How to verify PPTP service is configured properly and is serving correctly?

I am trying to set up a PPTP server on my VPS running Ubuntu 16.04. I have followed all the steps as detailed in the below two links:

https://help.ubuntu.com/community/PPTPServer
https://bobcares.com/blog/install-pptp-server-ubuntu/

However, I cannot VPN to my VPS neither from Windows 10, nor Ubunto 22.04, nor Android.

I am pretty experienced in System Administration though I am not good at networking, to be honest.

I need to take steps to pinpoint the problem.

The pptpd service seems functioning pretty well.

mike@vpsXXX:~$ netstat -ntl
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:1723            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:1822            0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN
tcp6       0      0 :::80                   :::*                    LISTEN
tcp6       0      0 :::1822                 :::*                    LISTEN
mike@vpsXXX:~$ sudo service pptpd status
[sudo] password for mike:
● pptpd.service - PoPToP Point to Point Tunneling Server
   Loaded: loaded (/lib/systemd/system/pptpd.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2023-07-08 09:22:42 EDT; 5h 56min ago
 Main PID: 20218 (pptpd)
    Tasks: 1
   Memory: 156.0K
      CPU: 12ms
   CGroup: /system.slice/pptpd.service
           └─20218 /usr/sbin/pptpd --fg

Jul 08 13:48:07 vpsXXX pptpd[20808]: CTRL: Client 198.199.93.96 control connection started
Jul 08 15:02:19 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:04:20 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:06:21 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:08:21 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:10:22 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:12:23 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:14:24 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:16:24 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
Jul 08 15:18:25 vpsXXX pptpd[20218]: MGR: dropped slow initial connection
mike@vpsXXX:~$

I need to take steps to pinpoint the problem. Any comment/clue is much appreciated.

I came across this How to fix MGR: dropped slow initial connection with pptpd? which seems relevant since I get the same warnings as check the pptpd’s status.

Asked By: Mike IT Expert

||

If you are trying to set up a VPN, Open Connect is a better alternative working for Iran for now. It comes both with a mobile app and a desktop client. It also offers user management where you can add, delete, lock, and unlock users.

Just google How to Set Up the OpenConnect VPN Server to find good tutorials. There are plenty out there online.

Answered By: Mike IT Expert
Categories: Answers Tags: , , ,
Answers are sorted by their score. The answer accepted by the question owner as the best is marked with
at the top-right corner.