Re: DHCP problems

On Fri, 11 Jan 2008 13:56:53 -0500, Thynker
<Thynker.331ci1@no-mx.wirelessforums.org> wrote in
<Thynker.331ci1@no-mx.wirelessforums.org>:

>I have a DSL router with DHCP enabled, the gateway is 192.168.2.1 the
>wired part is working fine.
>But I have two laptop connecting wireless, both have identical
>settings, one gets its IP with no problem, the other gets a gateway
>192.168.123.254 and an IP 192.168.123.150. the signal is excellent in
>both cases.

Sounds like it may be connecting to a different wireless network (e.g.,
a neighbor). Make sure you have a *unique* SSID set in your wireless
router; e.g., something like your street address, not just "linksys".

>Did ipconfig /release and renew on the faulty one, put in the gateway
>192.168.2.1 but I still get an IP 192.168.123.150.
>I'm using WPA-PSK with TKIP
>
>Of course if I give it a static IP all is fine, but this user travels a
>lot in different hotels.

Check the computer settings for the list of available automatic networks
(which might trigger connection to a different network), as well as
non-Windows connection manager software (which can override settings).

--
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John Navas <spamfilter1@navasgroup.com> wrote:
> Sounds like it may be connecting to a different wireless network (e.g.,
> a neighbor). Make sure you have a *unique* SSID set in your wireless
> router; e.g., something like your street address, not just "linksys".

You could turn off "your" router, and see if the system magically connects
anyway ;-)

Do you have a monitoring tool that will expose that you have actually
connected to a WPA connection, and not your neighbor's open connection?
192.168.123.x sounds like a non-default setup in someone else's router.
Mine will expose the connection type, a little padlock, and even show the
MAC address of the WAP.

If you don't have such a tool, you could start-run-cmd and run arp -a,
which should expose the ip address and MAC of the router.



My new laptop with built in WiFi can connect to access points that the old
laptop with a PCMCIA card didn't even "find".


I agree about the non-default SSID. Presumably, you will configure to
auto-connect at home. You probably shouldn't auto-connect to random access
points that are at the default "linksys" out in the wild world.

--
Clarence A Dold - Hidden Valley Lake, CA, USA GPS: 38.8,-122.5

On Sat, 12 Jan 2008 18:31:50 +0000 (UTC), dold@70.usenet.us.com wrote in
<fmb12m$6hs$3@blue.rahul.net>:

>John Navas <spamfilter1@navasgroup.com> wrote:
>> Sounds like it may be connecting to a different wireless network (e.g.,
>> a neighbor). Make sure you have a *unique* SSID set in your wireless
>> router; e.g., something like your street address, not just "linksys".
>
>You could turn off "your" router, and see if the system magically connects
>anyway ;-)

True, but you should use a unique SSID in any event.

>Do you have a monitoring tool that will expose that you have actually
>connected to a WPA connection, and not your neighbor's open connection?
>192.168.123.x sounds like a non-default setup in someone else's router.
>Mine will expose the connection type, a little padlock, and even show the
>MAC address of the WAP.

Windows will tell you if the connection is secure or not -- View
Available Networks.

>My new laptop with built in WiFi can connect to access points that the old
>laptop with a PCMCIA card didn't even "find".

No surprise there -- the big antennas in better laptops are much better
than the tiny antennas in PC Cards.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>