topic Re: ACS 4.0 Authen-Failure-Code in Wireless https://community.cisco.com/t5/wireless/acs-4-0-authen-failure-code/m-p/539573#M34648 <HTML><HEAD></HEAD><BODY><P>Are you trying to authenticate Windows xp clients using PEAP,If so i dont think so it will workout, you have to use Cisco's aironet client utility for PEAP against ACS.</P></BODY></HTML> Tue, 09 May 2006 18:40:07 GMT aghaznavi 2006-05-09T18:40:07Z ACS 4.0 Authen-Failure-Code https://community.cisco.com/t5/wireless/acs-4-0-authen-failure-code/m-p/539572#M34647 <P>Hi,</P><P></P><P>I'm getting this Authen-Failure-Code in Failed attempts report when I try to authenticate with PEAP against a ACS 4.0:</P><P></P><P>"Authetication session invalidated"</P><P></P><P>I'm not able to find ny reference to what this means ? has anyone any info on this and what it points to as a problem?</P><P></P><P>best regards rolf</P> Sun, 04 Jul 2021 19:02:16 GMT https://community.cisco.com/t5/wireless/acs-4-0-authen-failure-code/m-p/539572#M34647 lunestadr 2021-07-04T19:02:16Z Re: ACS 4.0 Authen-Failure-Code https://community.cisco.com/t5/wireless/acs-4-0-authen-failure-code/m-p/539573#M34648 <HTML><HEAD></HEAD><BODY><P>Are you trying to authenticate Windows xp clients using PEAP,If so i dont think so it will workout, you have to use Cisco's aironet client utility for PEAP against ACS.</P></BODY></HTML> Tue, 09 May 2006 18:40:07 GMT https://community.cisco.com/t5/wireless/acs-4-0-authen-failure-code/m-p/539573#M34648 aghaznavi 2006-05-09T18:40:07Z