I am trying to connect private internet access vpn via pptp. but its keeps getting disconnected
Jul/08/2019 10:52:57 pptp,debug,packet sent Start-Control-Connection-Request to 162.216.46.157
Jul/08/2019 10:52:57 pptp,debug,packet protocol-version=0x0100
Jul/08/2019 10:52:57 pptp,debug,packet framing-capabilities=2
Jul/08/2019 10:52:57 pptp,debug,packet bearer-capabilities=0
Jul/08/2019 10:52:57 pptp,debug,packet maximum-channels=0
Jul/08/2019 10:52:57 pptp,debug,packet firmware-revision=1
Jul/08/2019 10:52:57 pptp,debug,packet host-name=D52G
Jul/08/2019 10:52:57 pptp,debug,packet vendor-name=MikroTik
Jul/08/2019 10:52:58 pptp,debug,packet rcvd Start-Control-Connection-Reply from 162.216.46.157
Jul/08/2019 10:52:58 pptp,debug,packet protocol-version=0x0100
Jul/08/2019 10:52:58 pptp,debug,packet result-code=1
Jul/08/2019 10:52:58 pptp,debug,packet error-code=0
Jul/08/2019 10:52:58 pptp,debug,packet framing-capabilities=0
Jul/08/2019 10:52:58 pptp,debug,packet bearer-capabilities=0
Jul/08/2019 10:52:58 pptp,debug,packet maximum-channels=1
Jul/08/2019 10:52:58 pptp,debug,packet firmware-revision=1
Jul/08/2019 10:52:58 pptp,debug,packet host-name=local
Jul/08/2019 10:52:58 pptp,debug,packet vendor-name=linux
Jul/08/2019 10:52:58 pptp,debug,packet sent Outgoing-Call-Request to 162.216.46.157
Jul/08/2019 10:52:58 pptp,debug,packet call-id=0
Jul/08/2019 10:52:58 pptp,debug,packet call-serial-number=0
Jul/08/2019 10:52:58 pptp,debug,packet minimum-bps=2400
Jul/08/2019 10:52:58 pptp,debug,packet maximum-bps=10000000
Jul/08/2019 10:52:58 pptp,debug,packet bearer-type=3
Jul/08/2019 10:52:58 pptp,debug,packet framing-type=2
Jul/08/2019 10:52:58 pptp,debug,packet packet-recv-window-size=100
Jul/08/2019 10:52:58 pptp,debug,packet packet-processing-delay=0
Jul/08/2019 10:52:58 pptp,debug,packet phone-number-length=0
Jul/08/2019 10:52:58 pptp,debug,packet phone-number=
Jul/08/2019 10:52:58 pptp,debug,packet subaddress=
Jul/08/2019 10:52:58 pptp,debug,packet rcvd Outgoing-Call-Reply from 162.216.46.157
Jul/08/2019 10:52:58 pptp,debug,packet call-id=18304
Jul/08/2019 10:52:58 pptp,debug,packet peers-call-id=0
Jul/08/2019 10:52:58 pptp,debug,packet result-code=1
Jul/08/2019 10:52:58 pptp,debug,packet error-code=0
Jul/08/2019 10:52:58 pptp,debug,packet cause-code=0
Jul/08/2019 10:52:58 pptp,debug,packet connect-speed=10000000
Jul/08/2019 10:52:58 pptp,debug,packet packet-recv-window-size=100
Jul/08/2019 10:52:58 pptp,debug,packet packet-processing-delay=0
Jul/08/2019 10:52:58 pptp,debug,packet physical-channel-id=0
Jul/08/2019 10:52:58 pptp,ppp,debug us-texas: LCP lowerup
Jul/08/2019 10:52:58 pptp,ppp,debug,packet us-texas: sent us-texas: sent LCP ConfReq id=0x1b
Jul/08/2019 10:52:58 pptp,ppp,debug,packet <mru 1450>
Jul/08/2019 10:52:58 pptp,ppp,debug,packet <magic 0x4dd88b5e>
Jul/08/2019 10:52:58 pptp,ppp,debug us-texas: LCP open
Jul/08/2019 10:52:58 route,debug,event Remove interface us-texas
Jul/08/2019 10:52:58 route,debug,calc Begin calculation
Jul/08/2019 10:52:58 route,debug,calc End calculation
Jul/08/2019 10:52:58 route,debug Begin redistribution
Jul/08/2019 10:52:58 route,debug Accept withdraw 0.0.0.0/0
Jul/08/2019 10:52:58 route,debug Commit prefix 0.0.0.0/0
Jul/08/2019 10:52:58 route,debug End redistribution
Have a look at http://forum.mikrotik.com/t/v6-45-1-stable-is-released/131227/275
I had the same issue since 6.45.1 and enabling the pptp helper service solved the issue in my case:
/ip firewall service-port enable pptp