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Chapter 7 Oracle Network Security

Figure 7.8 Typical Client and Server Restrictions Based on Departments

In this network, the application servers CLAIMS1 and CLAIMS2 access the database on server CLAIMDBSVR. Since we know that no client machines other than the ones shown here are going to access the server database, the Net8 listener on the database server can be configured to accept connections only from these machines. The network also has some other servers, such as the application servers ENROLLMENT1 and ENROLLMENT2 accessing the database on server ENROLLDBSVR. The listener on CLAIMDBSVR can be configured so that the connection requests from ENROLLMENT1 and ENROLLMENT2 are rejected and CLAIMS1 and CLAIMS2 are accepted.

This can be done suing a facility called Valid Node Checking in Net8. A set of parameters can be placed in

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