Monday, September 17, 2012

Oracle client connection through VPN

If you are attempting to connect to your Oracle RDS or EC2-based Oracle DB through SQL Developer and SQL Plus from a client machine, you will get a ORA-12541: TNS:no listener if connecting through VPN ( or maybe a corporate firewall ). If you can connect to your instance through SQL Plus on an EC2 instance, it could be because of VPN or a firewall.

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