Core:
Feb 16 11:51:33 erp pptpd[21641]: CTRL: Client 192.168.68.206 control connection started
Feb 16 11:51:33 erp pptpd[21641]: CTRL: Starting call (launching pppd, opening GRE)
Feb 16 11:51:33 erp pppd[21642]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so is for pppd version 2.4.3, this is 2.4.4
Feb 16 11:51:33 erp pptpd[21641]: GRE: read(fd=6,buffer=8058f40,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Feb 16 11:51:33 erp pptpd[21641]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Feb 16 11:51:33 erp pptpd[21641]: CTRL: Client 192.168.68.206 control connection finished