Here is the output from the debug screen... The authorization process as below loops when I switch on the encryption. Without any encryption it works quite perfect. Or is it 'not' possible to use mac authentication and WEP/WPA with preshared key at the same time? *NoIdeaWhatHappens* - - - - - - - - - Module: Instantiated detail (reply_log) Listening on authentication *:1812 Listening on accounting *:1813 Ready to process requests. rad_recv: Access-Request packet from host 172.19.0.11:1261, id=188, length=73 User-Name = "00-19-d2-2a-61-50" User-Password = 00-19-d2-2a-61-50" Processing the authorize section of radiusd.conf modcall: entering group authorize for request 0 modcall[authorize]: module "preprocess" returns ok for request 0 radius_xlat: '../var/log/radius/radacct/172.19.0.11/auth-detail-20070613.log' rlm_detail: ../var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d.lo g expands to ../var/log/radius/radacct/172.19.0.11/auth-detail-20070613.log modcall[authorize]: module "auth_log" returns ok for request 0 rlm_realm: No '@' in User-Name = "00-19-d2-2a-61-50", looking up realm NULL rlm_realm: No such realm "NULL" modcall[authorize]: module "suffix" returns noop for request 0 users: Matched entry 00-19-d2-2a-61-50 at line 3 modcall[authorize]: module "files" returns ok for request 0 rlm_pap: Found existing Auth-Type, not changing it. modcall[authorize]: module "pap" returns noop for request 0 modcall: leaving group authorize (returns ok) for request 0 rad_check_password: Found Auth-Type Accept rad_check_password: Auth-Type = Accept, accepting the user Login OK: [00-19-d2-2a-61-50/00-19-d2-2a-61-50] (from client wlanedv port 0) Processing the post-auth section of radiusd.conf modcall: entering group post-auth for request 0 radius_xlat: '../var/log/radius/radacct/172.19.0.11/reply-detail-20070613.log' rlm_detail: ../var/log/radius/radacct/%{Client-IP-Address}/reply-detail-%Y%m%d.l og expands to ../var/log/radius/radacct/172.19.0.11/reply-detail-20070613.log modcall[post-auth]: module "reply_log" returns ok for request 0 modcall: leaving group post-auth (returns ok) for request 0 Sending Access-Accept of id 188 to 172.19.0.11 port 1261 Finished request 0 Going to the next request - - - - - - - - Wavin GmbH - Sitz der Gesellschaft: 49767 Twist - Registergericht: AG Osnabr�ck Abt. B 120003 - Gesch�ftsf�hrung: J�rgen Frei, Maarten Roef - Vors.d. Aufsichtsrates: Henk ten Hove