Il 07/06/19 20:19, Selva Nair ha scritto: > Hi JJK, > > On Fri, Jun 7, 2019 at 11:09 AM Jan Just Keijser <janj...@nikhef.nl> wrote: >> >> hi all, >> >> in the eduVPN project we've run into a strange issue: >> HP Envy laptops running Windows 10 have a "handy" feature to >> automatically switch from wifi to a 'wired' adapter if one is detected. >> The use case behind this is that if you put your laptop in a docking >> station (with LAN) it will auto-switch to it. >> How does this relate to OpenVPN: when an OpenVPN connection is >> established, the HP Envy driver gimmick detects the tap-windows device >> as a LAN adapter and switches off wifi -regardless of whether you are on >> a LAN or not. Thus, "plain" OpenVPN 2.4 becomes quite hard to use on >> these laptops. >> Now the strange part is, that both Viscosity and NordVPN - each with >> their own tap-win adapters do NOT have this problem. >> So my question now is: what could be causing this and how can we >> resolve it. >> The patches the Viscosity folks made to the tap-win driver for their >> setup are in github (pull request #47, IIRC) and I don't see anything >> truly strange in that patch. >> The only thing that seems to be different is whether a device is >> sporting the UI flag in the "characterstics" section. >> >> Does anybody have a clue how to best approach this? > > One thing I've noticed is that in the driver inf file viscosity has set > > characteristics = 0x1 ; NCF_VIRTUAL > > It goes into the registry entries for the device node. > > They don't seem to have a link to download the patched source (have to > make a request by email -- no idea whether a paid license is also > required), so I haven't looked for any other changes in the sources. > Possibly you could ask for the source code and do a diff. > > > Selva
Hi, This is tangential, but I wonder if these "characteristics" (also) have an effect on which HLK tests are required? Rozmansi's "Introduce TAP adapter as a virtual device" does not touch them: https://github.com/OpenVPN/tap-windows6/pull/84/files That PR, as-is, did not help narrow down the scope of HLK tests. The wintun driver has this in characteristics: wintun.inf:Characteristics = 0x1 ; NCF_VIRTUAL Default tap-windows6 has version.m4:define([PRODUCT_TAP_WIN_CHARACTERISTICS], [0x81]) Thoughts? -- Samuli Seppänen Community Manager OpenVPN Technologies, Inc irc freenode net: mattock _______________________________________________ Openvpn-users mailing list Openvpn-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/openvpn-users
