Running Cloudmin on OVH servers

Have been struggling for a while to make Cloudmin to properly work on an OVH server. Many settings had to be adopted to match quite strange peculiarities of OVH. For example, bridging per http://www.virtualmin.com/documentation/cloudmin/bridge worked, but was not ok with OVH's recommendations http://forum.ovh.co.uk/showpost.php?p=31754&postcount=21, so we had to set our networks according to their instructions on http://help.ovh.co.uk/BridgeClient

Now we are having several problems, for example this one http://www.virtualmin.com/node/18860#comment-112735, but the main problem is that while guest systems are running, Cloudmin host system becomes unavailable both through SSH and https and we have to reboot the server to re-gain the access over and over again. Which logically tells us there might be something wrong with networks - guest systems settings conflict with host. But what I don't understand how can guest override host. Anyway, what other possible reasons might be there for this strange behavior? There is not Apache or anything extra on the host, Cloudmin had been installed on a completely fresh system.

Little bit off the topic:

Overall conclusion from days and days of struggle to make Cloudmin to work on OVH server: OVH with its non-standard settings in everything really badly sucks. Cloudmin had been working for us on every other hosting vendors, but OVH.