Networking problems with windows slaves

Hiya

The today's failure of my slaves can be explained two-way.
 First, buildslaves (windows ones especially, but not only) seem to be very vulnerable to
ping dropouts. A single icmp drop is resulting in build interruption.
 Second, the hetzner.de hosting is dropping packets from my provider (atman.pl) all the
way from teleport to reactos host, at a rate of one every few minutes or even more.

Combined those two, any build started at the moment is dropped after 2-3 minutes of
runtime.
I have no idea if the network issue is temporary or not, thus no chance to predict when we
will continue with runtime, Any ideas?

With best regards
Caemyr