/var/log/kernel/info
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: pppd options file = /etc/ppp/options.pptpd
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Client 192.168.66.44 control connection started
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Received PPTP Control Message (type: 1)
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Made a START CTRL CONN RPLY packet
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: I wrote 156 bytes to the client.
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Sent packet to client
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Received PPTP Control Message (type: 7)
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Set parameters to 1525 maxbps, 64 window size
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Made a OUT CALL RPLY packet
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Starting call (launching pppd, opening GRE)
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: pty_fd = 5
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: tty_fd = 6
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: I wrote 32 bytes to the client.
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Sent packet to client
Apr  7 17:43:51 o3 pptpd[1385]: CTRL (PPPD Launcher): Connection speed = 115200
Apr  7 17:43:51 o3 pptpd[1385]: CTRL (PPPD Launcher): local address = 10.10.10.1
Apr  7 17:43:51 o3 pptpd[1385]: CTRL (PPPD Launcher): remote address = 10.10.10.11
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Received PPTP Control Message (type: 15)
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Got a SET LINK INFO packet with standard ACCMs
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Client 192.168.66.44 control connection finished
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Exiting now
Apr  7 17:43:51 o3 pptpd[1241]: MGR: Reaped child 1384

/var/log/messages
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Client 192.168.66.44 control connection started
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Starting call (launching pppd, opening GRE)
Apr  7 17:43:51 o3 pptpd[1384]: GRE: read(fd=5,buffer=804d620,len=8196) from PTY failed: status = -1 error = Input/output error
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: PTY read or GRE write failed (pty,gre)=(5,6)
Apr  7 17:43:51 o3 pptpd[1384]: CTRL: Client 192.168.66.44 control connection finished