Running 11.2.0.4 on a publicly accessible network is dangerous without compensating controls (WAF, DB firewall, strict network segmentation).
Here's a brief overview of the support options available for Oracle 11.2.0.4: oracle 11.2.0.4 support
While Sustaining Support lasts for as long as you license the product, it is primarily a "self-service" model. It includes: Running 11
Oracle Database 11g Release 2 (11.2.0.4) is a popular version of the Oracle database management system. Although it's an older version, many organizations still rely on it for their critical applications. In this article, we'll discuss the support landscape for Oracle 11.2.0.4, including its lifecycle, support options, and what you need to consider for your organization's database infrastructure. Although it's an older version, many organizations still
Oracle 11.2.0.4 has reached the Sustaining Support phase, which means limited support and maintenance are available. While it's still possible to use this version, organizations should carefully consider the security, support, and maintenance implications. Upgrading to a newer Oracle database version or engaging third-party support providers may be necessary to ensure the continued stability and security of your database infrastructure.
Based on the current support landscape, we recommend: