https://community.cisco.com/t5/network-access-control/acs-4-2-authentication-issue/m-p/1880526#M209066 <P>Hello, </P><P></P><P>I have a cisco ACS 4.2 having intermittent issue. user are getting access denied message whenever they wants to login to network devices. </P><P></P><P>From the acs below arfe the common error messages we have recieved.</P><P></P><P>1. EAP-TLS or PEAP authentication failed due to unknown CA certificate during SSL handshake </P><P></P><P>2. Authentication session invalidated </P><P></P><P></P><P>can anyone let me know what could be the issue &amp; how to resolve this?</P> Mon, 11 Mar 2019 01:50:45 GMT sushil123 2019-03-11T01:50:45Z https://community.cisco.com/t5/network-access-control/acs-4-2-authentication-issue/m-p/1880526#M209066 <P>Hello, </P><P></P><P>I have a cisco ACS 4.2 having intermittent issue. user are getting access denied message whenever they wants to login to network devices. </P><P></P><P>From the acs below arfe the common error messages we have recieved.</P><P></P><P>1. EAP-TLS or PEAP authentication failed due to unknown CA certificate during SSL handshake </P><P></P><P>2. Authentication session invalidated </P><P></P><P></P><P>can anyone let me know what could be the issue &amp; how to resolve this?</P> Mon, 11 Mar 2019 01:50:45 GMT https://community.cisco.com/t5/network-access-control/acs-4-2-authentication-issue/m-p/1880526#M209066 sushil123 2019-03-11T01:50:45Z