我已经使用 ubuntu's guide 创建了一个 PPTP VPN 服务器.

现在我有:



我现在的问题是我的安卓手机无法连接到我创建的 pptp。当我尝试输入用户名和密码然后点击连接时，我收到的唯一消息是正在连接...，但之后是不成功。

所以我搜索并找到了这个link有关如何连接到我的 PPTP VPN 的一般概述。我也来了here但我仍然无法将手机连接到 VPN。我完全遵循了ubuntu's guide说的是，我现在不知道该怎么做才能实现我的目标。请提供一些链接或指南，以便我的 Android 手机能够连接到我的 PPTP VPN。

服务器的系统日志

Aug 26 14:44:50 jameshwart-System-Product-Name pptpd[31320]: CTRL: Client 192.168.1.27 control connection started
Aug 26 14:44:51 jameshwart-System-Product-Name pptpd[31320]: CTRL: Starting call (launching pppd, opening GRE)
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: Plugin /usr/lib/pptpd/pptpd-logwtmp.so loaded.
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: pppd 2.4.5 started by root, uid 0
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: Using interface ppp0
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: Connect: ppp0 <--> /dev/pts/24
Aug 26 14:44:51 jameshwart-System-Product-Name NetworkManager[969]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Aug 26 14:44:51 jameshwart-System-Product-Name NetworkManager[969]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Aug 26 14:44:51 jameshwart-System-Product-Name NetworkManager[969]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: peer from calling number 192.168.1.27 authorized
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: MPPE required, but MS-CHAP[v2] nor EAP-TLS auth are performed.
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: Connection terminated.
Aug 26 14:44:51 jameshwart-System-Product-Name NetworkManager[969]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Aug 26 14:44:51 jameshwart-System-Product-Name pppd[31321]: Exit.
Aug 26 14:44:51 jameshwart-System-Product-Name pptpd[31320]: GRE: read(fd=6,buffer=7f2daa2874a0,len=8196) from PTY failed: status = -1 error = Input/output error, usually caused by unexpected termination of pppd, check option syntax and pppd logs
Aug 26 14:44:51 jameshwart-System-Product-Name pptpd[31320]: CTRL: PTY read or GRE write failed (pty,gre)=(6,7)
Aug 26 14:44:51 jameshwart-System-Product-Name pptpd[31320]: CTRL: Reaping child PPP[31321]
Aug 26 14:44:51 jameshwart-System-Product-Name pptpd[31320]: CTRL: Client 192.168.1.27 control connection finished

客户端的系统日志

Sent control packet type is 1 'Start-Control-Connection-Request'
Aug 26 14:45:17 felman-To-be-filled-by-O-E-M pptp[10347]: nm-pptp-service-10324 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Aug 26 14:45:17 felman-To-be-filled-by-O-E-M pptp[10347]: nm-pptp-service-10324 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Aug 26 14:45:18 felman-To-be-filled-by-O-E-M pptp[10347]: nm-pptp-service-10324 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Aug 26 14:45:18 felman-To-be-filled-by-O-E-M pptp[10347]: nm-pptp-service-10324 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Aug 26 14:45:18 felman-To-be-filled-by-O-E-M pptp[10347]: nm-pptp-service-10324 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 21504).
Aug 26 14:45:18 felman-To-be-filled-by-O-E-M pppd[10328]: CHAP authentication succeeded
Aug 26 14:45:19 felman-To-be-filled-by-O-E-M pppd[10328]: MPPE 128-bit stateless compression e

options.pptp 文件

###############################################################################
# $Id: options.pptp,v 1.3 2006/03/26 23:11:05 quozl Exp $
#
# Sample PPTP PPP options file /etc/ppp/options.pptp
# Options used by PPP when a connection is made by a PPTP client.
# This file can be referred to by an /etc/ppp/peers file for the tunnel.
# Changes are effective on the next connection.  See "man pppd".
#
# You are expected to change this file to suit your system.  As
# packaged, it requires PPP 2.4.2 or later from http://ppp.samba.org/
# and the kernel MPPE module available from the CVS repository also on
# http://ppp.samba.org/, which is packaged for DKMS as kernel_ppp_mppe.
###############################################################################

# Lock the port
lock

# Authentication
# We don't need the tunnel server to authenticate itself
noauth

# We won't do PAP, EAP, CHAP, or MSCHAP, but we will accept MSCHAP-V2
# (you may need to remove these refusals if the server is not using MPPE)
refuse-pap
refuse-eap
refuse-chap
refuse-mschap

# Compression
# Turn off compression protocols we know won't be used
nobsdcomp
nodeflate

# Encryption
# (There have been multiple versions of PPP with encryption support,
# choose with of the following sections you will use.  Note that MPPE
# requires the use of MSCHAP-V2 during authentication)

# http://ppp.samba.org/ the PPP project version of PPP by Paul Mackarras
# ppp-2.4.2 or later with MPPE only, kernel module ppp_mppe.o
# {{{
# Require MPPE 128-bit encryption
#require-mppe-128
# }}}

# http://polbox.com/h/hs001/ fork from PPP project by Jan Dubiec
# ppp-2.4.2 or later with MPPE and MPPC, kernel module ppp_mppe_mppc.o
# {{{
# Require MPPE 128-bit encryption
mppe required,stateless
# }}}