AZURE BL 2-6 Oracle port 1521 is restricted to public access



By allowing public access (from IP  over the internet to Oracle database ports you are allowing attackers all over the internet to access your Oracle instance and attempt exploitation of known vulnerabilities in Oracle or use brute force techniques to gain access to servers, data, and information systems.



Azure Portal

  1. Go to Azure Portal 
  2. Select Network Security Groups under resources
  3. Go to Security Group (or all groups one at a time)
  4. Under Settings->Inbound Security Rules
  5. On the right-hand pane, review the list of security rules
  6. Remove or update any inbound rule where incoming / ingress traffic is allowed from source IP '' and destination port is 1521 with protocol TCP or any


Additional documents