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Running client and app using connection in different VMs?

https://forums.openvpn.net/viewtopic.php?t=12811

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Running client and app using connection in different VMs?

Posted: Sat May 04, 2013 10:05 am
by Magnitude
I want to run the OpenVPN client in one VirtualBox VM and use the tunnel provided by the client from another VM. The reason for this is that while running software acceptance tests I don't want to run the OpenVPN client on the same VM where the program using the VPN tunnel is running.

VirtualBox host OS is Windows Server 2003 or Win7. Guest OS is Server 2003 or WinXP.

How can i do this?

Re: Running client and app using connection in different VMs

Posted: Mon May 06, 2013 12:59 pm
by janjust
This is definitely possible, but VirtualBox is notorious when it comes to routing between two VMs.
Set up openvpn in routed mode (mode tun) and set up routing in that VM; then set up the second VM and give it the first VM as the default gateway. After that, it is all a matter of routing ;)

Re: Running client and app using connection in different VMs

Posted: Mon May 06, 2013 5:08 pm
by Magnitude
Could you please show me in a little more detail how to do that? (I am a C# programmer and never had to mess around with routing and networking stuff, so my networking skills are somewhat limited, to say the least)

Re: Running client and app using connection in different VMs

Posted: Wed May 22, 2013 8:27 pm
by Magnitude
Set up openvpn in routed mode (mode tun) and set up routing in that VM; then set up the second VM and give it the first VM as the default gateway. After that, it is all a matter of routing
I have tried, but can't make it work. I am stuck and would really appreciate some help on this. :?

I have two VirtualBox VM's with network set to bridged adapter.

First VM (IP 10.0.0.8):

I started OpenVPN in this VM and logged in on vpnbook free using the following ovpn file (just for testing, I will eventually use other provider):

Code: Select all

client
dev tun0
proto udp
remote 93.115.84.194 53
remote euro1.vpnbook.com 53
resolv-retry infinite
nobind
persist-key
persist-tun
ca vpnbook-ca.crt
auth-user-pass
comp-lzo
verb 3
cipher AES-128-CBC
fast-io
pull
route-delay 2
redirect-gateway
The OpenVPN sign-on produced this output (DNS Server IP's have been hidden):

