Problems with one DNS forwarding server (FIXED)

One of isnic's forwarding servers, hosted in Europe is not working at the moment. The problem started today just after 17:00.

We're working on diagnosing and fixing the problem

Update: One of the servers hosting our forwarding service (DNS and HTTP) lost IPv4 connectivity at 17:00. The problem was fixed at 20:00. IPv6 was not affected.