Adding firewall rules for Oracle Database using iptables
Posted on Tuesday March 18, 2014
To connect to a box on your network that is running Oracle Database, you will first need to allow connections to Oracle through your firewall.
If you’re running CentOS, RHEL, Fedora or any other Linux variant that uses iptables, use the following commands to create a firewall exception (Assuming you’re running your listener on port 1521 - check with sudo lsnrctl status):
sudo iptables -I INPUT -p tcp --dport 1521 -j ACCEPT