[Openvpn-users] SMB and Network Path Delays

[Colin R. <co...@ca...>]

Ok folks, I'll try my best to explain the issues.

Backends: OpenVPN 2.0.9 and 2.1.rc4 on Debian Linux
Clients: Windows XP SP2 (but clearly some differences in update levels, 
see below)

Pretty Standard Configurations:

* Running in Tun Mode
* Running over TCP not UDP
* No Fragmentation or MSSFix directives (as I understand it these are 
generally UDP only parameters).
* Tried toplogy subnet as well in 2.1.rc4 server tests.
* Tried in configurations where I'm fully routing to back end server and 
where the VPN server is MASQURADING to the back-end network.

The problem is the following:

* Client Establishes Connection.
* If I then IMMEDIATELY attempt to access an SMB share via \\<IP 
Address> I will on some Windows clients get
"No network provider accepted the given network path" error.

However if I wait a few seconds it works, just fine. However TCP Ping's 
are immediately successful, and there is no difference if one uses DNS 
Name or IP address so it appears to be a pure SMB issue.

I realize you'll now simply say..what are the differences in Update 
Levels of the Windows Systems involved, but I'm just wondering if anyone 
has ever experience anything like this before.

Cheers