Oct 13 14:29:51 localhost pptpd[5642]: CTRL: Client 10.10.10.86 control connection started
Oct 13 14:29:51 localhost pptpd[5642]: CTRL: Starting call (launching pppd, opening GRE)
Oct 13 14:29:51 localhost pppd[5643]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Oct 13 14:29:51 localhost pppd[5643]: The remote system is required to authenticate itself
Oct 13 14:29:51 localhost pppd[5643]: but I couldn't find any suitable secret (password) for it to use to do so.
Oct 13 14:29:51 localhost pppd[5643]: (None of the available passwords would let it use an IP address.)
Oct 13 14:29:51 localhost pptpd[5642]: GRE: read(fd=6,buffer=8059680,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Oct 13 14:29:51 localhost pptpd[5642]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Oct 13 14:29:51 localhost pptpd[5642]: CTRL: Client 10.10.10.86 control connection finished