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Oracle Tips by Burleson

Chapter 7 Oracle Network Security

The next task is to place the following parameters on the file sqlnet.ora in the TNS_ADMIN directory of the second home, located in /u02/oracle/product/9.2/network/admin.

tcp.validnode_checking = yes
tcp.excluded_nodes = (enrollment1, enrollment2)
tcp.invited_nodes = (claims1, claims2)

These lines are not present in the file sqlnet.ora under the directory /u01/oracle/product/9.2/network/admin.

The next step is to configure two listeners. Since they should be listening on separate ports, we will configure a listener that allows unrestricted access as listener1, listening on port 1521. The other listener will be named listener2 and will listen on port 1526. On the first Oracle Home, under the directory for TNS_ADMIN, typically /u01/oracle/product/9.2/network/admin, modify the file listener.ora to look like the following.

LISTENER1 =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
     
(ADDRESS_LIST =
        (ADDRESS =
          (PROTOCOL = TCP)
          (HOST = claimdbsvr1)
          (PORT = 1521)
        )
      )
    )
  )


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