In linux, the mysql link is blocked by the firewall. Solution

This article describes in detail how to prevent mysql connections from being blocked by the firewall in linux. For more information, see.

This article describes in detail how to prevent mysql connections from being blocked by the firewall in linux. For more information, see.

Mysql has been installed. You cannot access the account from other machines and have authorized access from any host.

Vi/etc/sysconfig/iptables

Add

-A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport 3306-j ACCEPT

Service iptables restart

No

The final discovery record must be added

-A RH-Firewall-1-INPUT-p icmp -- icmp-type any-j ACCEPT this one before restarting OK again