Hello all, I have google authentication Free Radius server. It is running Ubuntu. It is for 2 factor authentication for our Horzion View. Since yesterday afternoon, this radius server stopped working. It won't authenticator any domain users anymore. I ran radtest from the box itself, it gave me err message: radclient: no response from server for ID 88 socket 3 In the radius.log: Thu Dec 7 11:02:07 2017 : Error: Discarding duplicate request from client localhost port 50181 - ID: 222 due to unfinished request 0 Thu Dec 7 11:02:12 2017 : Error: Discarding duplicate request from client localhost port 50181 - ID: 222 due to unfinished request 0 Thu Dec 7 11:02:34 2017 : Error: WARNING: Unresponsive child for request 0, in component authenticate module pam Thu Dec 7 11:02:35 2017 : Info: WARNING: Child is hung for request 0 in component authenticate module pam. Thu Dec 7 11:02:37 2017 : Info: WARNING: Child is hung for request 0 in component authenticate module pam. Thu Dec 7 11:02:39 2017 : Info: WARNING: Child is hung for request 0 in component authenticate module pam. Thu Dec 7 11:02:42 2017 : Info: WARNING: Child is hung for request 0 in component authenticate module pam. Would you please tell me how to solve the issues? Thank you