MT PPTP+Radius on Synology

RouterOS General
1

Hello,

Been scratching my head for some time with this problem.

PPTP server setup and working on a MT RB1100AHx4.
All the user accounts are already setup on a Synology NAS, so I have installed and enabled the Radius package on Synology.
Setup the Radius server information on MT.

Now, on a remote Windows 10 PC, a simple PPTP connection is established and authenticated via Synology Radius. Everything works as it should.
Nevertheless, on Android or a Windows 7 PC, the connection is never fully established.

MT logs shows:

03:11:19 pptp,info TCP connection established from 5.12.108.162 
03:11:19 pptp,ppp,info,account user1 logged in, 192.168.150.2
03:11:19 pptp,ppp,info <pptp-user1>: authenticated 
03:11:19 pptp,ppp,info <pptp-user1>: terminating... 
03:11:19 pptp,ppp,info,account user1 logged out, 0 64 54 4 6 
03:11:19 pptp,ppp,info <pptp-user1>: disconnected

Synology Radius log shows:

Login OK: [user1] (from client Mikrotik port 15728659 cli 5.12.108.162)
Error: [mschap] Invalid LM-Password

On the Windows 10 PC, the same error regarding LM-Password shows in Synology Radius log, but the connection always succeeds.
On the Windows 7 PC and an Android phone, the connections always fails.

If I bypass Mikrotik’s VPN server and use the Synology PPTP server, every device connects just fine.

I know it is a shot in the dark, but maybe someone else had this problem and found a fix.

Thank you.

2

Found the missing " , "

The PPP profile I setup for the PPTP server had “Use encryption” set to “default”
It seems the Windows 10 VPN client can connect without encryption, while Windows 7 and the Android clients cannot (by default)
To fix this, I setup “Use encryption” to “required”.

Error: [mschap] Invalid LM-Password

is still logged on Radius server, but I guess it is just a “feature” :smiley: