Changing database instance name

Hi,
I have oracle database 10g installed on linux.
and now we are aking the databas eto production leve to the www
do we need to change the oracle database name. is there any security reason for it, so outside doesn't need to know from the service name the location of the database. if we have to, then how to do it without affecting any existing processes.
or any other ways to secure the database identity.
any ways to give a alias to the ip address.
any suggestions please.
Thanks,
Philip.

The Oracle documentation contains a lot of security policies. In your case, you should be very cautious about firewall configuration and especially:
If Oracle Database is behind a firewall, then do not, under any circumstances, poke a hole through the firewall. For example, do not leave open port 1521 for Oracle Listener to make a connection to the Internet or vice versa.
Restrict the privileges of the listener, so that it cannot read or write files in the database or the Oracle server address space.
Harden the host operating system by disabling all unnecessary operating system services. Both UNIX and Windows platforms provide a variety of operating system services, most of which are not necessary for most deployments. Such services include FTP, TFTP, TELNET, and so forth. Be sure to close both the UDP and TCP ports for each service that is being disabled. Disabling one type of port and not the other does not make the operating system more secure.
(From http://download-uk.oracle.com/docs/cd/B19306_01/network.102/b14266/policies.htm#i1007433)

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We are working on a project to move the databases from legacy to new servers. The migration plan is to use Data Guard option for our migration strategy. We would like to know followings.
1) Is it possible to build stand by databases with same instance name of legacy primary instances? If so, how it could be?
2) If not, we can build stand by database with different instance name (DB_UNIQUE_NAME). Do the switch over and cut off the replication with legacy primary database. Once done, What other alternative do we have to change the instance name same like legacy database instances?
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Edited by: user12025125 on Feb 22, 2013 12:33 PM

Hello;
1) Is it possible to build stand by databases with same instance name of legacy primary instances? If so, how it could be?
Yes. Not sure I understand the second part of the question. I like to think of a standby database and a primary database as the same database in different modes. RMAN treats them as the same. They have the same DBID.
2) If not, we can build stand by database with different instance name (DB_UNIQUE_NAME). Do the switch over and cut off the replication with legacy primary database. Once done, What other alternative do we have to change the instance name same like legacy database instances?
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ernie =
(DESCRIPTION =
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       (ADDRESS = (PROTOCOL = TCP)(HOST = primary.server)(PORT = 1521))
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)Best Regards
mseberg

Changing database instance name

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