这http://openvpn.net/index.php/open-source/documentation/howto.html页面显示错误是由于：“此错误表明客户端无法与服务器建立网络连接。” 但我认为这里的情况并非如此。
这是我的配置：OpenVPN 服务器已安装在 Windows 2008 上，具有 10 个有效 IP 地址。我可以从外部 ping OpenVPN IP 地址，而且服务器上没有安装防火墙来阻止端口。
OpenVPN Server Configuration:
local 96.31.90.174
port 1937
proto tcp
dev tun
ca ca.crt
cert server.crt
key server.key
dh dh1024.pem
ifconfig-pool-persist ipp.txt
keepalive 10 120
comp-lzo
persist-key
persist-tun
status openvpn-status.log
verb 3
OpenVPN 客户端配置：我已经在没有防火墙的 Windows 7 上安装了它。
client
dev tun
proto tcp
remote 96.31.90.174 1937
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client1.crt
key client1.key
ns-cert-type server
comp-lzo
verb 3
以下是客户端日志：
Tue Dec 08 23:42:06 2009 LZO compression initialized
Tue Dec 08 23:42:06 2009 Control Channel MTU parms [ L:1544 D:140 EF:40 EB:0 ET:
0 EL:0 ]
Tue Dec 08 23:42:06 2009 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:135 ET:
0 EL:0 AF:3/1 ]
Tue Dec 08 23:42:06 2009 Local Options hash (VER=V4): '69109d17'
Tue Dec 08 23:42:06 2009 Expected Remote Options hash (VER=V4): 'c0103fa8'
Tue Dec 08 23:42:06 2009 Attempting to establish TCP connection with 96.31.90.17
4:1937
Tue Dec 08 23:42:06 2009 TCP connection established with 96.31.90.174:1937
Tue Dec 08 23:42:06 2009 Socket Buffers: R=[8192->8192] S=[8192->8192]
Tue Dec 08 23:42:06 2009 TCPv4_CLIENT link local: [undef]
Tue Dec 08 23:42:06 2009 TCPv4_CLIENT link remote: 96.31.90.174:1937
Tue Dec 08 23:42:08 2009 TLS: Initial packet from 96.31.90.174:1937, sid=fdc04dc
5 451dd470
Tue Dec 08 23:43:06 2009 TLS Error: TLS key negotiation failed to occur within 6
0 seconds (check your network connectivity)
Tue Dec 08 23:43:06 2009 TLS Error: TLS handshake failed
Tue Dec 08 23:43:06 2009 Fatal TLS error (check_tls_errors_co), restarting
Tue Dec 08 23:43:06 2009 TCP/UDP: Closing socket
Tue Dec 08 23:43:06 2009 SIGUSR1[soft,tls-error] received, process restarting
Tue Dec 08 23:43:06 2009 Restart pause, 5 second(s)
以下是服务器日志：
Tue Dec 08 15:26:13 2009 ROUTE default_gateway=96.31.90.129
Tue Dec 08 15:26:13 2009 TAP-WIN32 device [Local Area Connection 2] opened: \\.\
Global\{0602F6D1-2000-4C16-B681-3E9FEFE3200D}.tap
Tue Dec 08 15:26:13 2009 TAP-Win32 Driver Version 9.6
Tue Dec 08 15:26:13 2009 TAP-Win32 MTU=1500
Tue Dec 08 15:26:13 2009 Notified TAP-Win32 driver to set a DHCP IP/netmask of 1
0.8.0.1/255.255.255.252 on interface {0602F6D1-2000-4C16-B681-3E9FEFE3200D} [DHC
P-serv: 10.8.0.2, lease-time: 31536000]
Tue Dec 08 15:26:13 2009 Sleeping for 10 seconds...
Tue Dec 08 15:26:23 2009 Successful ARP Flush on interface [21] {0602F6D1-2000-4
C16-B681-3E9FEFE3200D}
Tue Dec 08 15:26:24 2009 C:\WINDOWS\system32\route.exe ADD 10.8.0.0 MASK 255.255
.255.0 10.8.0.2
Tue Dec 08 15:26:24 2009 ROUTE: route addition failed using CreateIpForwardEntry
: The object already exists. [status=5010 if_index=21]
Tue Dec 08 15:26:24 2009 Route addition via IPAPI failed [adaptive]
Tue Dec 08 15:26:24 2009 Route addition fallback to route.exe
The route addition failed: The object already exists.
