I am playing around with an application to do some remote connection and I am struggling with understanding the tun/tap. I have installed OpenVPN tuntap driver and can connect/configure it through my application but I need some clarification.
If I use it in TAP mode I need to bridge my network adapters correct??
How would a TUN interface be setup?? I know that I need to call DeviceIoControl with TAP_IOCTL_CONFIG_TUN and I think I understand how but my research leads me to think I also need to add into the windows routing tables??
Can someone layout what a typical TUN Layer3 VPN would look like
Thanks
Matt
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I want to create a tunnel between my computer (which is connected to the router via ethernet and runs on windows) and another computer in the same subnet.
I chose WINTUN.dll for this purpose because it is much faster and more efficient than OpenVPN.
I can't find a way to start a season on the ethernet adapter on my laptop!
I tried using the adapter name found on MS INFO:
WINTUN_ADAPTER_HANDLE Adapter = WintunOpenAdapter(L"Realtek USB GbE Family Controller");'
Result: "error creating adapter, code: 1168"
I searched the library documentation and could not find anything on the subject.
Will Wintun work under any circumstances with non-Wintun adapters?
Any help will be appreciated! thank you!
You cant open your Realtek USB (...) Ethernet Adapter. Wintun is used to create a Layer 3 Network Adapter. You need to initialize wintun and afterwards create an Adapter. If there isnt one in your adapter settings, you cant open one. Id encourage you to implement the example.c from wintun.net. This way you will get the hang of it. If you want to use wintun for your scenario you will need to implement it by yourself. OpenVPN might be slow because it uses a TAP Adapter (wild guess) but you can change it to a tun adapter (e.g wintun). Hope that helps :)
I am running a VPN in windows 10 desktop (using OpenVPN) and the VPN is the default gateway, so that all traffic by default goes through the VPN tunnel.
However, I would like to exempt certain apps from the VPN, so that their traffic goes directly out the physical interface instead, by passing the VPN (so-called "split tunnelling")
I assume this solution would involve the WFP (Windows Filtering Platform) API, and perhaps the Windows equivalent of
setsockopt(sock, SOL_SOCKET, SO_BINDTODEVICE, device, sizeof(device))
I have this working in Linux currently via "cgroups" and policy-based routing/multiple routing tables.
But it is my understanding that Windows has neither policy based routing or multiple routing tables. But i can still think of a way of achieving this in Windows, but I cannot find the APIs to make it happen
One way is to hook the socket creation of a specific app and then use the windows equivalent of SO_BINDTO_DEVICE socket option (setsockopt()) to force the socket to be bound to the physical interface rather than the tap driver.
But, again, I cannot find the relevant APIs to make the above happen.
So I have a few questions:
(1) Is what i want to do possible within the given APIs of WFP (Windows Filtering Platform) or Windows APIs in genral? if so, which APIs do you advise i look at?
(2) Or, must i write a "WFP call-out driver" ? If so, would you be able to point me towards some resources for this, and possibility a good starting point for my particular problem? :)
(3) Is there anything else I might be missing? a simpler approach to achieve what i want? I know that it is possible in windows, as i have see the feature in some VPNs, but i would like to replicate it in my own personal VPN :)
Yes, you can force an app to use your VPN connection by copying and editing your (Windows) VPN connection.
Open the run prompt with: WIN+R
Type: ncpa.cpl
Copy your "old VPN" to APP_VPN (for example)
Open a Normal user Powershell
Change the new VPN connection with:
Add-VpnConnectionTriggerApplication -Name "APP_VPN" –ApplicationID "C:\path-to-your\game.exe" -Force
# Enable (Application) split-tunneling
Set-VpnConnection -Name "APP_VPN" -SplitTunneling $True
You can also check the VPN settings details in the phonebook in:
C:\Users\<User>\AppData\Roaming\Microsoft\Network\Connections\Pbk
Done!
I am working to create a wifi connectivity for a windows ce 7 device using connection manager. I am new to wince. Can anyone suggest how to establish a connection with a network. I actually wanted to have a list of available networks and to select a network from that. Please help me out in this situation. Awaiting your valuable responses. Thank you.
You mean listing all the available wi-fi networks and then connecting to one of them?
Do you need to have a UI for this (to enter the wlan password etc.) or you'll provide your own UI and just need low-level function to activate the connection?
I am trying to connect two windows phone emulators without router to form p2p network, is there any solution to connect them with access point without router and internet. and can be a possibility of using IP address of emulator.
answer plz
To the best of my knowledge no it is not possible in Mango - but is in WP8. You could however use a wireless network to perform create a UDP multicast socket and and then "connect" to one another that way.
Have a look at http://blogs.msdn.com/b/davrous/archive/2010/03/29/windows-phone-7-platformer-starter-kit-for-xna-studio-4-0.aspx it's got some pretty good pointers.
How do I control the network interface on Windows? Actually, the idea is quiet simple.
Establish connect to a certain adapter on a computer.
Direct whole traffic of the adapter to this program.
Give the rights to this program what must be transfer to the adapter and what should not.
I think the program has to implement any windows network adapter interface and be registered as an adapter driver. Thus, when it wants to transfer data to real adapter, the program has to call adapter driver methods. In their turn, the methods implement the same windows network interface (or that is called in other way don't really know, I hope you get the sense), don't they?
As a result, we have a kind of inheritance here.
Before use our new driver:
windows application and windows itself
________________________ windows network interface
DRIVER of Adapter1
________________________ end of OS boundaries
Adapter 1
Use our new driver:
windows application and windows itself
________________________ windows network interface
our DRIVER
________________________ windows network interface
DRIVER of Adapter1
________________________ end of OS boundaries
Adapter 1
I believe that kind of interface exists and I hope it is realized very easy.
You will likely need to hook Windows API calls to really do this. It is possible... Start by Googling hook API and Winternals - and see if you can find their sample code.
Before Winternals was bought by Microsoft they published their code. http://technet.microsoft.com/en-us/sysinternals/bb545021
The idea is this:
You write a user-mode program which controls your hooking device
driver.
Your hooking device driver determines if network traffic on
given API calls is ok.
Driver allows normal API calls to succeed if they are.