<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are trying to authenticate from Windows machine and getting below error.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>--------------------<br><span style='font-family:"Courier New"'>Sep 30 14:07:34 kdc1.domain.com krb5kdc[10105](info): AS_REQ (7 etypes {18 17 23 3 1 24 -135}) 10.43.2.45: NEEDED_PREAUTH: user@DOMAIN.COM for krbtgt/DOMAIN.COM@DOMAIN.COM, Additional pre-authentication required<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>Sep 30 14:07:34 kdc1.domain.com krb5kdc[10105](info): AS_REQ (7 etypes {18 17 23 3 1 24 -135}) 10.43.2.45: ISSUE: authtime 1380550054, etypes {rep=18 tkt=18 ses=18}, user@DOMAIN.COM for krbtgt/DOMAIN.COM@DOMAIN.COM<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Courier New"'>Sep 30 14:07:34 kdc1.domain.com krb5kdc[10105](info): TGS_REQ (7 etypes {18 17 23 3 1 24 -135}) 10.43.2.45: ISSUE: authtime 1380550054, etypes {rep=18 tkt=23 ses=23}, user@DOMAIN.COM for host/av.domain.com@DOMAIN.COM</span><br>--------------------<br><br><o:p></o:p></p><p class=MsoNormal>We followed the instruction to integrate windows for authentication.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Windows Client: Windows server 2008 R2<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are not able to figure out what the problem is.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>We are not using DNS server, instead we are using host file entries. DNS server setup is not an option for us right now.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Same user can authenticate from Linux machine.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards,<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:purple'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif";color:purple'>Mohan Cheema</span></b><span lang=EN-GB style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>