Code: Select all

Wed May 22 16:29:59 2013 OpenVPN 2.3.1 i686-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [eurephia] [IPv6] built on Mar 28 2013
Wed May 22 16:29:59 2013 WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.
Wed May 22 16:29:59 2013 NOTE: OpenVPN 2.1 requires '--script-security 2' or higher to call user-defined scripts or executables
Wed May 22 16:29:59 2013 NOTE: --fast-io is disabled since we are running on Windows
Wed May 22 16:29:59 2013 Socket Buffers: R=[8192->8192] S=[8192->8192]
Wed May 22 16:29:59 2013 UDPv4 link local: [undef]
Wed May 22 16:29:59 2013 UDPv4 link remote: [AF_INET]93.115.84.194:53
Wed May 22 16:29:59 2013 TLS: Initial packet from [AF_INET]93.115.84.194:53, sid=6e77f58d 5e571031
Wed May 22 16:29:59 2013 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Wed May 22 16:30:00 2013 VERIFY OK: depth=1, C=CH, ST=Zurich, L=Zurich, O=vpnbook.com, OU=IT, CN=vpnbook.com, name=vpnbook.com, emailAddress=admin@vpnbook.com
Wed May 22 16:30:00 2013 VERIFY OK: depth=0, C=CH, ST=Zurich, L=Zurich, O=vpnbook.com, OU=IT, CN=vpnbook.com, name=vpnbook.com, emailAddress=admin@vpnbook.com
Wed May 22 16:30:00 2013 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Wed May 22 16:30:00 2013 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed May 22 16:30:00 2013 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Wed May 22 16:30:00 2013 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed May 22 16:30:00 2013 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
Wed May 22 16:30:00 2013 [vpnbook.com] Peer Connection Initiated with [AF_INET]93.115.84.194:53
Wed May 22 16:30:03 2013 SENT CONTROL [vpnbook.com]: 'PUSH_REQUEST' (status=1)
Wed May 22 16:30:03 2013 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1,dhcp-option DNS  1.2.3.4,dhcp-option DNS  1.2.3.5,route 10.8.0.1,topology net30,ping 5,ping-restart 30,ifconfig 10.8.0.130 10.8.0.129'
Wed May 22 16:30:03 2013 OPTIONS IMPORT: timers and/or timeouts modified
Wed May 22 16:30:03 2013 OPTIONS IMPORT: --ifconfig/up options modified
Wed May 22 16:30:03 2013 OPTIONS IMPORT: route options modified
Wed May 22 16:30:03 2013 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified
Wed May 22 16:30:03 2013 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0
Wed May 22 16:30:03 2013 open_tun, tt->ipv6=0
Wed May 22 16:30:03 2013 TAP-WIN32 device [Local Area Connection 2] opened: \\.\Global\{A171C600-6DAB-4CF7-83E3-EBF6CEF6A36D}.tap
Wed May 22 16:30:03 2013 TAP-Windows Driver Version 9.9
Wed May 22 16:30:03 2013 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.8.0.130/255.255.255.252 on interface {A171C600-6DAB-4CF7-83E3-EBF6CEF6A36D} [DHCP-serv: 10.8.0.129, lease-time: 31536000]
Wed May 22 16:30:03 2013 Successful ARP Flush on interface [3] {A171C600-6DAB-4CF7-83E3-EBF6CEF6A36D}
Wed May 22 16:30:05 2013 TEST ROUTES: 0/0 succeeded len=1 ret=0 a=0 u/d=down
Wed May 22 16:30:05 2013 Route: Waiting for TUN/TAP interface to come up...
Wed May 22 16:30:07 2013 TEST ROUTES: 0/0 succeeded len=1 ret=0 a=0 u/d=down
Wed May 22 16:30:07 2013 Route: Waiting for TUN/TAP interface to come up...
Wed May 22 16:30:08 2013 TEST ROUTES: 0/0 succeeded len=1 ret=0 a=0 u/d=down
Wed May 22 16:30:08 2013 Route: Waiting for TUN/TAP interface to come up...
Wed May 22 16:30:09 2013 TEST ROUTES: 2/2 succeeded len=1 ret=1 a=0 u/d=up
Wed May 22 16:30:09 2013 C:\WINDOWS\system32\route.exe ADD 93.115.84.194 MASK 255.255.255.255 10.0.0.1
Wed May 22 16:30:09 2013 Route addition via IPAPI succeeded [adaptive]
Wed May 22 16:30:09 2013 C:\WINDOWS\system32\route.exe ADD 0.0.0.0 MASK 128.0.0.0 10.8.0.129
Wed May 22 16:30:09 2013 Route addition via IPAPI succeeded [adaptive]
Wed May 22 16:30:09 2013 C:\WINDOWS\system32\route.exe ADD 128.0.0.0 MASK 128.0.0.0 10.8.0.129
Wed May 22 16:30:09 2013 Route addition via IPAPI succeeded [adaptive]
Wed May 22 16:30:09 2013 C:\WINDOWS\system32\route.exe ADD 10.8.0.1 MASK 255.255.255.255 10.8.0.129
Wed May 22 16:30:09 2013 Route addition via IPAPI succeeded [adaptive]
Wed May 22 16:30:09 2013 Initialization Sequence Completed
Wed May 22 17:30:00 2013 TLS: soft reset sec=0 bytes=110395/0 pkts=1556/0
Wed May 22 17:30:01 2013 VERIFY OK: depth=1, C=CH, ST=Zurich, L=Zurich, O=vpnbook.com, OU=IT, CN=vpnbook.com, name=vpnbook.com, emailAddress=admin@vpnbook.com
Wed May 22 17:30:01 2013 VERIFY OK: depth=0, C=CH, ST=Zurich, L=Zurich, O=vpnbook.com, OU=IT, CN=vpnbook.com, name=vpnbook.com, emailAddress=admin@vpnbook.com
Wed May 22 17:30:01 2013 Data Channel Encrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Wed May 22 17:30:01 2013 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed May 22 17:30:01 2013 Data Channel Decrypt: Cipher 'AES-128-CBC' initialized with 128 bit key
Wed May 22 17:30:01 2013 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication
Wed May 22 17:30:01 2013 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA
That gave me a new interface 10.8.0.130 and public IP 93.115.84.194

