l2tp是中Internet隧道协议，通过对l2tp的设置能够实现系统的联网，那么在Fedora 17系统下，要如何通过l2tp vpn来实现上网呢？其实很简单，随小编一起来学习下吧。
1.安装l2tpd
sudo yum install l2tpd
2.配置文件
/etc/xl2tpd/xl2tpd.conf
port = 1701 ; * Bind to port 1701
access control = yes ; * Refuse connections without IP match
rand source = dev ; Source for entropy for random
［lac zju］
lns = 10.5.1.9 ; * Who is our LNS？
redial = yes ; * Redial if disconnected？
redial timeout = 3 ; * Wait n seconds between redials
max redials = 999 ; * Give up after n consecutive failures
require chap = yes ; * Require CHAP auth. by peer
refuse pap = yes ; * Refuse PAP authentication
require authentication = yes ; * Require peer to authenticate
ppp debug = no ; * Turn on PPP debugging
pppoptfile = /etc/xl2tpd/options ; * ppp options file for this lac
name = USERNAME@SERVICE_TYPE
［img］［/img］
/etc/ppp/chap-secrets
USERNAME@SERVICE_TYPE * PASSWORD *
3.启动xl2tpd
sudo service start xl2tpd
或者
sudo /etc/rc.d/init.d/xl2tpd start
4.连接
sudo echo “d zju”》/var/run/xl2tpd/l2tp-control
#这里的zju要和配置文件中的的lac 后面的字节一样
5.查看是否连接
ip addr show | grep ‘inet.*ppp’
有输出就是连接上了
6.设置路由
ip route add default dev ppp0
7.断开
sudo echo “d zju”》/var/run/xl2tpd/l2tp-control
走自己的路，让别人说去吧
