设置：
运行 OpenVPN 服务器和一些 Vagrant 虚拟机的盒子
问题：
我希望像常规机器一样直接从 VPN 客户端访问 Vagrant 盒，而不是仅仅通过几个转发端口。
配置：
OpenVPN 有接口 tun0：
tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:10.69.69.1 P-t-P:10.69.69.2 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:110348 errors:0 dropped:0 overruns:0 frame:0
TX packets:89923 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:18322866 (18.3 MB) TX bytes:16651955 (16.6 MB)
Vagrant 配置了具有特定 ip 的 public_networks：
config.vm.network "public_network", :bridge => "tun0", ip:"10.69.69.101", :auto_config => "false", :netmask => "255.255.255.0"
但它不起作用，我猜是因为我无法将 Vagrant 桥接到 OpenVpn 接口？从日志中：
DEBUG network: Normalized configuration: {:auto_config=>"false", :bridge=>"tun0", :mac=>nil, :nic_type=>nil, :use_dhcp_assigned_default_route=>false, :ip=>"10.69.69.101", :netmask=>"255.255.255.0", :protocol=>"tcp", :id=>"9d8e9f11-8e10-442d-92a3-7c463e14cf24", :adapter=>2}
INFO subprocess: Starting process: ["/usr/bin/VBoxManage", "list", "bridgedifs"]
DEBUG subprocess: Selecting on IO
DEBUG subprocess: stdout: Name: eth0
GUID: 30687465-0000-4000-8000-d43d7ee2ff6e
DHCP: Disabled
IPAddress: XXX.XXX.XXX.XXX
NetworkMask: 255.255.255.224
IPV6Address: 2a01:04f8:0200:6152:0000:0000:0000:0002
IPV6NetworkMaskPrefixLength: 64
HardwareAddress: d4:3d:7e:e2:ff:6e
MediumType: Ethernet
Status: Up
VBoxNetworkName: HostInterfaceNetworking-eth0
DEBUG subprocess: Waiting for process to exit. Remaining to timeout: 32000
DEBUG subprocess: Exit status: 0
DEBUG network: Bridge was directly specified in config, searching for: tun0
INFO interface: info: Specific bridge 'tun0' not found. You may be asked to specify
which network to bridge to.
[default] Specific bridge 'tun0' not found. You may be asked to specify
which network to bridge to.
DEBUG network: Only one bridged interface available. Using it by default.
INFO network: Bridging adapter 2 to eth0
DEBUG network: Adapter configuration: {:adapter=>2, :type=>:bridged, :bridge=>"eth0", :mac_address=>nil, :nic_type=>nil}
我是否应该通过 Virtualbox 桥接 tun0？或者这不可行？我尝试过这样做：
v.customize ["modifyvm", :id, "--nic1", "bridged", "--bridgeadapter1", "tun0"]
我是否应该创建一个虚拟接口 eth1（我不能使用 bridge0，因为它是一个公共 IP），并通过 Vagrant 桥接到它，然后为 OpenVPN 服务器创建路由规则？