ipconfig and routs on first VM are now these:

Code: Select all

C:\>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : XP-SP3-net-nr2a
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-1F-E1-E9
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 10.0.0.8
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.0.1
        DNS Servers . . . . . . . . . . . : 10.0.0.1

Ethernet adapter Local Area Connection 2:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : TAP-Windows Adapter V9
        Physical Address. . . . . . . . . : 00-FF-A1-71-C6-00
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.8.0.130
        Subnet Mask . . . . . . . . . . . : 255.255.255.252
        Default Gateway . . . . . . . . . : 10.8.0.129
        DHCP Server . . . . . . . . . . . : 10.8.0.129
        DNS Servers . . . . . . . . . . . : 1.2.3.4
                                            1.2.3.5
        Lease Obtained. . . . . . . . . . : 22 may 2013 16:30:08
        Lease Expires . . . . . . . . . . : 22 may 2014 16:30:08


C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...08 00 27 1f e1 e9 ...... AMD PCNET Family PCI Ethernet Adapter - Packet Scheduler Miniport
0x3 ...00 ff a1 71 c6 00 ...... TAP-Windows Adapter V9 - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.1        10.0.0.8       1
          0.0.0.0        128.0.0.0       10.8.0.129      10.8.0.130       1
         10.0.0.0    255.255.255.0         10.0.0.8        10.0.0.8       20
         10.0.0.8  255.255.255.255        127.0.0.1       127.0.0.1       20
         10.8.0.1  255.255.255.255       10.8.0.129      10.8.0.130       1
       10.8.0.128  255.255.255.252       10.8.0.130      10.8.0.130       30
       10.8.0.130  255.255.255.255        127.0.0.1       127.0.0.1       30
   10.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       20
   10.255.255.255  255.255.255.255       10.8.0.130      10.8.0.130       30
    93.115.84.194  255.255.255.255         10.0.0.1        10.0.0.8       1
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        128.0.0.0        128.0.0.0       10.8.0.129      10.8.0.130       1
        224.0.0.0        240.0.0.0         10.0.0.8        10.0.0.8       20
        224.0.0.0        240.0.0.0       10.8.0.130      10.8.0.130       30
  255.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       1
  255.255.255.255  255.255.255.255       10.8.0.130      10.8.0.130       1
Default Gateway:        10.8.0.129
===========================================================================
Persistent Routes:
  None
Second VM (IP 10.0.0.5):
This second VM should be able to use the internet connection provided by OpenVPN in the first VM above.
To set the first VM as default gateway for this second VM, I entered this command:

Code: Select all

route add 0.0.0.0 mask 128.0.0.0 10.0.0.8
In this second VM, I can now ping 10.0.0.8 and 10.8.0.130.
But I can NOT ping 10.8.0.129 or 93.115.84.194 or 8.8.8.8 (no internet connection).

ipconfig and routs on second VM are these:

Code: Select all

C:\>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : XP-SP3-net-nr2b
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-1C-33-7B
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.0.0.5
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.0.1
                                            10.0.0.8
        DHCP Server . . . . . . . . . . . : 10.0.0.1
        DNS Servers . . . . . . . . . . . : 10.0.0.1
        Lease Obtained. . . . . . . . . . : 22 may 2013 16:20:27
        Lease Expires . . . . . . . . . . : 23 may 2013 16:20:27

