如果在安装配置EM过程中忘了配置的哪个端口，可以到这个目录下去找
C:\app\Administrator\product\11.1.0\db_1\sysman\config\emca.properties
DBCONTROL_HTTP_PORT_MIN=5500
DBCONTROL_HTTP_PORT_MAX=5519
# DB Control Http Port assigned by
IANA
DBCONTROL_HTTP_PORT_DEFAULT=1158
# RMI Port Ranges
RMI_PORT_MIN=5520
RMI_PORT_MAX=5539
# DB Control RMI Port assigned by IANA
RMI_PORT_DEFAULT=-1
# JMS Port Ranges
JMS_PORT_MIN=5540
JMS_PORT_MAX=5559