Laravel 8连接Oracle数据库遇ORA-12170超时错误求助

尝试将基于PHP 7.4的Laravel 8项目连接至Oracle测试数据库，已完成listener.ora、tnsnames.ora文件配置，并更新.env文件填入测试库凭据，但运行php artisan serve时持续报错：ORA-12170: TNS:Connect timeout occurred。

现有配置信息 #

Instant Client配置（目录：/opt/oracle/instantclient_21_13） #

tnsnames.ora内容：

ORCL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.70.236.30)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = UWBSDBPROD)
    )
  )

listener.ora内容：

LISTENER =
  (ADDRESS_LIST=
    (ADDRESS=(PROTOCOL=tcp)(HOST=10.70.236.30)(PORT=1521))
    (ADDRESS=(PROTOCOL=ipc)(KEY=PNPKEY)))  
ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 10.70.236.30)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = UWBSDBPROD)
    )
  )

Laravel .env配置： #

DB_CONNECTION=oracle
DB_HOST=10.70.236.30
DB_PORT=1521
DB_DATABASE=database
DB_USERNAME=whatsappdb
DB_PASSWORD=whatsapp
DB_CHARSET=utf8
DB_COLLATION=utf8
DB_DEBUG=true

已尝试多日仍未找到解决办法，恳请协助排查该问题。

内容的提问来源于stack exchange，提问作者Vikram Vishvakarma