TCP/IP connection to the host Beast using port number 1521 failed. - Discussion - BMC Community
Portforwarding with SSH (Putty)
Listener Problems - Oracle Forums
3 Connecting to Oracle Database XE
SCAN listener client connections | Spot on Oracle
SQL Data Analysis Help
Enabling Advanced Features for Oracle Net Services
Creating an Oracle Listener with Oracle Network Configuration Assistant
Configuring Enterprise Manager for Firewalls - 12c Release 2 (12.1.0.2)
Open a Firewall Port for Oracle
Solved: Confirm about Oracle DB Listener: TCP/1521 requirement - Cisco Community
Setup OEMCC 13C behind firewall – Mufalani – DBA (OCM)
Solved: NMAP shows service 1521 is closed | Experts Exchange
Open a Firewall Port for Oracle
Configuring Oracle database TLS for client connections and authentication | by Harinderjit Singh | Apr, 2023 | ITNEXT
Network and Connectivity Requirements for Oracle Environments
dbi Blog
dbi Blog
Robert Crames' Oracle Database and Middleware Blog: ODA X6 - netca cannot add listener - displaying 'Use another port number' messages
Change Oracle Listener port number from default 1521 to other
Network and Connectivity Requirements for Oracle Environments
Two listeners running: Port 8080 and Port 1521 (Oracle/OAS forum at Coderanch)
Ports to Open in Firewalls
How to connect Oracle Database to Oracle Developer? - Stack Overflow
Linux 6.7 telnet: connect to address x.x.x.x: No route to host – Oracle Labs by Yuri Khazin, Oracle DBA
