VPN lofin fail error - 455
We use the FortiClient and user tried to login in SSL-VPN to FG300D.The VPN authetification used Radius-LDAP.
We always get the "Permission denied (-455)" error.This append for only one user.
We are login successfully with other account in the same computer.
I tried to analyse the logs and always received, unknow users.
VPN FortiSslvpn: Init:ConnectNamedPipe(): Wait(hEventOverLapped) OK.VPN FortiSslvpn: before ConnectNamedPipeVPN FortiSslvpn: Init:ConnectNamedPipe(): rc=0, err=997VPN FortiSslvpn: _ReceiveMessage: (000004CC)VPN id=96603 msg="SSLVPN tunnel connection failed (Error=-455).
In Fortigate applaiance in VPN Events the message is: sslvpn_login_unknown_user
Finally, I was able to reproduce this issue.I create a new user in AD and put it the VPN-Users-Group associate to Radius.I put the same password of my user that experiment the issue.Surprise, same message: error- -455.
I tested directly in the applaiance under Users, Raduis Server - Edit - Connectivity testwith this testing account and password: Result = Succesful.
I tried again in vpn,always fail.
I modify the password to remove special caracter in this case french accent "é" include in the password.Result lgin succesfull.I put the accent again in the password and login fail.
I don't test every type of caracters but I recommand my users to avoid any french accent in the password.