… | grep Abort | grep -v 0 And then I started tcpdump in another window: [percona@server ~]$ tcpdump -s 1500 -w tcp.out port 3306 After I saw an aborted connection… packets: [percona@server ~]$ strings tcpdump.out Host ‘XXX.XX.XX.XXX’ is not allowed to connect to this MySQL server I’ve anonymized…

