Close all ports but 1521 for Oracle 11g XE

Question

Hello,
After the Oracle 11g installation I tried to make all ports but 1521 visible only to localhost. Unfortunately I could not figure out if it's possible to close also this ones:
<pre>
<b> Port/Prot. Process</b>
<BR> 41293/tcp xe_d000_XE
<BR> 28085/udp xe_mmon_XE
</pre>
What are these processes doing? Is it possible/meaningful to configure the server so that they listen only on the localhost interface?
Thanks a lot.
Edited by: user6956341 on 05-Nov-2012 03:51

Answer 1

As mentioned earlier, on the dispatcher port ...
can be removed by clearing the Dispatchers parameteri.e. save the dispatchers and shared_servers parameters setting to enable it later ...
sqlplus /nolog
conn /as sysdba;
show parameter dispat
... dispatchers ... (PROTOCOL=TCP) (SERVICE=XEXDB)
show parameter shared_
... shared_servers ... 4
alter system reset dispatchers scope=spfile;
alter system reset shared_servers scope=spfile;
shutdown immediate;
startup;
And check lsnrctl services output. All dispatcher(s) and XEXDB items should be gone, as well as the d000 dispatcher process and the open TCP port.
But that breaks Apex, the web pages will no longer work since apex needs a couple shared server settings to handle http requests. So if you don't want Apex, clear dispatchers and shared_server parameters. Otherwise, dispatcher(s) need a TCP port and there's no way I'm aware of that can halt that behavior.