My provider says that they run an 'unfiltered' network, so it's not a network issue. Not entirely convinced...but they aren't being very helpful.

Basically two days ago started having issues with DNS completely stop working for anywhere between 2-20minutes. This happens roughly every 1-2 hours at least once.

I later then found that I am unable to ping ANY external IP address when this is going on. So it's not a DNS issue.

Whats even more odd is when this is going on, I STAY connected via RDP, and I can access webpages, etc that are on the server when I access from my home computer.

Have tried disabling the firewall--no fix. Have checked Event viewer, the only thing that is there is a warning that DNS has stopped working.

I have made no changes/updates to the server. The only thing I have done is add an IP address (don't think it has anything to do with the problem, but wanted to mention everything).

Any help/insight/suggestions on how to go about debugging would be much appreciated!

update: I am also running Hyper-V, and a virtual network.

I just tried pinging (when I have issues), from a Hyper-V machine--and it works, when the main server doesn't.