Erro ORA 12537

[DanielBParticipante]

To activate Validnode checking, the following parameter must be entered in
PROTOCOL.ORA:

    protocol.validnode_checking = yes 

For example, for the TCP/IP protocol, the parameter would be:

    tcp.validnode_checking = yes 

For the DECnet protocol, the parameter would be:

    decnet.validnode_checking = yes 

The default is for Validnode checking to be off.

The access list for Validnode checking can take two forms: an invited_nodes
list and an excluded_nodes list. The two lists are mutually exclusive. If both
are present, the invited_nodes list takes precedence over the excluded_nodes
list.

Sample Access List

The following is a sample access list in PROTOCOL.ORA for the TCP/IP protocol:

    tcp.invited_nodes = (drummer.us.com, 
                        139.185.5.73, 
                        139.185.5.111) 

This list grants access to the three nodes listed, and excludes all others.

An alternative way of limiting connection requests is to exclude specific
nodes. The following list provides access to all nodes except those listed:

    tcp.excluded_nodes = (drummer.us.com, 
                         139.185.5.73, 
                         139.185.5.111) 

Note: Not all protocols and operating systems support Validnode Verification.
See the operating system-specific documentation for your platform for further
details.