Hello guys.
I have several virtual servers with mikrotik os
Recently i buy a new server mikrotik os
I try to connect with pptp … but still i have 628 error → Hang on username and password veryfing
All configurations are correct, such as the servers
http://uupload.ir/files/zhr6_32.jpg
What’s the problem ? (sry for my bad english:) )
Unfortunately, your image is not really helpful - a dump of /ppp profile export would have been much better 
At first, I’d suggest to change your “local address” to “pool1” as well - I wouldn’t be surprised if having your public address as peer address for a tunnel already is your problem.
If that doesn’t help, try switching “Use Encryption” (find this in the protocols tab of the ppp profile) from “default” to “required”.
And I’d advise not to use pap for authentication.
Good luck,
-Chris
PS: Aren’t you worried about the login attempts on ssh from WAN?
I hope new images will help you, Settings updated.
I can connect only in server (image 4) , tried different ways but I didn’t succeed involved in about 10 days …
can i give you information for check …
Try disabling CHAP and only leave mschap2 and mschap1 active.
You can get more detailed logs when adding pptp to /system logging
-Chris
It got but again don’t working
Well, the topic is old, and the protocol is legacy, but someone should still use it as, even if it’s just for tshoot, well I had the same problem trying to connect a windows client to a pptp srv.
In this Microsoft community link, https://support.microsoft.com/pt-br/help/923944/list-of-error-codes-that-you-may-receive-when-you-try-to-make-a-dial-u In this Microsoft community link, it says that error 628 is that the port has been disconnected.
Well in some searches, I found it could be something about encryption, it was the one where I veiriquei in my SRV VPN in profiles in the protocols tab, the encryption option was not checked, and in the configuration properties of the ppp interface in the MS client was selected, the option if you do not have encryption disconnect.
in this case to test I enabled the encryption and works perfectly, but has options where you can choose to keep connected if it has or not encryption.
This error occurred in Win 7, already in Win 10, I did not have this problem.