C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...08 00 27 1c 33 7b ...... AMD PCNET Family PCI Ethernet Adapter - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.1        10.0.0.5       20
          0.0.0.0        128.0.0.0         10.0.0.8        10.0.0.5       1
         10.0.0.0    255.255.255.0         10.0.0.5        10.0.0.5       20
         10.0.0.5  255.255.255.255        127.0.0.1       127.0.0.1       20
   10.255.255.255  255.255.255.255         10.0.0.5        10.0.0.5       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        224.0.0.0        240.0.0.0         10.0.0.5        10.0.0.5       20
  255.255.255.255  255.255.255.255         10.0.0.5        10.0.0.5       1
Default Gateway:          10.0.0.8
===========================================================================
Persistent Routes:
  None

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 12:22 am
by janjust
in order to reach other machines the first VM must allow IP forwarding; your 'ipconfig /all' info shows
IP Routing Enabled. . . . . . . . : No
You can enable IP forwarding by setting a registry key and rebooting; see http://support.microsoft.com/kb/315236 for details.

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 8:32 am
by Magnitude
I have enabled IP forwarding now on first VM, restarted VM and confirmed with 'ipconfig /all' that it is enabled.

Same as before. Second VM can ping first VM IP (10.0.0.8 and IP of OpenVPN interface) but can not ping 8.8.8.8 or any other public IP.

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 10:40 am
by janjust
what happens if you run

Code: Select all

tracert -n 8.8.8.8
in the first VM? can it reach that host? what route does it take?

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 11:46 am
by Magnitude
Well, -n does not seem to be a valid command switch for tracert. But this works:

Code: Select all

C:\>tracert 8.8.8.8

Tracing route to google-public-dns-a.google.com [8.8.8.8]
over a maximum of 30 hops:

  1    87 ms    88 ms    88 ms  10.8.0.1
  2    87 ms    87 ms    80 ms  buc-ird-27sw.voxility.net [93.115.84.193]
  3    79 ms    83 ms    80 ms  buc-ird-01c.voxility.net [109.163.235.181]
  4    82 ms    78 ms    84 ms  buc-ird-03gw.voxility.net [109.163.235.153]
  5   125 ms   115 ms   120 ms  fra-anc-01gw.voxility.net [109.163.235.166]
  6   157 ms   143 ms   155 ms  de-cix20.net.google.com [80.81.193.108]
  7   119 ms   123 ms   117 ms  72.14.238.44
  8   123 ms   129 ms   114 ms  72.14.239.60
  9   296 ms   308 ms   318 ms  209.85.254.112
 10     *        *        *     Request timed out.
 11   116 ms   113 ms   115 ms  google-public-dns-a.google.com [8.8.8.8]

Trace complete.
Since vpnbook give me a different local IP each time, I probably should also give you this:

Code: Select all

C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...08 00 27 1f e1 e9 ...... AMD PCNET Family PCI Ethernet Adapter - Packet Scheduler Miniport
0x3 ...00 ff a1 71 c6 00 ...... TAP-Windows Adapter V9 - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.1        10.0.0.8       1
          0.0.0.0        128.0.0.0       10.8.1.149      10.8.1.150       1
         10.0.0.0    255.255.255.0         10.0.0.8        10.0.0.8       20
         10.0.0.8  255.255.255.255        127.0.0.1       127.0.0.1       20
         10.8.0.1  255.255.255.255       10.8.1.149      10.8.1.150       1
       10.8.1.148  255.255.255.252       10.8.1.150      10.8.1.150       30
       10.8.1.150  255.255.255.255        127.0.0.1       127.0.0.1       30
   10.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       20
   10.255.255.255  255.255.255.255       10.8.1.150      10.8.1.150       30
    93.115.84.194  255.255.255.255         10.0.0.1        10.0.0.8       1
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        128.0.0.0        128.0.0.0       10.8.1.149      10.8.1.150       1
        224.0.0.0        240.0.0.0         10.0.0.8        10.0.0.8       20
        224.0.0.0        240.0.0.0       10.8.1.150      10.8.1.150       30
  255.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       1
  255.255.255.255  255.255.255.255       10.8.1.150      10.8.1.150       1
Default Gateway:        10.8.1.149
===========================================================================
Persistent Routes:
  None

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 4:30 pm
by janjust
sorry about that, it should have been

Code: Select all

tracert -d
what happens if you do this tracert from within the second VM? does it go straight to internet? what does the routing table on this client look like? the default route should point to the first VM .

