These are tough to troubleshoot. Let me start by saying that for no really
good reason, I think you're going to end up replacing the wireless card in
the laptop. I've only had a few instances where wireless failed on one PC
and not others, but with the exception of one obvious case where a
certificate was expired, they've been NIC- related. I have had at least two
Dell laptops that would connect perfectly to any insecure network, but would
not connect to the 802.1x network at all (not sure if they were Dell-branded
or Intel NICs). One thing I should mention is that this problem is at all
intermittent - for example you get connected once in 100 attempts - it's
almost certainly hardware.
You've got several machines in the same configuration, and they all connect
properly except for the one, right? If so, that obviously limits
troubleshooting to that one machine, and not the WAPs, server, IAS, etc.
I would look at the installed certificates, making sure the laptop in
question has all of the same certs, in the same stores, as one that's
connecting normally. I usually just look in IE Tools -> Internet Options ->
Content -> Certificates. Double check to make sure you didn't have a
certificate expiration where the renewed cert failed to install on that one
machine.
Boot the machine while connected to the wired LAN and log in, then check the
system and application logs for anything relating to group policy,
certificate auto-enrollment, or anything else that might be relevant.
If you're using IAS for RADIUS, go there and r-click the top item, Internet
Authentication Service -> Properties. Turn on both logging options and try
to connect, then check the system log on the SBS and see what happened when
the connection failed. You might be able to search based on information in
the connection failure messages and find some guidance. You'll want to turn
off one or both logging options after troubleshooting - I only log rejected
connections to avoid a zillion success entries.
See this article. FWIW, I would rather have oral surgery than try to make
sense of an eapol log - hopefully you'll be a lot better at that than I am.
Regardless, there's a lot more here than just that.
A Support Guide for Wireless Diagnostics and Troubleshooting
http://technet.microsoft.com/en-us/l.../bb457018.aspx
Probably the last resort is to call Dell support. You may have a tough time
convincing them that this is a hardware problem - probably when they hear
you can connect to an insecure network, they're going to blame your 802.1x
configuration. Depending on what you have available and your comfort level
inside a laptop, maybe you can switch NICs between two laptops and see if
the problem follows the NIC.
"Franz Leu" <> wrote in message
news:...
> Hi
>
> I have a SBS2003 with a WLAN that is setup with Access points that use
> RADUIS (certificates and settings from SBS2003 per GPO) for controlling
> access. This worked perfect for quite some time.
>
> Since a few weeks, one Dell mobile (D830) can not access anymore. It says
> that it is authenticating and returns to automatic w/o connecting.
>
> If I disable WPA with TKIP on the access point it connects t the WLAN
> perfectly. If I re-enable, the connection is gone.
>
> I checked all the settings and I cant find anything wrong. The certificate
> is valid, I even issued a new one while wired to the network.
> Any hints on how to debug this?
>
> Thanks
> Franz
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