Installing SOA WebService Manager Config Assistent failed because of firewa

Question

When I install SOA Suite the first three steps (AS config, ESB Config, BPEL config) run fine
while the 4th failed with the following error (see below).
After fiddling around a while I figured out that my firewall prevents the successful
finishing of the 4th step. After I disabled the firewall the 4th step was successful executed.
So which port(s) do I have to open to run even the 4th step WITH ENABLED firewall ?
Is opening incoming TCP connections on port 1521 sufficient ?
output:
dataload.checkData:
[echo] Determining whether seed data is present.
[echo] uid=ORAWSM pw=oracle driv=oracle.jdbc.driver.OracleDriver url=jdbc:oracle:thin:@//localhost:1521/XE clpt=D:/soa/v10.1.3.1/OracleAS_1/owsm/lib/extlib/ojdbc14.jar
Error 1
BUILD FAILED
D:\soa\v10.1.3.1\OracleAS_1\owsm\scripts\install.xml:1971: The following error occurred while executing this line:
D:\soa\v10.1.3.1\OracleAS_1\owsm\scripts\dataload.xml:200: java.sql.SQLException: E/A-Exception: The Network Adapter could not establish the connection
Total time: 10 seconds
The configuration assistent "Oracle Web Services Manager-configuration assistent" was not executed successfully

Answer 1

Oh nevermind, i found it....
apparrently a wrong port was configured or so. I checked the settings, which can be found in .../owsm/bin/install.properties and somehow property install.db.port was set on 1531 (???) corrected it (to 1521) and the installation succeeded!