So, good news. The person who was crashing our servers has been successfully stymied, thanks to acaos. In addition, we now have much more robust defense against similar attacks in the future, though I will not go into more detail than that. They have made a number of unsuccessful attempts to crash us since the fix, with no success.
We're fortunate to have such a gifted coder as acaos to defend us from these types of attacks. Unfortunately, that protection wasted a decent chunk of a day for him, so please thank him when you see him ingame, and consider donating to support the servers (donations go right to him these days, as he is hosting). We are also fortunate that the net impact was one evening of disruption and a few lost chests, which we will see corrected.
You can now play with a reasonable expectation of no externally-caused crashes, for now at least.
As for the crasher, DDoS attacks are a violation of federal law. We recorded the ips the attacks came from, and are in the process of making reports to the various providers - the main one of which was a VPN provider headquarter here in the US, in California. This was a sophisticated attack involving ips from numerous continents, making it a violation of international treaty, as well. We are taking every step available to hold them accountable. Should the attacker persist, the chances of prosecution will only increase, and we will pull every string available to make that happen.