice from this newsgroup
> 1. Find the historical IP address in the Windows XP event logs
> 2. Find the historical IP address in the Linksys Router event logs
> 3. Save the daily IP address from either WinXP or the router with a script

I know we'll solve this problem which to my knowledge has never been asked
before on the Internet as far as I can google.

Unfortunately the router expert's suggestion of querying the Router log
files doesn't seem to work for the Linksys WRT54G Router because when I
turned on the logs using "Administration" "Log" "Enable" all I got were two
log files of incoming and outgoing connections but nothing about the
historical IP address assigned to the Router by the PPPoE provider.

Of course we can query the router ahead of time if we knew how because the
router always knows the current ip address and we can save that current
PPPoE assigned IP address into a log file somehow onto Windows XP.

Do you know WinXP & Routers well enough to query the Linksys WRT54G Router
http://192.168.1.1 programatically to login in with a blank login name and
a password of "admin" and then obtain the IP address stored in the "Status"
"Router" chart?

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 08:23:42 von Carol Frilegh

I know together we will solve this never before asked windows NAT question
especially because it seems the Windows System Event Logs store the
historical TCPIP IP address used to connect to the Internet somehow long
after the connection to the Internet was relinquished.

If I only knew how to obtain this historical IP address information from
the Windows Event Viewer programatically.

Manually I can see the IP address today by rightclicking on "My Computer"
"Manage" "Event Viewer" "System" and sorting by "Source" and looking for
"TCPIP" sources we find the "Computer Management" warning

Warning. Your computer has automatically configured the IP address for the
Network Card with network address 000FD451464B. The IP address being used
is 69.110.6.202.

The only problem is I see that warning with the IP address only
sporadically and I recently patched my TCPIP to allow more than 10
simultaneous connections so I think that warning came when I patched my
WinXP TCPIP.

I don't know the Windows Event Viewer very well so I ask are there WinXP
experts out there who know under what circumstances we can force the
Windows Event Viewer to faithfully record the current IP address assigned
to the Router for the PPPoE connection?

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 08:45:30 von Carol Frilegh

On Mon, 12 Mar 2007 00:23:42 -0700, Carol Frilegh wrote:
> I know together we will solve this never before asked windows NAT question

Together we will solve this problem as it seems like there are two distinct
methods to log the current IP address and then look at that log anytime we
want to.

One method seems to be to find on the Internet a script which will go to
teh http://checkip.dyndns.org/ web page and save the one line result of
your current IP address.

The other method seems to be to find a script on the Internet which will
run the Windows XP "ping -r -1" command as shown on the Router web page
http://compnetworking.about.com/od/workingwithipaddresses/f/ getrouteripaddr.htm

However when I tried the suggested "ping -r 1 www.yahoo.com" command on
Windows XP I didn't get the same results as suggested.

Here is what I got
======================
C:\Documents and Settings\carol>ping -r 1 www.yahoo.com
Pinging www.yahoo-ht2.akadns.net [69.147.114.210] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 69.147.114.210:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
C:\Documents and Settings\carol>
======================

So we're very close but not yet do we have a Windows XP command which we
can script to tell us the current IP address of the PPPoE connection
assigned to the NAT Router.

Do you experts know what PING command will work on Windows XP that will
report the current IP address assigned to the Linksys WRT54G Router by the
PPPoE provider?

Carol

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 12:51:03 von Herb Martin

"Carol Frilegh" wrote in message
news:1lswj9rwafrol$.1clb9mj0z78j4.dlg@40tude.net...
> On Sun, 11 Mar 2007 12:56:28 -0500, Herb Martin wrote:
>> BTW: That http://www.whatsmyipaddress.com is invalid
>> and the .net version is marked as DANGEROUS by Google.
>> http://www.whatsmyipaddress.co.uk/ works however.
>
> Hello Herb,
>
> That was an inadvertant typo on my part as I was missing an "i".
> I had meant http://www.whatismyipaddress.com

Darn, I tried to figure out what was misspelled in that name but missed
it -- well, since you like the new I gave that worked out ok.

> BTW I like your suggested address because it gives me my hostname -
> browser
> versions - operating system - latitude & longitude - net speed - type of
> ISP - etc. but I like the MAP on the one I suggested which pretty much
> exactly pinpoints my location for the nuclear missile should I say
> something the Russian Mafia might not like!

Ok.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 12:52:20 von Herb Martin

"Carol Frilegh" wrote in message
news:jgkziasm69dw$.1w8zaqrjp9y7o.dlg@40tude.net...
> On Sun, 11 Mar 2007 23:29:57 +0100, Wolfgang Kueter wrote:
>>> What is a convenient way to find the last IP address assigned to your
>>> PPPoE router by the ISP from the computer without being on the Internet
>>> itself?
>> YOu can't find out unless you have access to the radius log files of your
>> ISP.
>
> Hello Wolfgang,
>
> I'm sure there is an easy way without the ISP.
>
> Historical IP address information is logged in at least three places of
> which two are in Windows XP and one is in the router itself that I am
> checking at the moment based on the suggestions in this newsgroup.

No, because the local machine NEVER sees the NAT server external
address.

> Of course the fourth place the historical IP address is logged is as you
> said at the ISP but as you said it will not be feasible to obtain the IP
> address from them.
>
> The trick will be to find the historical IP address used to connect via
> tcpip to the Internet from within Windows XP itself.

No because your XP client never saw or even could logged that.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)

Re: What"s the LAST IP address I used when I was connected to the Internet (PPPoE, NAT)

am 12.03.2007 12:54:45 von Herb Martin

"Carol Frilegh" wrote in message
news:kr5eofh79a19$.9qy5ei7vna3j$.dlg@40tude.net...
>>>> I just want to know the last IP address I used, whether or not I'm
>>>> currently on the Internet, on Windows XP.
>> I'm pretty sure there are three ways to find the historical IP address
>> information based on all the advice from this newsgroup
>> 1. Find the historical IP address in the Windows XP event logs
>> 2. Find the historical IP address in the Linksys Router event logs
>> 3. Save the daily IP address from either WinXP or the router with a
>> script
>
> I know we'll solve this problem which to my knowledge has never been asked
> before on the Internet as far as I can google.

No there is no direct way to get this info -- besides the convoluted scheme
I gave you in my first response.

> Of course we can query the router ahead of time if we knew how because the
> router always knows the current ip address and we can save that current
> PPPoE assigned IP address into a log file somehow onto Windows XP.
>
> Do you know WinXP & Routers well enough to query the Linksys WRT54G Router
> http://192.168.1.1 programatically to login in with a blank login name and
> a password of "admin" and then obtain the IP address stored in the
> "Status"
> "Router" chart?

Simpler to just WGet (get a web page) from that site you like with all the
other
info on it.

Schedule this to run (if you don't want to do it manually) periodically and
you
will always have the previous one -- up to some reasonable time period.

--
Herb Martin, MCSE, MVP
http://www.LearnQuick.Com
(phone on web site)