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How to Secure your Oracle Listener Process

Arup Nanda, author of Oracle Privacy Security Auditing by Rampant Tech Press, brings us an intriguing article on securing the Oracle listener process.

Because Oracle listener is a major component of Oracle and susceptible to attcks from hackers, it is very important to understand how to secure the Oracle listener:

Most of the attacks in the listener start either by passing a malicious command to be executed in the operating system or by modifying the listener settings.

Nanda gives tips on securing the listener with the following:

Setting the Passwords

Setting a password for listener is the least security you should maintain for it. By default, it doesn't have any password and many DBAs simply do not create one.

Entering Passwords

The password can be set either by specifying through the command CHANGE_PASSWORD, or through a parameter in listener.ora file.

Encrypted Passwords

The other option in specifying the password of the listener is to record the password encrypted in the parameter file.

How to Check If the Password is Set

From the listener control prompt, issue the command STATUS. If the Security setting is shown as ON, then the password is set for the listener.


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