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 5:24 pm
by Magnitude
I will give you the whole thing again for both VM's so you have it in one place, hopefully making it a little easier for you.

Host is Win7, VirtualBox 4.2.12.
First VM runs XP and OpenVPN connected to free vpnbook account. Routing is enabled on this VM.
Second VM runs XP and should be able to connect to internet using the OpenVPN connection in first VM.

I started first VM, and connected to vpnbook using OpenVPN 2.3.1 installed in this VM.
Then I started second VM and issued the following commands in it to set default gateway:

Code: Select all

route delete 0.0.0.0
route add 0.0.0.0 mask 0.0.0.0 10.0.0.8
Then I issued commands to produce output listed below for each VM.

First VM:

Code: Select all

C:\>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : XP-SP3-net-nr2a
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : Yes
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-1F-E1-E9
        Dhcp Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 10.0.0.8
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.0.1
        DNS Servers . . . . . . . . . . . : 10.0.0.1

Ethernet adapter Local Area Connection 2:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : TAP-Windows Adapter V9
        Physical Address. . . . . . . . . : 00-FF-A1-71-C6-00
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.8.0.94
        Subnet Mask . . . . . . . . . . . : 255.255.255.252
        Default Gateway . . . . . . . . . : 10.8.0.93
        DHCP Server . . . . . . . . . . . : 10.8.0.93
        DNS Servers . . . . . . . . . . . : 1.2.3.4
                                            1.2.3.5
        Lease Obtained. . . . . . . . . . : 23 may 2013 18:11:00
        Lease Expires . . . . . . . . . . : 23 may 2014 18:11:00

C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...08 00 27 1f e1 e9 ...... AMD PCNET Family PCI Ethernet Adapter - Packet Scheduler Miniport
0x3 ...00 ff a1 71 c6 00 ...... TAP-Windows Adapter V9 - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.1        10.0.0.8       1
          0.0.0.0        128.0.0.0        10.8.0.93       10.8.0.94       1
         10.0.0.0    255.255.255.0         10.0.0.8        10.0.0.8       20
         10.0.0.8  255.255.255.255        127.0.0.1       127.0.0.1       20
         10.8.0.1  255.255.255.255        10.8.0.93       10.8.0.94       1
        10.8.0.92  255.255.255.252        10.8.0.94       10.8.0.94       30
        10.8.0.94  255.255.255.255        127.0.0.1       127.0.0.1       30
   10.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       20
   10.255.255.255  255.255.255.255        10.8.0.94       10.8.0.94       30
    93.115.84.194  255.255.255.255         10.0.0.1        10.0.0.8       1
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        128.0.0.0        128.0.0.0        10.8.0.93       10.8.0.94       1
        224.0.0.0        240.0.0.0         10.0.0.8        10.0.0.8       20
        224.0.0.0        240.0.0.0        10.8.0.94       10.8.0.94       30
  255.255.255.255  255.255.255.255         10.0.0.8        10.0.0.8       1
  255.255.255.255  255.255.255.255        10.8.0.94       10.8.0.94       1
Default Gateway:         10.8.0.93
===========================================================================
Persistent Routes:
  None

C:\>tracert -d 8.8.8.8

Tracing route to 8.8.8.8 over a maximum of 30 hops

  1    80 ms    80 ms    80 ms  10.8.0.1
  2    89 ms    81 ms    89 ms  93.115.84.193
  3    87 ms    79 ms    79 ms  109.163.235.181
  4     *       80 ms    89 ms  109.163.235.153
  5     *        *        *     Request timed out.
  6   180 ms   168 ms   181 ms  80.81.193.108
  7   123 ms   122 ms   116 ms  72.14.238.44
  8   139 ms   123 ms   119 ms  72.14.239.60
  9   331 ms   334 ms   322 ms  209.85.254.112
 10     *        *        *     Request timed out.
 11   117 ms   121 ms   120 ms  8.8.8.8

Trace complete.

