centos 5.3 ppp-2.4.3 pptpd-1.3.3 kernel_ppp_mppe-1.0.2-3dkms
lsmod 里加载了 ppp_mppe ip_gre
Oct 16 18:31:19 centos pptpd[13424]: CTRL: Client 192.168.20.186 control connection started
Oct 16 18:31:19 centos pptpd
[13424]: CTRL: Starting call (launching pppd, opening GRE)
Oct 16 18:31:19 centos pptpd[13424]: GRE: read
(fd=6,buffer=804e5e0,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 16 18:31:19 centos pptpd[13424]: CTRL: PTY read or GRE write
failed (pty,gre)=(6,7)
Oct 16 18:31:19 centos pptpd[13424]: CTRL: Client 192.168.20.186 control connection finished
.
这个是什么问题