Oracle服务端1521端口无法telnet,服务名未开启监听的解决

# 1:查看防火状态
systemctl status firewalld
service  iptables status
# 2:暂时关闭防火墙
systemctl stop firewalld
service  iptables stop
# 3:永久关闭防火墙
systemctl disable firewalld
chkconfig iptables off
# 4:重启防火墙
systemctl enable firewalld
service iptables restart  
# 5:永久关闭后重启
chkconfig iptables on

# 查看已打开的端口
netstat -anp
# 添加允许的端口
firewall-cmd --add-port=1521/tcp --permanent
# 若移除端口
firewall-cmd --permanent --remove-port=1521/tcp
# 策略修改完成，请重启： 
systemctl restart firewalld

# 关闭监听服务
lsnrctl stop
# 启动监听服务
lsnrctl start
# 查看监听服务状态
lsnrctl stat

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = CLRExtProc)
      (ORACLE_HOME = D:\app\niaobulashi\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\app\niaobulashi\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
	(SID_DESC=
	  (SID_NAME = ORCL)
      (ORACLE_HOME = D:\app\niaobulashi\product\11.2.0\dbhome_1)
      (PROGRAM = extproc)
      (ENVS = "EXTPROC_DLLS=ONLY:D:\app\niaobulashi\product\11.2.0\dbhome_1\bin\oraclr11.dll")
    )
  )
 
LISTENER =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = DESKTOP-NNDNCEI)(PORT = 1521))
  )
ADR_BASE_LISTENER = D:\app\niaobulashi

ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
    )
  )
 
LISTENER_ORCL =
  (ADDRESS = (PROTOCOL = TCP)(HOST = DESKTOP-NNDNCEI)(PORT = 1521))
 
ORCL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = DESKTOP-NNDNCEI)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = ORCL)
    )
  )