Tue Dec 08 15:26:24 2009 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:135 ET:
0 EL:0 AF:3/1 ]
Tue Dec 08 15:26:24 2009 Listening for incoming TCP connection on 96.31.90.174:1
937
Tue Dec 08 15:26:24 2009 Socket Buffers: R=[8192->8192] S=[8192->8192]
Tue Dec 08 15:26:24 2009 TCPv4_SERVER link local (bound): 96.31.90.174:1937
Tue Dec 08 15:26:24 2009 TCPv4_SERVER link remote: [undef]
Tue Dec 08 15:26:25 2009 MULTI: multi_init called, r=256 v=256
Tue Dec 08 15:26:25 2009 IFCONFIG POOL: base=10.8.0.4 size=62
Tue Dec 08 15:26:25 2009 IFCONFIG POOL LIST
Tue Dec 08 15:26:25 2009 MULTI: TCP INIT maxclients=60 maxevents=64
Tue Dec 08 15:26:25 2009 Initialization Sequence Completed
Tue Dec 08 15:26:33 2009 MULTI: multi_create_instance called
Tue Dec 08 15:26:33 2009 Re-using SSL/TLS context
Tue Dec 08 15:26:33 2009 LZO compression initialized
Tue Dec 08 15:26:33 2009 Control Channel MTU parms [ L:1544 D:140 EF:40 EB:0 ET:
0 EL:0 ]
Tue Dec 08 15:26:34 2009 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:135 ET:
0 EL:0 AF:3/1 ]
Tue Dec 08 15:26:34 2009 Local Options hash (VER=V4): 'c0103fa8'
Tue Dec 08 15:26:34 2009 Expected Remote Options hash (VER=V4): '69109d17'
Tue Dec 08 15:26:34 2009 TCP connection established with 62.220.113.29:56336
Tue Dec 08 15:26:34 2009 Socket Buffers: R=[8192->8192] S=[8192->8192]
Tue Dec 08 15:26:34 2009 TCPv4_SERVER link local: [undef]
Tue Dec 08 15:26:34 2009 TCPv4_SERVER link remote: 62.220.113.29:56336
Tue Dec 08 15:26:34 2009 62.220.113.29:56336 TLS: Initial packet from 62.220.113
.29:56336, sid=fa280cbb 89e9998b
Tue Dec 08 15:26:38 2009 MULTI: multi_create_instance called
Tue Dec 08 15:26:38 2009 Re-using SSL/TLS context
Tue Dec 08 15:26:38 2009 LZO compression initialized
Tue Dec 08 15:26:38 2009 Control Channel MTU parms [ L:1544 D:140 EF:40 EB:0 ET:
0 EL:0 ]
Tue Dec 08 15:26:39 2009 Data Channel MTU parms [ L:1544 D:1450 EF:44 EB:135 ET:
0 EL:0 AF:3/1 ]
Tue Dec 08 15:26:39 2009 Local Options hash (VER=V4): 'c0103fa8'
Tue Dec 08 15:26:39 2009 Expected Remote Options hash (VER=V4): '69109d17'
Tue Dec 08 15:26:39 2009 TCP connection established with 81.91.158.242:62068
Tue Dec 08 15:26:39 2009 Socket Buffers: R=[8192->8192] S=[8192->8192]
Tue Dec 08 15:26:39 2009 TCPv4_SERVER link local: [undef]
Tue Dec 08 15:26:39 2009 TCPv4_SERVER link remote: 81.91.158.242:62068
Tue Dec 08 15:26:39 2009 81.91.158.242:62068 TLS: Initial packet from 81.91.158.
242:62068, sid=cc8b77bc 966250fd
Tue Dec 08 15:27:34 2009 62.220.113.29:56336 TLS Error: TLS key negotiation fail
ed to occur within 60 seconds (check your network connectivity)
Tue Dec 08 15:27:34 2009 62.220.113.29:56336 TLS Error: TLS handshake failed
Tue Dec 08 15:27:34 2009 62.220.113.29:56336 Fatal TLS error (check_tls_errors_c
o), restarting
Tue Dec 08 15:27:34 2009 62.220.113.29:56336 SIGUSR1[soft,tls-error] received, c
lient-instance restarting
Tue Dec 08 15:27:34 2009 TCP/UDP: Closing socket
Tue Dec 08 15:27:39 2009 81.91.158.242:62068 TLS Error: TLS key negotiation fail
ed to occur within 60 seconds (check your network connectivity)
Tue Dec 08 15:27:39 2009 81.91.158.242:62068 TLS Error: TLS handshake failed
Tue Dec 08 15:27:39 2009 81.91.158.242:62068 Fatal TLS error (check_tls_errors_c
o), restarting
Tue Dec 08 15:27:39 2009 81.91.158.242:62068 SIGUSR1[soft,tls-error] received, c
lient-instance restarting
Tue Dec 08 15:27:40 2009 TCP/UDP: Closing socket
答案1
您的客户端配置中指定了端口 1937，但服务器配置中指定了服务器监听的端口 1194。话虽如此，您的服务器日志显示它正在监听端口 1937，至少在您记录日志时是这样的。除此之外，我觉得没什么不对劲。
看起来客户端和服务器之间的 TCP 连接确实良好。为了排除任何 PKI 问题，我首先要静态密钥配置一旦成功，就转到公钥配置。
答案2
您可以先检查以下几件事：
- 它们是否已由你的 CA 签署？
- 您指定了“ns-cert-type server”选项。您是否使用此选项生成了服务器证书？
- 你可以使用更详细的信息（动词 4-9），以便获得有关失败的更多信息
答案3
几天前我也遇到过同样的问题，我解决了这个问题。我将客户端的 *.csr 文件与证书和密钥一起添加到客户端包中，一切正常。