通过 OpenVPN 路由所有流量

Question

是的，这个问题已经问了一百遍了，到处找了也没有用。

标题说明了一切。

我有一个 OpenVPN 服务器（在 ubuntu 上），我可以通过我的客户端（Windows 8）连接到它......

当我尝试通过 VPN 路由所有流量时，问题就开始了。

我push在 server.conf 中添加了标志：

push "redirect-gateway def1"
push "dhcp-option DNS 8.8.8.8"

当我从客户端连接时，客户端输出：

Wed May 07 21:38:40 2014 SENT CONTROL [StretchVPN-CA]: 'PUSH_REQUEST' (status=1)
Wed May 07 21:38:41 2014 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1,dhcp-option DNS 8.8.8.8,route-gateway <Remote Router IP>,ping 10,ping-restart 120,ifconfig 192.168.0.201 255.255.255.0'
Wed May 07 21:38:41 2014 OPTIONS IMPORT: timers and/or timeouts modified
Wed May 07 21:38:41 2014 OPTIONS IMPORT: --ifconfig/up options modified
Wed May 07 21:38:41 2014 OPTIONS IMPORT: route options modified
Wed May 07 21:38:41 2014 OPTIONS IMPORT: route-related options modified
Wed May 07 21:38:41 2014 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Wed May 07 21:38:41 2014 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Wed May 07 21:38:41 2014 open_tun, tt->ipv6=0
Wed May 07 21:38:41 2014 TAP-WIN32 device [Local Area Connection 4] opened: \\.\Global\{1F145805-92FC-454E-8FD9-0A6017DD4AD1}.tap
Wed May 07 21:38:41 2014 TAP-Windows Driver Version 9.9
Wed May 07 21:38:41 2014 Notified TAP-Windows driver to set a DHCP IP/netmask of 192.168.0.201/255.255.255.0 on interface {1F145805-92FC-454E-8FD9-0A6017DD4AD1} [DHCP-serv: 192.168.0.0, lease-time: 31536000]
Wed May 07 21:38:41 2014 Successful ARP Flush on interface [35] {1F145805-92FC-454E-8FD9-0A6017DD4AD1}
Wed May 07 21:38:46 2014 TEST ROUTES: 1/1 succeeded len=0 ret=1 a=0 u/d=up
Wed May 07 21:38:46 2014 C:\WINDOWS\system32\route.exe ADD <Remote Router IP> MASK 255.255.255.255 172.20.10.1
Wed May 07 21:38:46 2014 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=25 and dwForwardType=4
Wed May 07 21:38:46 2014 Route addition via IPAPI succeeded [adaptive]
Wed May 07 21:38:46 2014 C:\WINDOWS\system32\route.exe ADD 0.0.0.0 MASK 128.0.0.0 192.168.0.3
Wed May 07 21:38:46 2014 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=30 and dwForwardType=4
Wed May 07 21:38:46 2014 Route addition via IPAPI succeeded [adaptive]
Wed May 07 21:38:46 2014 C:\WINDOWS\system32\route.exe ADD 128.0.0.0 MASK 128.0.0.0 192.168.0.3
Wed May 07 21:38:46 2014 ROUTE: CreateIpForwardEntry succeeded with dwForwardMetric1=30 and dwForwardType=4
Wed May 07 21:38:46 2014 Route addition via IPAPI succeeded [adaptive]
Wed May 07 21:38:46 2014 Initialization Sequence Completed

打开连接时，我尝试在客户端使用标志：

openvpn --config "C:\Program Files\OpenVPN\config\client.ovpn" --redirect-gateway def1 --route-method exe

但是，当我去 whatsmyip.org 时，它仍然说我的客户 ip。

有没有人遇到过这个问题并设法解决了它？

非常感谢

Answer 1

我已经使用 OpenVPN 服务器对此进行了测试，并且redirect-gateway def1在客户端和服务器配置中设置该选项工作正常。

当我访问whatismyip.org 时，我会看到我的 OpenVPN 服务器的 IP。

以下是我使用的客户端配置：

client
dev tun
proto udp
# THE IP OF THE REMOTE OPENVPN SERVER:
remote ip_address port
resolv-retry infinite
nobind
persist-key
persist-tun
# THE CSR FILE:
pkcs12 certificate.p12
ns-cert-type server
cipher AES-256-CBC
comp-lzo
redirect-gateway def1
verb 3

我还对 openvpn 命令附加了重定向网关 def1 选项进行了测试，并获得了相同的结果。服务器配置是：

port 1194
proto udp
dev tun

dh /etc/openvpn/easy-rsa/keys/dh1024.pem
ca /etc/openvpn/easy-rsa/keys/ca.crt
# ENSURE THE DOMAIN NAME/FILENAME IS CORRECT:
cert /etc/openvpn/easy-rsa/keys/cert.crt
key /etc/openvpn/easy-rsa/keys/cert.key

server 10.5.3.0  255.255.255.0
# YOUR LOCAL SERVER IP HERE:
client-config-dir ccd
route 10.5.3.0 255.255.255.0
ifconfig-pool-persist ipp.txt
cipher AES-256-CBC
comp-lzo
persist-key
persist-tun

status log/openvpn-status.log 5
status-version 2
log-append log/openvpn.log
verb 3  # verbose mode
management localhost port /etc/openvpn/management-password

# ROUTE THE CLIENT'S INTERNET ACCESS THROUGH THIS SERVER:
push "redirect-gateway def1"
push "remote-gateway vpn_server_ip"
push "dhcp-option DNS 8.8.8.8"
keepalive 10 60

Answer 2

也许您忘记修改您的 NAT？以 root 身份运行这 3 个命令

命令：

iptables -I FORWARD -i tun0 -o eth0 \
         -s 10.8.0.0/24 -m conntrack --ctstate NEW -j ACCEPT

iptables -I FORWARD -m conntrack --ctstate RELATED,ESTABLISHED \
         -j ACCEPT

iptables -t nat -I POSTROUTING -o eth0 \
          -s 10.8.0.0/24 -j MASQUERADE

标题：

• tun0：你的虚拟 VPN 网卡
• eth0：你的普通网卡
• 10.8.0.0：您的 VPN 网络 IP 块