用RedHat6 (64bit)架設vpn,無法正常連入 - Linux

各位前輩大家好

最近小弟在使用RedHat6 (64bit)架設vpn的時候,碰到一個問題
參考了很多網路上的文章,用了一整天還是不知道該怎麼樣來解決...
想請教一下各位前輩關於這個部份,應該要來怎麼解決呢....
在勞煩各位前輩 幫忙解惑了

在架設的部份
系統版本：Red Hat Enterprise Linux Server release 6.2

小弟所使用的軟體版本是
ppp-2.4.5-5.el6.x86_64
pptpd-1.3.4-2.el6.x86_64.rpm

架設的文件是參考網路上安裝的文件進行安裝
在安裝的過程之中,沒有出現特別的Error的訊息

可是用Ubuntu或 windows 就是連不上
後來我去查了一下/var/log/messages
(為了先前有鄉民前輩提供除錯的方法,所以在/etc/ppp/options 有另外再加上 debug 和 dump）
可是還是不知道問題出在哪...Orz

系統紀錄的訊息如下
=========================================================================
pptpd[3408]: MGR: Maximum of 100 connections reduced to 41, not enough
IP addresses given
pptpd[3410]: MGR: Manager process started
pptpd[3410]: MGR: Maximum of 41 connections available
pptpd[3413]: CTRL: Client 114.34.10.22 control connection started
pptpd[3413]: CTRL: Starting call (launching pppd, opening GRE)
pppd[3415]: Plugin /usr/lib64/pptpd/pptpd-logwtmp.so loaded.
pppd[3415]: pptpd-logwtmp: $Version$
pppd[3415]: pppd options in effect:
pppd[3415]: debug#011#011# (from /etc/ppp/options)
pppd[3415]: nologfd#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: dump#011#011# (from /etc/ppp/options)
pppd[3415]: plugin /usr/lib64/pptpd/pptpd-logwtmp.so#011#011#
(from command line)
pppd[3415]: require-mschap-v2#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: refuse-pap#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: refuse-chap#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: refuse-mschap#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: name pptpd#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: pptpd-original-ip 114.34.10.22#011#011# (from command line)
pppd[3415]: 115200#011#011# (from command line)
pppd[3415]: lock#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: local#011#011# (from command line)
pppd[3415]: novj#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: novjccomp#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: ipparam 114.34.10.22#011#011# (from command line)
pppd[3415]: ms-dns xxx # [don't know how to print value]#011#011#
(from /etc/ppp/options.pptpd)
pppd[3415]: proxyarp#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: 192.168.2.1:192.168.2.10#011#011# (from command line)
pppd[3415]: nobsdcomp#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: require-mppe-128#011#011# (from /etc/ppp/options.pptpd)
pppd[3415]: pppd 2.4.5 started by root, uid 0
pppd[3415]: Using interface ppp0
pppd[3415]: Connect: ppp0 <--> /dev/pts/1
pppd[3415]: Modem hangup
pppd[3415]: Connection terminated.
kernel: libfcoe_device_notification: NETDEV_UNREGISTER ppp0
pppd[3415]: Exit.
pptpd[3413]: CTRL: Client 114.34.10.22 control connection finished
=========================================================================

但是實在是不知道問題是出在哪
相關的設定文件如下：
/etc/ppp/options.pptpd
===================================
name pptpd
refuse-pap
refuse-chap
refuse-mschap
require-mschap-v2
require-mppe-128
proxyarp
lock
nobsdcomp
novj
novjccomp
nologfd
ms-dns 168.95.1.1
ms-dns 8.8.8.8
====================================

/etc/pptpd.conf
====================================
option /etc/ppp/options.pptpd
logwtmp
localip 192.168.2.1
remoteip 192.168.2.10-50
====================================

/etc/sysctl.conf
net.ipv4.ip_forward = 0 改成 net.ipv4.ip_forward = 1

--