open SQL*Plus oder Toad, login to db using local user
enter sql statements:
connect sys/manager as sysdba;
call dbms_xdb.cfg_update(updateXML(
dbms_xdb.cfg_get()
, ‘/xdbconfig/sysconfig/protocolconfig/httpconfig/http-port/text()’
, 8081))
/
this runns the disturbing service on port 8081
!