IP address conflict

I keep getting a IP address conflict popup error. Linksys wireless 4 port
router with 2 computers on wireless and this one on cable.

Any idea on how to track this down.

Thanks

"Don Harvey" <moark5-(E-Mail Removed)> wrote in
newsw9ke.268$(E-Mail Removed):

> I keep getting a IP address conflict popup error. Linksys wireless 4
> port router with 2 computers on wireless and this one on cable.
>
> Any idea on how to track this down.
>

You do IPconfig /all on the machines at the Command Prompt and get the
MAC/Hardware address of the NIC(s) being used on your network.

You go to the router logs to see what IP(s) have been issued to what NIC
MAC(s).

If you have a MAC listed in the router logs that is not one of the NIC MAC
(s) for one of your machines, then someone could be using your wireless
network. That is a possibility.

The IP conflict means one of your machines cannot get an IP from the router
and another machine on the network is already using that IP.

The DHCP server on the router uses the NIC(s) MAC to assigning the same IP
to the NIC and most of the time that IP assignment stays permanent in a two
machine setup like you have for your network.

http://compnetworking.about.com/od/w...fisecurity.htm

You can also delete the NIC MAC(s) out of the MAC Table and get a fresh
start and see what happens too.

Duane

Many thanks Duane, this helps a lot. Will check it tonight when I get home.
This just started a few days ago and I did not have a clue on where to
begin.


"Duane Arnold" <(E-Mail Removed)> wrote in message
news:Xns965F3DED10FFnotmenotmecom@204.127.199.17.. .
: "Don Harvey" <moark5-(E-Mail Removed)> wrote in
: newsw9ke.268$(E-Mail Removed):
:
: > I keep getting a IP address conflict popup error. Linksys wireless 4
: > port router with 2 computers on wireless and this one on cable.
: >
: > Any idea on how to track this down.
: >
:
: You do IPconfig /all on the machines at the Command Prompt and get the
: MAC/Hardware address of the NIC(s) being used on your network.
:
: You go to the router logs to see what IP(s) have been issued to what NIC
: MAC(s).
:
: If you have a MAC listed in the router logs that is not one of the NIC MAC
: (s) for one of your machines, then someone could be using your wireless
: network. That is a possibility.
:
: The IP conflict means one of your machines cannot get an IP from the
router
: and another machine on the network is already using that IP.
:
: The DHCP server on the router uses the NIC(s) MAC to assigning the same IP
: to the NIC and most of the time that IP assignment stays permanent in a
two
: machine setup like you have for your network.
:
: http://compnetworking.about.com/od/w...fisecurity.htm
:
: You can also delete the NIC MAC(s) out of the MAC Table and get a fresh
: start and see what happens too.
:
: Duane
:

On Mon, 23 May 2005 00:32:21 GMT, in alt.internet.wireless , "Don
Harvey" <moark5-(E-Mail Removed)> wrote:

>I keep getting a IP address conflict popup error. Linksys wireless 4 port
>router with 2 computers on wireless and this one on cable.

Two of your computers have the same IP address. Type IPCONFIG into a
command prompt window on each of them, and change the IP for one of
the offending machines.

If none of your machines has a duplicate IP, then its possible you
have an intruder on your wireless network, who is cloning one of your
machine's MAC addresses so he can get an IP from your router. Next
time you see the problem, see what the router thinks is connected,
and consider more security.
--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>

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Thanks Mark and Duane

It has not occurred tonight but now I know how to proceed. You are right, I
did not set any security since I did not think it would be necessary here,
bad thinking, so will set the security.

"Mark McIntyre" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Mon, 23 May 2005 00:32:21 GMT, in alt.internet.wireless , "Don
> Harvey" <moark5-(E-Mail Removed)> wrote:
>
> >I keep getting a IP address conflict popup error. Linksys wireless 4
port
> >router with 2 computers on wireless and this one on cable.
>
> Two of your computers have the same IP address. Type IPCONFIG into a
> command prompt window on each of them, and change the IP for one of
> the offending machines.
>
> If none of your machines has a duplicate IP, then its possible you
> have an intruder on your wireless network, who is cloning one of your
> machine's MAC addresses so he can get an IP from your router. Next
> time you see the problem, see what the router thinks is connected,
> and consider more security.
> --
> Mark McIntyre
> CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
> CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>
>
> ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet
News==----
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Newsgroups
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