Listener

How to Prevent Remote Service Register with Listener

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A vulnerability related to TNS listener has been reported in Oracle Security Alert for CVE-2012-1675, which is disclosed as “TNS Listener Poison Attack”. Attackers may exploit it to manipulate database instances without any authentication. A remote user may exploit it to influence the confidentiality, integrity and availability of database systems. With applying Class of Secure […]
Listener

How to Add a Cluster Listener on Second Network to Grid

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I assume that you have added the second network to the grid infrastructure. Let’s continue our work. Make sure the second network is available in the grid infrastructure. [grid@primary01 admin]$ srvctl config network -k 2 Network 2 exists Subnet IPv4: 10.0.8.0/255.255.255.0/eth2, static Subnet IPv6: Ping Targets: Network is enabled Network is individually enabled on nodes: […]
Listener

How to Resolve The listener supports no services

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The Listener Supports Services
The listener supports no services I newly created a database called SMALLDB, but I can’t see any service registered with the new LISTENER2 which is listening to incoming connections from port 1522. The listener showed “The listener supports no services”. In fact, this message tells us that the listener is working fine, but no dynamic […]