以下是本人在Debian lenny上配置L2TP VPN的记录,你可完全参考,只需修改IP:173.255.200.20为你的IP地址即可。
一:安装配置openswan
听说debian lenny源中的openswan有问题,只有安装2.6.24版才能正常使用。
apt-get install openswan
apt-get install libgmp3-dev gawk flex bison
wget http://www.openswan.org/download/openswan-2.6.24.tar.gz
tar xf openswan-2.6.24.tar.gz
cd openswan-2.6.24
make programs
make install
apt-get install openswan安装出现提示时一直按回车就OK了,记住。
编辑:/etc/ipsec.conf,内容如下(注意缩进):
version 2.0
config setup
nat_traversal=yes
virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12
oe=off
protostack=netkey
conn L2TP-PSK-NAT
rightsubnet=vhost:%priv
also=L2TP-PSK-noNAT
conn L2TP-PSK-noNAT
authby=secret
pfs=no
auto=add
keyingtries=3
rekey=no
ikelifetime=8h
keylife=1h
type=transport
left=173.255.200.20
leftid=173.255.200.20
leftprotoport=17/1701
right=%any
rightid=%any
rightprotoport=17/%any
编辑:/etc/ipsec.secrets,设置加密字段(预共享密钥),内容如下:
173.255.200.20 %any: PSK "humounet"
修改:/etc/sysctl.conf,与openvpn一致,见/blog/201101011221.html
内容为:
#net.ipv6.conf.all.forwarding = 1
net.ipv4.ip_forward = 1
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
使其生效:
sysctl -p
设置iptables包转发,与openvpn一致,参见/blog/201101011221.html
iptables -t nat -A POSTROUTING -s 10.168.0.0/16 -o eth0 -j MASQUERADE
重启ipsec,验证是否配置成功:
/etc/init.d/ipsec restart
ipsec verify
出现以下显示则为成功:
Checking your system to see if IPsec got installed and started correctly:
Version check and ipsec on-path [OK]
Linux Openswan U2.6.24/K2.6.32.16-linode28 (netkey)
Checking for IPsec support in kernel [OK]
NETKEY detected, testing for disabled ICMP send_redirects [OK]
NETKEY detected, testing for disabled ICMP accept_redirects [OK]
Checking for RSA private key (/etc/ipsec.secrets) [OK]
Checking that pluto is running [OK]
Pluto listening for IKE on udp 500 [OK]
Pluto listening for NAT-T on udp 4500 [OK]
Two or more interfaces found, checking IP forwarding [OK]
Checking NAT and MASQUERADEing
Checking for 'ip' command [OK]
Checking for 'iptables' command [OK]
Opportunistic Encryption Support [DISABLED]
二:安装配置l2tpd:
apt-get install xl2tpd
编辑:/etc/xl2tpd/xl2tpd.conf,内容如下:
[global]
port = 1701
listen-addr = 173.255.200.20;
ipsec saref = yes
[lns default]
ip range = 10.168.2.5-10.168.2.254
local ip = 10.168.2.1
;require chap = yes
refuse chap = yes
refuse pap = yes
require authentication = yes
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes
编辑:/etc/ppp/options.xl2tpd,内容如下:
require-mschap-v2
ms-dns 8.8.8.8
ms-dns 8.8.4.4
asyncmap 0
auth
crtscts
lock
hide-password
modem
debug
name l2tpd
proxyarp
mtu 1410
mru 1410
nodefaultroute
lcp-echo-interval 30
lcp-echo-failure 6
#idle 1800
connect-delay 10000
三:配置访问访问用户
编辑:/etc/ppp/chap-secrets,内容如下例:
# user server password ip
用户一 * 密码 *
用户二 * 密码 *
重启l2tpd:
/etc/init.d/xl2tpd restart
OK!
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