How to Change DB Control Http Port.

1)Stop the dbconsole.

bash-3.00$ emctl stop dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.1.0
Copyright (c) 1996, 2005 Oracle Corporation. All rights reserved.
http://neptune:5500/em/console/aboutApplication
Stopping Oracle Enterprise Manager 10g Database Control ...
... Stopped.

2)Take a backup of files:

$ORACLE_HOME/host_sid/sysman/config/emoms.properties
$ORACLE_HOME/host_sid/sysman/config/emd.properties
$ORACLE_HOME/oc4j/j2ee/OC4J_DBConsole_host_sid/config/http-web-site.xml

3)Edit these three files. Suppose My hostname is neptune and sid is data1 . I edited following files.

In /oracle/app/oracle/product/10.2.0/db_1/neptune_data1/sysman/config/emoms.properties

oracle.sysman.emSDK.svlt.ConsoleServerPort=5510
oracle.sysman.emSDK.svlt.ConsoleServerHTTPSPort=5510

In /oracle/app/oracle/product/10.2.0/db_1/neptune_data1/sysman/config/emd.properties

REPOSITORY_URL=http://host.domain:5510/em/upload/
emdWalletSrcUrl=http://host.domain:5510/em/wallets/emd

In /oracle/app/oracle/product/10.2.0/db_1/oc4j/j2ee/OC4J_DBConsole_neptune_data1/config/http-web-site.xml