What and where credentials are logged when you connect to a network?

[flawl3ss]

Thanks again everyone. I'm not real up on this certificate based wifi encryption, but my new key would take weeks to brute force and would never be in a dictionary.

Now I'll look into IDS and/or ArpWatch, as I would like a free solution. Thanks again!

[Packet]

To echo what many others have said, an IDS is your best bet for such a problem. Particularly, I recommend the Snort IDS. It is very effective, and offers both free rulesets (they are 30 days old, but will catch most skiddie junk), and subscription rulesets (the latest and greatest, but cost money).