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CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
GRE: xmit failed from decaps_hdlc: Operation not permitted
CTRL: PTY read or GRE write failed (pty,gre)=(6,7)Jan 10 22:52:54 vpn12 pptpd[18635]: GRE: read(fd=6,buffer=611860,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Jan 10 22:52:54 vpn12 pptpd[18635]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Run the following:
iptables -A INPUT -p 47 -j ACCEPT
GRE is protocol 47 so you need to make sure you allow it.
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