BDA Down?
Its fixed. To summarise the issue: The NAS (which hosts the files) has a default route, that goes to a gateway. That gateway is on a router, which CAN route the traffic to the server. And most of the time, it does... but sometimes, things dont work as expected. I've never been able to work out why...
But, I solved this by adding a static route on the NAS for the subnet used by the website, which should allow it to work bypassing the router - and sending the traffic direct to the node where the server is hosted. That works. EXCEPT, for some unknown reason - every so often - the server clears its route table. No idea why.
So. I solved that (today) with a scheduled task that runs every 15 minutes to check the route table on the NAS, and fix it if it is broken. When you cant hammer a nail into a hard piece of timber, get a bigger hammer!
CZ