SYMPTOMS: after setup Routing and Remote Access service for VPN or dial-up on a server to use RADIUS, or upgrade the server to a new OS, 1) the client computers may receive the following error message: Error 930: The authentication server did not respond to authentication requests in a timely fashion. 2) On the RRAS server Event ID: 20073 The following error occurred in the Point-to-Point Protocol module port: Port, UserName: Username. The authentication server did not respond to authentication requests in a timely fashion. 3) On the IAS server, the following error message may be reported Event ID: 13 A request was received from the invalid client IP Address IP_Address.

Causes: 1) The default path to the Remote Access log file has been changed or is not valid.
2) The VPN server has not been set up as a RADIUS client in the IAS.
3) This behavior will occur if the VPN user has permissions to read only on the Active Directory directory service record.
4) Refer to error 619 resolution - add the vpn to the appropriate group.

Refer to 072704RLa