Opened 10 years ago
Closed 9 years ago
#432 closed Bug / Defect (fixed)
OpenVPN.exe hangs upon reconnecting
| Reported by: | shio | Owned by: | |
|---|---|---|---|
| Priority: | major | Milestone: | release 2.3.4 |
| Component: | tap-windows | Version: | OpenVPN 2.3.4 (Community Ed) |
| Severity: | Not set (select this one, unless your'e a OpenVPN developer) | Keywords: | ndis6, windows, server |
| Cc: | Samuli Seppänen |
Description
After upgrading from I002 (old NDIS) to I603 (new NDIS) on Windows 7 SP1 x64, the main exe, running as a server, stops working if I use the "Reconnect" button on the GUI.
The exe doesn't answer and the process cannot even be taskill'ed.
Resource usage stays slow but the server isn't answering anymore so a restart of the OS is required.
It occurs only if someone is already connected to the server and it doesn't matter if the client is using the old or the new NDIS driver.
Reverting to the old NDIS driver also fixes the issue.
Attachments (2)
Change History (13)
Changed 10 years ago by
comment:1 Changed 10 years ago by
I've seen similar behaviour with I603 (NDIS6 / new NDIS). In my case, I was using it as a client.
When connecting to the server everything seems to work just fine. After all the connection setup is completed, the TAP interface is configured. Somehow this fails, and the logs at verb 4 just show 'Closing TUN/TAP interface' (or something similar, I didn't store the logs) after which the process hangs and can no longer be terminated.
I did remove all TAP adapters, rebooted, freshly installed a TAP-adapter and verified it was an NDIS6 adapter. Problem persisted.
Since this was a production machine and I needed it at that point I didn't investigate further. I switched to I003 and everything worked like a charm again.
comment:2 Changed 10 years ago by
| Cc: | Samuli Seppänen added |
|---|
comment:4 Changed 9 years ago by
I believe I also have this issue. (Hardware: Asus T100, fresh out the box)
In my case the client has the problem. The connetion succeeds, but it does not function correctly. Upon disconnect openvpn.exe reports "Closing TUN/TAP interface" and then becomes unkillable. I currently believe it is caused by the following bug in the NDIS6 tap driver: https://github.com/OpenVPN/tap-windows6/issues/3
A bugfix is available: https://github.com/OpenVPN/tap-windows6/commit/54efe89632a23aced27c625a5e5d5e477fd08675
In my case, building the fixed driver solves the issue completely. Unfortunatly, the fixed driver is really quite hard to load due to Windows driver signature enforcement. Every boot, I have to reboot to disable signature enforcement which requires entering the bitlocker key as the Asus T100 has secure boot enabled.
I would love to see this fix make it's way into a signed binary.
comment:5 Changed 9 years ago by
I'm wrapping up updated tap-windows6 installers. Due to issues in tap-windows6 buildsystem it has taken a bit of time, but I should have a fixed version available early next week. Updated OpenVPN Windows client installers will come soon after that.
comment:9 Changed 9 years ago by
Excellent! I'll make a new OpenVPN Windows installer release soon, probably early next week.
comment:10 Changed 9 years ago by
New OpenVPN Windows installers with tap-windows-9.21.1 (build number I602) are out:
comment:11 Changed 9 years ago by
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
Server log (verb 4)