l2tpipsec vpn 安装配置详解 nginx

1首先安装必备依赖包
#rpm -ivh *.rpm
# yum install xl2tpd openswan ppp
yum install make gcc gmp-devel
安装Openswan
yum install opemswan
编辑配置文件/etc/ipsec.conf
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=**.*.*.*     //这是外网IP地址
    leftprotoport=17/1701
    right=%any
    rightprotoport=17/%any
设置共享密钥PSK 编辑配置文件/etc/ipsec.secrets
*.*.*.*   %any: PSK “密钥”

调整网络策略
# vim /etc/sysctl.conf
net.ipv4.ip_forward = 1

开启转发
    # vim /etc/ipsec.d/net.sh //加入以下内空
    for each in /proc/sys/net/ipv4/conf/*
    do
    echo 0 > $each/accept_redirects
    echo 0 > $each/send_redirects
    done

    # chmod +x /etc/ipsec.d/net.sh
    # sh /etc/ipsec.d/net.sh



启动ipsec，并验证
    [root@network ipv4]# /etc/init.d/ipsec start

    [root@network ipv4]# ipsec verify
    Checking your system to see if IPsec got installed and started correctly:
    Version check and ipsec on-path                                 [OK]
    Linux Openswan U2.6.32/K2.6.32-431.el6.x86_64 (netkey)
    Checking for IPsec support in kernel                            [OK]
     SAref kernel support                                           [N/A]
     NETKEY: Testing for disabled ICMP send_redirects              [OK]
    NETKEY detected, testing for disabled ICMP accept_redirects     [OK]
    Checking that pluto is running                                  [OK]
     Pluto listening for IKE on udp 500                             [OK]
     Pluto listening for NAT-T on udp 4500                          [OK]
    Checking for 'ip' command                                       [OK]
    Checking /bin/sh is not /bin/dash                               [OK]
    Checking for 'iptables' command                                 [OK]
    Opportunistic Encryption Support                                [DISABLED]

ipsec verify如果没有出现failed，就说明ipsec安装成功了。

配置xl2tpd
[root@network ipv4]# cat /etc/xl2tpd/xl2tpd.conf
[global]
ipsec saref = no

[lns default]
local ip = 192.168.10.202             //服务端IP，
ip range = 192.168.0.128-192.168.0.254   //客户端IP段
refuse chap = yes
refuse pap = yes
require authentication = yes
ppp debug = yes
pppoptfile = /etc/ppp/options.xl2tpd
length bit = yes

[root@network ipv4]# /etc/init.d/xl2tpd start //启动

配置ppp
配置options.xl2tpd
    [root@network ipv4]# cat /etc/ppp/options.xl2tpd
    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
    lcp-echo-interval 30
    lcp-echo-failure 4



添加VPN用户
   # cat >>/etc/ppp/chap-secrets<<EOF
   > vpnuser * 111111 *
   > EOF



配置iptables snet
    # iptables -t nat -I POSTROUTING 1 -j SNAT -s 192.168.0.0/24 --to 192.168.10.202
    # iptables-save


   启动各项服务即可




系统日志出现Cannot determine ethernet address for proxy ARP     这个一定是转发规则有问题

l2tpipsec vpn 安装配置详解 nginx

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