www:oraclexe[XE]> sqlplus system@xe
SQL*Plus: Release  10 . 2 . 0 . 1 . 0  - on Sun Mar  19   22 : 20 : 36   2006 
Copyright (c)  1982 ,  2005 , Oracle.  All rights reserved.
Enter password:

Connected to:
Oracle Database 10g Express Edition Release  10 . 2 . 0 . 1 . 0 

SQL> exec dbms_xdb.setftpport('2100');

PL/SQL procedure successfully completed.

SQL> alter system register;

System altered.

SQL> select dbms_xdb.getftpport as "FTP-Port" from dual;

FTP-Port
----------
     2100 

SQL> exit

www:oraclexe[XE]> ftp localhost  2100 
Connected to localhost.localdomain.
 220 - www
Unauthorised use of this FTP server is prohibited and may 
be subject to civil and criminal prosecution.
 220  www FTP Server (Oracle XML DB/Oracle Database) ready.
Name (localhost:oraclexe): system
 331  pass required for SYSTEM
Password:
 230  SYSTEM logged in
Remote system type is Unix.
ftp> cd i/themes
 250  CWD Command successful