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I was working on some queries and then my HeidiSQL froze, I tried to reboot the connection and I get good old MYSQL Error (2003) (10060). It worked just fine before that.

I haven't made any firewall changes, and I checked the "white list" of IPs on AWS it still was fine. I encountered this error code before but never during work with no changes.

Thoughts?

Edit 1:
I turned OFF firewall and still same error

Edit 2:
It works all of a sudden, but I would like to know why such thing happened. Connection issues?

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