Opened 7 months ago

#1242 new Bug / Defect

Dropped Packages on Windows Server 2012 with routing enabled

Reported by: Erikkolo Owned by:
Priority: major Milestone: release 2.4.8
Component: Networking Version: OpenVPN 2.4.7 (Community Ed)
Severity: Not set (select this one, unless your'e a OpenVPN developer) Keywords:


On Windows Server 2012 I have issues with dropped packages, when I have enabled IP routing on the server (IPEnableRouter=1).
When I disable the routing, everything is fine and the rtt of each package is low as expected. Then I enable the routing without any other changes in the configs and the rtt of around 30% of packages goes >3000ms (from 40ms).
This is also the case if I only ping this OpenVPN server from a vpn client, so there should be no routing to the outside of the tunnel.

Now I switched back to version 2.3.18-I001 and the issue is gone. I use the same config for my tests with 2.4.8 and 2.3.18:
port 1194
proto udp
dev tun
route-delay 20 10
ip-win32 netsh

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