I had to take the forum offline, because the server became overloaded.
After investigating, I found this was because of a so-called "DDOS" attack from China.
(DDOS = Distributed Denial Of Service, where a large number of hacked computers (a "botnet") are used to overload a web server, for example).
I have taken some steps to reduce the impact. I could have just blocked China completely, but that would not be nice for the 10 or so active puzzlers from China...
I don't know if my current solution will hold up, the attackers could always switch to a different botnet, for example.
Strange that this website was targeted. Hopefully, they won't bother again.
Yes. From searching the web it seems this happens more often (attacks from China on "phpbb", the software I use for the forum). No clue about the reason behind it though, maybe it was a random attack.
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