Linux 通过端口1521从sql developer连接到OracleVM virtualbox时出现问题

您好，我曾经在OracleVirtualBox中创建过一个oracle数据库，我正在尝试在同一个桌面上使用SQLDeveloper连接到它。我已经禁用了防火墙。任何帮助都将不胜感激

这是我的tnsnames.ora和listener.ora文件

# tnsnames.ora Network Configuration File: /u01/app/oracle/product/19.3.0.1/db_1/network/admin/tnsnames.ora
# Generated by Oracle configuration tools.

LISTENER_CDB1 =
  (ADDRESS = (PROTOCOL = TCP)(HOST = ol7-122.localdomain)(PORT = 1521))


CDB1 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = ol7-122.localdomain)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = cdb1)
    )
  )

[oracle@ol7-122 bin]$ cat /u01/app/oracle/product/19.3.0.1/db_1/network/admin/listener.ora 
# listener.ora Network Configuration File: /u01/app/oracle/product/19.3.0.1/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = ol7-122.localdomain)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

侦听器状态

LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 20-APR-2021 11:15:43

Copyright (c) 1991, 2016, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=ol7-122.localdomain)(PORT=1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 12.2.0.1.0 - Production
Start Date                19-APR-2021 13:17:15
Uptime                    0 days 21 hr. 58 min. 27 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /u01/app/oracle/product/19.3.0.1/db_1/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/ol7-122/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ol7-122.localdomain)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=ol7-122.localdomain)(PORT=5500))(Security=(my_wallet_directory=/u01/app/oracle/admin/cdb1/xdb_wallet))(Presentation=HTTP)(Session=RAW))
Services Summary...
Service "bfcef1c73c025a39e0536a38a8c0e70d" has 1 instance(s).
  Instance "cdb1", status READY, has 1 handler(s) for this service...
Service "cdb1" has 1 instance(s).
  Instance "cdb1", status READY, has 1 handler(s) for this service...
Service "cdb1XDB" has 1 instance(s).
  Instance "cdb1", status READY, has 1 handler(s) for this service...
Service "pdb1" has 1 instance(s).
  Instance "cdb1", status READY, has 1 handler(s) for this service...
The command completed successfully

oracle虚拟机中端口1521的netstat

tcp        0      0 192.168.56.106:27356    192.168.56.106:1521     ESTABLISHED
tcp6       0      0 :::1521                 :::*                    LISTEN     
tcp6       0      0 192.168.56.106:1521     192.168.56.106:27356    ESTABLISHED
unix  2      [ ACC ]     STREAM     LISTENING     51182    /var/tmp/.oracle/sEXTPROC1521

通过端口1521从windows到oracle虚拟机的远程登录

Connecting To 192.168.56.106...Could not open connection to the host, on port 1521: Connect failed

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您是如何配置VM的网络适配器的？如果virtualbox VM配置为使用NAT或NAT网络，则需要配置从主机到主机的端口转发VM@SayanMalakshinov-作为替代方案-我认为更好-我已经制造了数十台VBox机器，我总是像生产服务器一样构建和处理它们，生产服务器位于熄灯数据中心的一扇锁着的门后面。也就是说，我总是配置桥接适配器或仅主机适配器，并在与主机相同的子网中使用固定IP地址对其进行配置。在listener.ora和任何tnsname中引用的适配器的地址。ora@EdStevens是的，我同意，对于或多或少的持久性网络来说，这是一个不错的选择，但是，例如，我在我的工作笔记本电脑上使用它，即许多不同的WiFi网络，7个不同的VPN客户端（其中一些甚至与虚拟网络适配器冲突），我还使用了VMware和hyperv—在这种情况下，Nat网络更适合meI，因为它目前使用的是vbox主机专用适配器设置。