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I'm using CentOS-7 and configuring two servers to run OTRS System, but the Database Server Firewall "Firewalld" is dropping the Application Server requests for RDA "Remote Database Access". Because when i stop the firewalld service, database is accessed successfully. How can i make an exception for the RDA Process through the Firewalld?

Omar Aladdin
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1 Answers1

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Yeah I solved it. In the Database Server i added the mysql service instead of the protocol RDA to the firewall rules using the strong rule:

firewall-cmd --add-rich-rule 'rule family="ipv4" source address="$APPLICATION_IPV4_ADDRESS" service name="mysql" accept' --permanent`

Or you can simply open MySQL port for all IPs "not recommended" as follows:

firewall-cmd --zone=public --add-service=mysql --permanent

Best Luck,

Omar Aladdin
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