使用 OpenSwan 和 XL2TPD 的 L2TP over IPSec VPN 无法连接,在 Centos 6 上超时

使用 OpenSwan 和 XL2TPD 的 L2TP over IPSec VPN 无法连接,在 Centos 6 上超时

我正在全新安装的 Centos 6.3 上通过 IPSec 设置 LT2p。

我已经刷新了 iptables,允许全部。

每当我尝试连接时,我都会收到“VPN 没有回复”的消息,并且

这是我的 ipsec.conf 文件(服务器是 1.2.3.4):

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=1.2.3.4
    leftprotoport=17/1701
    right=%any
    rightprotoport=17/%any

我的 /etc/ipsec.secrets

1.2.3.4 %any: PSK "password"

我的 sysctl.conf(附加行)

net.ipv4.ip_forward = 1
net.ipv4.conf.default.rp_filter = 0
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
net.ipv4.conf.all.log_martians = 0
net.ipv4.conf.default.log_martians = 0
net.ipv4.conf.default.accept_source_route = 0
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.icmp_ignore_bogus_error_responses = 1

以下是“ipsec verify”的结果:

# 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/K2.6.32-279.19.1.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                               [WARNING]
Checking for 'iptables' command                                 [OK]
Opportunistic Encryption Support                                [DISABLED]

我看到 xl2tpd 正在监听 1701/udp:

udp        0      0 1.2.3.4:1701     0.0.0.0:*     2096/xl2tpd 

答案1

检查您的网络是否正常工作,发送和接收数据包的数据速率是否也有响应,有时由于连接丢失或其他问题会导致此问题。

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