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Computer Security - how did my router get this ip address?

 
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Old 05-15-2004, 07:09 AM   #1
Default how did my router get this ip address?


I have an access point on my network that sees my NAT router
(according to its mac address) as having IP address 213.48.102.216.
When I visit a site that reveals my WAN IP address, this is not it.
Whois reveals 213.48.102.216 to be some site in the UK. I am in the
US. What's going on???


Serenity
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Old 05-15-2004, 05:24 PM   #2
Serenity
 
Posts: n/a
Default Re: how did my router get this ip address?
(Serenity) wrote in message news:<. com>...
> I have an access point on my network that sees my NAT router
> (according to its mac address) as having IP address 213.48.102.216.
> When I visit a site that reveals my WAN IP address, this is not it.
> Whois reveals 213.48.102.216 to be some site in the UK. I am in the
> US. What's going on???


Now the IP address is 217.83.81.14, which whois reveals as someplace in Germany.


Serenity
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Old 05-15-2004, 10:05 PM   #3
Serenity
 
Posts: n/a
Default Re: how did my router get this ip address?
(Serenity) wrote in message news:<. com>...
> (Serenity) wrote in message news:<. com>...
> > I have an access point on my network that sees my NAT router
> > (according to its mac address) as having IP address 213.48.102.216.
> > When I visit a site that reveals my WAN IP address, this is not it.
> > Whois reveals 213.48.102.216 to be some site in the UK. I am in the
> > US. What's going on???

>
> Now the IP address is 217.83.81.14, which whois reveals as someplace in Germany.


Now 66.50.193.142 in Puerto Rico


Serenity
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Old 05-15-2004, 11:07 PM   #4
Gordon Findlay
 
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Default Re: how did my router get this ip address?
On 15 May 2004 14:05:59 -0700, (Serenity) wrote:

> (Serenity) wrote in message news:<. com>...
>> (Serenity) wrote in message news:<. com>...
>> > I have an access point on my network that sees my NAT router
>> > (according to its mac address) as having IP address 213.48.102.216.
>> > When I visit a site that reveals my WAN IP address, this is not it.
>> > Whois reveals 213.48.102.216 to be some site in the UK. I am in the
>> > US. What's going on???

>>
>> Now the IP address is 217.83.81.14, which whois reveals as someplace in Germany.

>
>Now 66.50.193.142 in Puerto Rico


Are you connecting to an ISP that uses some exotic proxy cache
arrangement that has the effect of changing this?

The remote site can only see the IP number of packets that arrive at
its interface. If these packets come from a rotating pool of addresses
which actually belong to the caches rather than your endpoint, the
remote site may be confused.

This is particularly irritating if the remote site sells subscriptions
to IP numbers, as some sceintific joiurnals used to.



Gordon Findlay
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Old 05-16-2004, 02:49 AM   #5
Serenity
 
Posts: n/a
Default Re: how did my router get this ip address?
Gordon Findlay <> wrote in message news:<>. ..
> On 15 May 2004 14:05:59 -0700, (Serenity) wrote:
>
> > (Serenity) wrote in message news:<. com>...
> >> (Serenity) wrote in message news:<. com>...
> >> > I have an access point on my network that sees my NAT router
> >> > (according to its mac address) as having IP address 213.48.102.216.
> >> > When I visit a site that reveals my WAN IP address, this is not it.
> >> > Whois reveals 213.48.102.216 to be some site in the UK. I am in the
> >> > US. What's going on???
> >>
> >> Now the IP address is 217.83.81.14, which whois reveals as someplace in Germany.

> >
> >Now 66.50.193.142 in Puerto Rico

>
> Are you connecting to an ISP that uses some exotic proxy cache
> arrangement that has the effect of changing this?
>
> The remote site can only see the IP number of packets that arrive at
> its interface. If these packets come from a rotating pool of addresses
> which actually belong to the caches rather than your endpoint, the
> remote site may be confused.
>
> This is particularly irritating if the remote site sells subscriptions
> to IP numbers, as some sceintific joiurnals used to.


My WAN ip address is something like this:
http://www.whois.sc/24.238.251.99
That is the ip address the world sees for my router. My access point,
which sits inside my LAN, sees my laptop and the router as "attached
devices". According to the access point, my laptop's ip is
192.168.0.x, while my router's ip address has been all funky (as my
access point sees it anyway). Maybe this is normal, and the router's
ip address from the LAN side changes according to where I am surfing?
Maybe this isn't a security thing after all...


Serenity
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Old 05-16-2004, 08:54 AM   #6
Jim Watt
 
Posts: n/a
Default Re: how did my router get this ip address?
On 15 May 2004 18:49:40 -0700, (Serenity) wrote:

>Gordon Findlay <> wrote in message news:<>. ..
>> On 15 May 2004 14:05:59 -0700, (Serenity) wrote:
>>
>> > (Serenity) wrote in message news:<. com>...
>> >> (Serenity) wrote in message news:<. com>...
>> >> > I have an access point on my network that sees my NAT router
>> >> > (according to its mac address) as having IP address 213.48.102.216.
>> >> > When I visit a site that reveals my WAN IP address, this is not it.
>> >> > Whois reveals 213.48.102.216 to be some site in the UK. I am in the
>> >> > US. What's going on???
>> >>
>> >> Now the IP address is 217.83.81.14, which whois reveals as someplace in Germany.
>> >
>> >Now 66.50.193.142 in Puerto Rico

>>
>> Are you connecting to an ISP that uses some exotic proxy cache
>> arrangement that has the effect of changing this?
>>
>> The remote site can only see the IP number of packets that arrive at
>> its interface. If these packets come from a rotating pool of addresses
>> which actually belong to the caches rather than your endpoint, the
>> remote site may be confused.
>>
>> This is particularly irritating if the remote site sells subscriptions
>> to IP numbers, as some sceintific joiurnals used to.

>
>My WAN ip address is something like this:
>http://www.whois.sc/24.238.251.99
>That is the ip address the world sees for my router. My access point,
>which sits inside my LAN, sees my laptop and the router as "attached
>devices". According to the access point, my laptop's ip is
>192.168.0.x, while my router's ip address has been all funky (as my
>access point sees it anyway). Maybe this is normal, and the router's
>ip address from the LAN side changes according to where I am surfing?
>Maybe this isn't a security thing after all...


The WAN side IP is allocated to the router dynamically
by your service provider, usually from a pool of addresses
that are allocated to them.

Most of the time it does not matter what address they give
you.
--
Jim Watt
http://www.gibnet.com


Jim Watt
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