I am perfectly willing to accept that you may be right and this may be my issue, I just don't understand how it has suddenly become a problem.
Are you using a Cisco Wireless LAN Controller (WLC)? We had a similar issue with our Cisco 2112 WLC (EAP conversation stops on the NAS/supplicant side). For what it's worth, our WLC was working fine for a while and then suddenly stopped. A reboot fixed it one time, but then it eventually failed again and a reboot didn't fix it. It was resolved by changing a setting in the WLC (I'll get you the details if it's applicable).
We are indeed. Cisco Wireless Control System with 4 Cisco 4400 series WLAN controllers, with about 300 connected Cisco APs spread across the 4 of them. I thought i'd got it just now, as I got it working reliably from several different machines in our office with freeradius in debug mode (but without changing anything, which I found very odd). Just to check, I restarted samba, winbind and freeradius. Now all of a sudden it's not working again. ntlm_auth is working and returning an nt key but the Access-Challenge is not being responded to where 2 minutes ago it was just fine. It never occurred to me that the Cisco controllers could be our issue... Though I have just checked with a colleague and he did try restarting them after hours yesterday, and it didn't help matters. If you can find out what setting you changed that would be ideal, but probably best to email me directly as this is getting somewhat off-topic for the list. -- Dan Meyers Network Specialist, Lancaster University E-Mail: d.meyers@lancaster.ac.uk