无法在 Azure VM 中 ping Oracle 端口 1521，但其他端口工作正常答案

【问题标题】：unable to ping Oracle port 1521 in Azure VM but other ports are working fine无法在 Azure VM 中 ping Oracle 端口 1521，但其他端口工作正常
【发布时间】：2022-12-30 17:28:12
【问题描述】：

我在 Azure 中创建了一个 VM(RHEL -linux) 并在其上安装了 Oracle DB。我想在我的 Windows 系统中使用“Oracle SQL Developer”连接到 Oracle DB。下面是 Listener 和 tnsnames 的详细信息。

cat listener.ora
# listener.ora Network Configuration File: /opt/oracle/product/19c/dbhome_1/network/admin/listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
           (GLOBAL_DBNAME = ORCLCDB)
           (ORACLE_HOME = /opt/oracle/product/19c/dbhome_1)
           (SID_NAME = ORCLCDB)
        )
)
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = azurerhel.internal.cloudapp.net)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )
ADR_BASE_LISTENER = /opt/oracle

tnsnames.ora的条目猫 tnsnames.ora

# tnsnames.ora Network Configuration File: /opt/oracle/product/19c/dbhome_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

ORCLCDB =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = azurerhel.internal.cloudapp.net)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ORCLCDB)
    )
  )

LISTENER_ORCLCDB =
  (ADDRESS = (PROTOCOL = TCP)(HOST = azurerhel.internal.cloudapp.net)(PORT = 1521))

Oracle 服务工作正常，没有任何问题。 lsnrctl status 显示的是这与上面文件中显示的不同。

Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 19.0.0.0.0 - Production
Start Date                10-DEC-2022 06:23:21
Uptime                    6 days 7 hr. 14 min. 55 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /opt/oracle/product/19c/dbhome_1/network/admin/listener.ora
Listener Log File         /opt/oracle/diag/tnslsnr/azureRHEL/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=azureRHEL.tolzstizeobujjzahdvcdkfbwa.rx.internal.cloudapp.net)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=azureRHEL.tolzstizeobujjzahdvcdkfbwa.rx.internal.cloudapp.net)(PORT=5500))(Security=(my_wallet_directory=/opt/oracle/admin/ORCLCDB/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "ORCLCDB" has 1 instance(s).
  Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "ORCLCDBXDB" has 1 instance(s).
  Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "ef748d50f3d7d6efe0530400000a867c" has 1 instance(s).
  Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
Service "orclpdb1" has 1 instance(s).
  Instance "ORCLCDB", status READY, has 1 handler(s) for this service...
The command completed successfully

但是当我从我的 Windows PC ping 时，所有其他端口 (80,22,443) 连接正常但不是端口 1521。

我已经在我的 PC 中为 Windows 防火墙设置了入站规则，VM 端端口 1521 也在 Azure VM 上打开。

我进行了大量搜索，但无法解决问题，而且我无法连接我的 SQL Developer。网络问题方面的专家能否阐明这一点？

【问题讨论】：

标签： oracle networking oracle-sqldeveloper azure-virtual-machine

【解决方案1】：

请将 1521 端口的优先级调低。在我们这边，我们将端口的优先级更改为较低的数字，这使得端口在我的 Azure Windows VM 端工作正常。优先级较低的端口效果更好。

更改优先级之前：

更改优先级后：

【讨论】：