topic ACS authentication problem in Network Access Control https://community.cisco.com/t5/network-access-control/acs-authentication-problem/m-p/59942#M6441 <P>I configured 2 ACS v3.0 servers on 2 w2k servers and they worked fine, initially. However, after doing something(seems that it's replicating database between the 2 ACS servers, but not sure), when I telnet into a AAA client router, I was only prompted for username, but not password. That is, after I entered the username and press 'enter', nothing happened but an 'Authentication failed' message. I got no way to enter the password. Does someone encounter this before?</P> Fri, 21 Feb 2020 18:03:02 GMT y.lo 2020-02-21T18:03:02Z ACS authentication problem https://community.cisco.com/t5/network-access-control/acs-authentication-problem/m-p/59942#M6441 <P>I configured 2 ACS v3.0 servers on 2 w2k servers and they worked fine, initially. However, after doing something(seems that it's replicating database between the 2 ACS servers, but not sure), when I telnet into a AAA client router, I was only prompted for username, but not password. That is, after I entered the username and press 'enter', nothing happened but an 'Authentication failed' message. I got no way to enter the password. Does someone encounter this before?</P> Fri, 21 Feb 2020 18:03:02 GMT https://community.cisco.com/t5/network-access-control/acs-authentication-problem/m-p/59942#M6441 y.lo 2020-02-21T18:03:02Z Re: ACS authentication problem https://community.cisco.com/t5/network-access-control/acs-authentication-problem/m-p/59943#M6443 <HTML><HEAD></HEAD><BODY><P>You might want to enable a few debugs on the router, ie:</P><P>debug aaa authentication</P><P>debug aaa authorization</P><P>debug radius (or tacacs) </P><P></P><P>You would then be able to identity the phase it is failing, and might provide some clues on it. There is a good troubleshooting guide on:</P><P><A class="jive-link-custom" href="http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/secsols/aaasols/c262c6.htm" target="_blank">http://www.cisco.com/univercd/cc/td/doc/cisintwk/intsolns/secsols/aaasols/c262c6.htm</A></P><P></P></BODY></HTML> Wed, 21 Aug 2002 21:27:14 GMT https://community.cisco.com/t5/network-access-control/acs-authentication-problem/m-p/59943#M6443 cjacinto 2002-08-21T21:27:14Z