Oracle 19 为远程访问开启渠道（oracle19放通端口）

Oracle 19c: Opening Channels for Remote Access

In today’s interconnected world, data accessibility is key to successful business operations. With remote access capabilities, employees can access data from anywhere at any time, increasing productivity and efficiency. In Oracle 19c, there are steps that system administrators can take to allow remote access channels.

To enable remote access, the Oracle listener needs to be configured with the appropriate protocols and ports. By default, Oracle uses the Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) for network communication. These protocols need to be enabled in the listener.ora file, located in the $ORACLE_HOME/network/admin directory. The following code can be added to the file to enable TCP and UDP protocols:

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))

)

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

)

)

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(GLOBAL_DBNAME = orcl)

(ORACLE_HOME = /u01/app/oracle/product/19.0.0/dbhome_1)

(SID_NAME = orcl)

)

)

The above code specifies that TCP is enabled on port 1521 and IPC (Interprocess Communication) on port 1521. Additionally, the SID_LIST parameter specifies the Oracle System Identifier (SID) for the database that the listener is listening to.

Once the listener configuration is complete, the next step is to configure the firewall to allow traffic on the specified protocols and ports. The firewall settings can vary depending on the operating system being used. On a Linux operating system, for example, the following commands can be used to open ports 1521 and 1522 for TCP and UDP protocols:

sudo iptables -I INPUT -p tcp –dport 1521 -j ACCEPT

sudo iptables -I INPUT -p udp –dport 1521 -j ACCEPT

In addition, if the database server is accessed over the internet, a Virtual Private Network (VPN) can be set up to ensure secure and encrypted access.

In conclusion, with the proper configurations in place, remote access channels can be opened in Oracle 19c to provide employees with increased data accessibility. System administrators should ensure that the listener is configured with the appropriate protocols and ports, and the firewall is set up to allow traffic on those ports. Additionally, a VPN can be set up to provide secure remote access to the database server.