Last updated on OCTOBER 27, 2016
Applies to:Oracle Net Services - Version: 9.2 to 10.2
This problem can occur on any platform.
Client connection via SSH Tunnel fails with ORA-12547 with IP Filter (TCP Valid Node checking) enabled on the database server.
ie, even if the client IP address is listed in the tcp.invited_nodes , when the client connects via the SSH Tunnel (with port forwarding enabled on the client side) it errors with ORA-12547.
ORA-12547: TNS:lost contact
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