Strange network related problem!

[gardiol]

Environment:
HOST: Windows XP
Installed Kubuntu 8.04 in VirtualBox
Migrated from VirtualBox 2.0.6 (no problem) to 2.1.0 (problem)

Situation:
On Kubuntu, i run an SSH tunnel with port-forwarding from inside the box to an external server over an HTTP Proxy server on port 443. I need to do this to run a service from a remote lan to my virtualbox which needs to bypass our corporare proxy server.

Problem:
Using VirtualBox 2.0.6 and NAT, it worked no problem for days
Using VirtualBox 2.1.0 and NAT i get frequent freezes during data transfers. The virtual box freezes and my host goes to a crawl for several seconds when i have data bursts on my ssh tunnels. This is VERY annoyng and makes everything usuable. This happens, usually, after a few minutes and seems to go away for a few more minutes after i shut the tunnel off and on again.

Workaround:
Use VirtualBox 2.1.0 in Host Interface mode.

The workaround can be used but it is far from good because my proxy is locked on my host MAC address and IP address...

I prefer not to downgrade, any suggestions?

[strichards]

Environment:
HOST: Windows XP
Installed Kubuntu 8.04 in VirtualBox
Migrated from VirtualBox 2.0.6 (no problem) to 2.1.0 (problem)

--cut--

The workaround can be used but it is far from good because my proxy is locked on my host MAC address and IP address...

I prefer not to downgrade, any suggestions?

Try using alternate network virtual device in guest. I had trouble with the virtual Intel device...