Telnet remote ip 3306 does not work?

1 telnet localhost 3306 can reach
2 telnet remote ip 3306, but
3 has nothing to do with the firewall. Before fire, it is turned off
4 bind to 0.0.0.0 my.cnf
. Please have a look.

Mar.03,2021

netstat -antp|grep 3306

above figure

Aliyun's server? Then you have to look for it in the server security team

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