https://community.cisco.com/t5/network-access-control/source-unknown-received-for-an-authentication-failed-log-in/m-p/2964017#M7289 <P>I can see the source:unknown recorded in for any authentication logs and i expect it to be source:IP address of the actual source. It is working fine on other switch versions, can any one of you confirm if this is expected and how to fix it?</P> Fri, 21 Feb 2020 18:31:39 GMT Nathaniel Horsch 2020-02-21T18:31:39Z https://community.cisco.com/t5/network-access-control/source-unknown-received-for-an-authentication-failed-log-in/m-p/2964017#M7289 <P>I can see the source:unknown recorded in for any authentication logs and i expect it to be source:IP address of the actual source. It is working fine on other switch versions, can any one of you confirm if this is expected and how to fix it?</P> Fri, 21 Feb 2020 18:31:39 GMT https://community.cisco.com/t5/network-access-control/source-unknown-received-for-an-authentication-failed-log-in/m-p/2964017#M7289 Nathaniel Horsch 2020-02-21T18:31:39Z https://community.cisco.com/t5/network-access-control/source-unknown-received-for-an-authentication-failed-log-in/m-p/2964018#M7290 <P>Hello Nathaniel-</P> <P>Unknown can be seen if the authentication method was not over IP. For instance, your console port, Aux port, etc.&nbsp;</P> <P>Can you see in your logs what port and protocol was used for the failed authentications?</P> <P><EM>Thank you for rating helpful posts!</EM></P> Wed, 14 Dec 2016 21:40:29 GMT https://community.cisco.com/t5/network-access-control/source-unknown-received-for-an-authentication-failed-log-in/m-p/2964018#M7290 nspasov 2016-12-14T21:40:29Z