Rcon password stealing

6 Months ago, my server killed by using rcon (which isn’t from Admin side)
and I checked log file i saw this:

" Received broadcast message from master server which is not authoritative "

" rcon from xxx: killserver "

What’s this?
Can this happen again to my server?
This is a security bug?

@dpj
any replay???

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Do you store your rcon password in your server config file. If you do then remove it and add it to your server start up command line

Hey, thanks for answer
am don’t using it on server.cfg

Maybe it is possible that they brute forced your rcon password? Otherwise I do not know.

I cheked tbe log, but i didn’t see any bad rcon alert…