The issue started with a major packet loss on this node. We couldn't even get into the shell to check.
First, we have suspected a DDoS attack and alerted our datacenter. They told us that there was no attack.
Then we've gotten them to replace our cables as well as their cables to the top of the rack switch. This has not solved the problem.
Then we've gotten them to swap the network cable to the other ethernet port. Unfortunately, this has not solved the problem, either.
After eliminating the hardware issues, we have started to troubleshoot the issue (very slowly, due to the high load caused by the attack!) on the IPMI console further. And then we have realized that there was indeed an attack on one of the IPs which our DC failed to recognize.
We have nullrouted the target IP manually and the packet loss issue is gone.
Your VPS is currently up and running.
We are terribly sorry for the downtime this has caused you and we want to make it up to you. Please open a ticket to redeem $5 credit on your account for the trouble.