Hi, We use Free Radius PAM_RADIUS_AUTH (version 1.3.16) intergrated into Linux from WindRiver distribution based on kernel 2.6.10 As Radius Server we use Internet Authentication Server from Win2000 Server. We can not receive authentication for user defined on the Radius Server. Here the Warning that is logged on the Radius Server for this event: User slb was denied access. Fully-Qualified-User-Name = KERNEL\slb NAS-IP-Address = 127.0.0.1 NAS-Identifier = check Called-Station-Identifier = <not present> Calling-Station-Identifier = 135.64.103.49 Client-Friendly-Name = 149.49.76.121 Client-IP-Address = 149.49.76.121 NAS-Port-Type = Virtual NAS-Port = 16015 Policy-Name = <undetermined> Authentication-Type = PAP EAP-Type = <undetermined> Reason-Code = 16 Reason = There was an authentication failure because of an unknown user name or a bad password. Using the same PAM_RADIUS_AUTH installed on VMware Player (version 1.0.1) enables us receive authentication for the same user. Here the Information that is logged on the Radius Server for this event: User slb was granted access. Fully-Qualified-User-Name = KERNEL\slb NAS-IP-Address = 127.0.0.1 NAS-Identifier = check Client-Friendly-Name = 135.64.102.130 Client-IP-Address = 135.64.102.130 NAS-Port-Type = Virtual NAS-Port = 24935 Policy-Name = GAdmin Authentication-Type = PAP EAP-Type = <undetermined> Both Radius clients ( for Linux and for VmWare) are configured absolutely identical on the Radius Server. The same user, same password and the same shared secret are used. What can be the problem? Thank you, Jenny