The default Oracle listener uses Port 1521. However, the listener can be configured
to connect using any available TCP port.
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On the Start menu, click All Programs, locate the Oracle folder > Configuration and Migration Tools and start the Net Configuration Assistant.
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In the Oracle Net Configuration Assistant Wizard, select Listener configuration and click Next.
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Select Add and then click Next.
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Define the listener name, for example, LISTENER and click Next.
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On the Listener Configuration, Select Protocols page, select TCP and click Next.
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On the remaining Wizard pages, click Next and then click Finish to complete the listener creation.