Hi, I have trouble with one XP-SP2 client, using a certificate to make 802.1x Auth over EAP-TLS. The cert is a machine cert. On the serverside I get this (using -X -A) in authenticate: modcall: entering group authenticate for request 33 rlm_eap: Request found, released from the list rlm_eap: EAP/tls rlm_eap: processing type tls rlm_eap_tls: Authenticate rlm_eap_tls: processing TLS rlm_eap_tls: Length Included eaptls_verify returned 11 (other): before/accept initialization TLS_accept: before/accept initialization rlm_eap_tls: <<< TLS 1.0 Handshake [length 0041], ClientHello TLS_accept: SSLv3 read client hello A rlm_eap_tls: >>> TLS 1.0 Handshake [length 004a], ServerHello TLS_accept: SSLv3 write server hello A rlm_eap_tls: >>> TLS 1.0 Handshake [length 0ef8], Certificate TLS_accept: SSLv3 write certificate A rlm_eap_tls: >>> TLS 1.0 Handshake [length 00bd], CertificateRequest TLS_accept: SSLv3 write certificate request A TLS_accept: SSLv3 flush data TLS_accept:error in SSLv3 read client certificate A In SSL Handshake Phase In SSL Accept mode eaptls_process returned 13 modcall[authenticate]: module "eap" returns handled for request 33 modcall: leaving group authenticate (returns handled) for request 33 Sending Access-Challenge of id 0 to 10.48.244.21 port 49154 EAP-Message = 0x0125040a0dc00000100e1[...] Which indicates that there is a problem in the client-cert. Can it be more detailed? I exported the cert and the key now 4 times in different manners (as p12, as der) and the errors is still there. Extended attribute is also included. The funny thing is, that I already have 5 XP machines running in my network, doing an EAP-TLS auth over the switch. It means also that in my authorize section (Auth-Type := EAP) I can get a Access-Accept Message. On the server I get the Access-Requests, create a Access-Challenge and thats all. Theres nothing coming back from the client. Please help Alex -- ServiceCenter IT - Alexandros Gougousoudis (Leiter) Gemeinsame Einrichtung der Kunsthochschule Berlin-Weissensee, Hochschule für Musik "Hanns Eisler" und der Hochschule für Schauspielkunst "Ernst Busch". Tel.: 030 / 477 05 - 444 * Fax.: 030 / 477 05 - 445