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OpenVPN / tap-windows6

Windows TAP driver (NDIS 6)
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Allow MTU > 1500 (9000 for Jumbo Frames?) #13

Open ziesemer opened 9 years ago

ziesemer commented 9 years ago

I'd like to try using this virtual TAP adapter as an alternative to the Microsoft Loopback Adapter (now called "KM-TEST"). I was excited to see that this OpenVPN implementation allows for a configurable MTU in the driver properties, but doesn't allow for a value > 1500 to be entered. Would it be possible to support larger values here (e.g. 9000), for the purpose of supporting Jumbo Frames?

Supporting larger MTUs for OpenVPN across VLANs on an internal Jumbo Frame-enabled network could also be another potential use-case for this.

(I could make the necessary edits and build myself, but the lack of a Windows code signing certificate quickly becomes a show-stopper here.)

Thanks!

mattock commented 7 years ago

This response comes a bit late, but anyways... you can put Windows into "Test mode" in which it accepts unsigned kernel drivers. That works at least on Windows 7, but I'm pretty sure even Windows 10 has that capability.

If you make your changes to the driver, test them and issue a PR, I can build a real signed driver that can be exposed to wider testing.

war59312 commented 7 years ago

FYI: Easy way to enable Windows Test Mode: http://www.ngohq.com/?page=dseo

Simply run as admin, click "next", then "yes". Choose the option "Enable Test Mode", then click "next".

PS: "Remove Watermarks" comes in handy. That way you can keep windows in test mode without the annorying Watermarks on the desktopo and other places.

If no luck that way, then you can also try this: https://support.microsoft.com/en-us/kb/2509241

Of course just do the opposite to enable test mode.