Second VM

Code: Select all

C:\>ipconfig /all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : XP-SP3-net-nr2b
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Unknown
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter
        Physical Address. . . . . . . . . : 08-00-27-1C-33-7B
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 10.0.0.5
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 10.0.0.8
        DHCP Server . . . . . . . . . . . : 10.0.0.1
        DNS Servers . . . . . . . . . . . : 10.0.0.1
        Lease Obtained. . . . . . . . . . : 23 may 2013 18:08:26
        Lease Expires . . . . . . . . . . : 24 may 2013 18:08:26

C:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...08 00 27 1c 33 7b ...... AMD PCNET Family PCI Ethernet Adapter - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0         10.0.0.8        10.0.0.5       1
         10.0.0.0    255.255.255.0         10.0.0.5        10.0.0.5       20
         10.0.0.5  255.255.255.255        127.0.0.1       127.0.0.1       20
   10.255.255.255  255.255.255.255         10.0.0.5        10.0.0.5       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
        224.0.0.0        240.0.0.0         10.0.0.5        10.0.0.5       20
  255.255.255.255  255.255.255.255         10.0.0.5        10.0.0.5       1
Default Gateway:          10.0.0.8
===========================================================================
Persistent Routes:
  None

C:\>tracert -d 8.8.8.8

Tracing route to 8.8.8.8 over a maximum of 30 hops

  1    <1 ms    <1 ms    <1 ms  10.0.0.8
  2     *        *        *     Request timed out.
  3     *        *        *     Request timed out.
  4     *        *        *     Request timed out.
  5     *        *        *     Request timed out.
  6     *        *        *     Request timed out.
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10     *        *        *     Request timed out.
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13     *        *        *     Request timed out.
 14     *        *        *     Request timed out.
 15     *        *        *     Request timed out.
 16     *        *        *     Request timed out.
 17     *        *        *     Request timed out.
 18     *        *        *     Request timed out.
 19     *        *        *     Request timed out.
 20     *        *        *     Request timed out.
 21     *        *        *     Request timed out.
 22     *        *        *     Request timed out.
 23     *        *        *     Request timed out.
 24     *        *        *     Request timed out.
 25     *        *        *     Request timed out.
 26     *        *        *     Request timed out.
 27     *        *        *     Request timed out.
 28     *        *        *     Request timed out.
 29     *        *        *     Request timed out.
 30     *        *        *     Request timed out.

Trace complete.

Re: Running client and app using connection in different VMs

Posted: Thu May 23, 2013 6:53 pm
by janjust
oh of course!
a packet from 10.0.0.5 is sent to 10.0.0.8; this packet should then be injected into the tunnel. However, the VPN *server* does not anything about this subnet; you'll need to set up some form of masquerading (this can be done using RRAS - it's so much easier on Linux :D)).

there is a post on this forum by a user Bebop about how to set this up in a Windows environment.

Re: Running client and app using connection in different VMs

Posted: Fri May 24, 2013 7:37 am
by Magnitude
Wow, Yessss, Yippi!!! Its working!

Thank you so much Jan for all your excellent help. And thank you Bebop for your howto's.

The solution was to enable Internet Connection Sharing on the TAP interface for OpenVPN in the first VM.
Howto for Win-XP: topic7815.html
Howto for Win7: topic7806.html

Re: Running client and app using connection in different VMs

Posted: Fri May 24, 2013 11:14 am
by janjust
Excellent news, closing topic
All times are UTC
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