Несовместимость PPTP на MikroTik и Fortigate [решено]

Моя проблема отчетливо видна в логе ниже:

21:52:16 pptp,ppp,debug,packet  pptp-out1: rcvd IPCP ConfReq id=0x1
21:52:16 pptp,ppp,debug,packet     <addr 192.168.196.10>
21:52:16 pptp,ppp,debug,packet     <comp VJ f 1>
21:52:16 pptp,ppp,debug,packet     <ms-dns 0.0.0.0>
21:52:16 pptp,ppp,debug,packet     <ms-dns 0.0.0.0>
21:52:16 pptp,ppp,debug pptp-out1: IPCP received packet in initial state
21:52:16 pptp,ppp,debug,packet  pptp-out1: rcvd CCP ConfReq id=0x1
21:52:16 pptp,ppp,debug,packet     <deflate 17 method 7>
21:52:16 pptp,ppp,debug,packet     <deflate (old) 17 method 7>
21:52:16 pptp,ppp,debug,packet     <mppe 10000e1>
21:52:16 pptp,ppp,debug,packet     <0x15 03 2f>
21:52:16 pptp,ppp,debug pptp-out1: CCP received packet in initial state
21:52:18 pptp,ppp,debug,packet  pptp-out1: rcvd LCP EchoReq id=0x1
21:52:18 pptp,ppp,debug,packet     <magic 0xb7a92743>
21:52:18 pptp,ppp,debug,packet  pptp-out1: sent LCP EchoRep id=0x1
21:52:18 pptp,ppp,debug,packet     <magic 0x46f34954>
21:52:19 pptp,ppp,debug,packet  pptp-out1: sent CHAP Response id=0x1
21:52:19 pptp,ppp,debug,packet
21:52:19 pptp,ppp,debug,packet
21:52:19 pptp,ppp,debug,packet  pptp-out1: rcvd CHAP Success id=0x1
21:52:19 pptp,ppp,debug,packet     Welcome to fg-complex.
21:52:19 pptp,ppp,error wrong MS-CHAPv2 response from peer
21:52:19 pptp,ppp,debug,packet  pptp-out1: rcvd IPCP ConfReq id=0x1
21:52:19 pptp,ppp,debug,packet     <addr 192.168.196.10>
21:52:19 pptp,ppp,debug,packet     <comp VJ f 1>
21:52:19 pptp,ppp,debug,packet     <ms-dns 0.0.0.0>
21:52:19 pptp,ppp,debug,packet     <ms-dns 0.0.0.0>
21:52:19 pptp,ppp,debug pptp-out1: IPCP received packet in initial state
21:52:19 pptp,ppp,debug,packet  pptp-out1: rcvd CCP ConfReq id=0x1
21:52:19 pptp,ppp,debug,packet     <deflate 17 method 7>
21:52:19 pptp,ppp,debug,packet     <deflate (old) 17 method 7>
21:52:19 pptp,ppp,debug,packet     <mppe 10000e1>
21:52:19 pptp,ppp,debug,packet     <0x15 03 2f>
21:52:19 pptp,ppp,debug pptp-out1: CCP received packet in initial state
21:52:22 pptp,ppp,debug,packet  pptp-out1: sent CHAP Response id=0x1
21:52:22 pptp,ppp,debug,packet
21:52:22 pptp,ppp,debug,packet
21:52:22 pptp,ppp,debug,packet  pptp-out1: rcvd CHAP Success id=0x1
21:52:22 pptp,ppp,debug,packet     Welcome to fg-complex.
21:52:22 pptp,ppp,error wrong MS-CHAPv2 response from peer

В этом фрагменте Fortigate отправляет "сообщение приветствия", а MikroTik говорит, что оно неверно - аутентификация не может быть завершена, и это повторяется бесконечно. Fortigate - PPTP-сервер, а MT - клиент. Fortigate отправляет неверное сообщение или MikroTik слишком чувствителен?