SQL Developer

Hi

i have an oracle db on a virtualbox vm, using NAT networking strategy.
the vm is intalled on my machine.
i also configured port forwording for port 1521 to the vm.

i connect to the db via sql developer on my guest machine and every thing works fine.

i gave debug privileges to the "ciccio" user, but when i try debugging from sql developer i get:


Connecting to the database ciccio@pasticcio
Executing PL/SQL: ALTER SESSION SET PLSQL_DEBUG=TRUE
Executing PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( '127.0.0.1', '0' )
ORA-30683: failure establishing connection to debugger
ORA-12533: TNS:illegal ADDRESS parameters
ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68
ORA-06512: at line 1
Process exited.
Disconnecting from the database ciccio@pasticcio


do i need to set port forwarding for debug port too ?
which is the default debug port ?
can anyone help me ??


thanks