Failure establishing connection to debugger through sql developer

Question

i am trying to debug the procedure through debug option which i have in sqldeveloper. i am trying accessing the remote DB through client machine. my machine is accessing through VPN. and i am getting error as
Connecting to the database vtprod342@VTRMSD01.
Executing PL/SQL: ALTER SESSION SET PLSQL_DEBUG=TRUE
Executing PL/SQL: ALTER SESSION SET PLSQL_COMPILER_FLAGS=INTERPRETED
Executing PL/SQL: CALL DBMS_DEBUG_JDWP.CONNECT_TCP( '130.174.12.111', '4000' )
ORA-30683: failure establishing connection to debugger
ORA-12535: TNS:operation timed out
ORA-06512: at "SYS.DBMS_DEBUG_JDWP", line 68
ORA-06512: at line 1
Process exited.
Disconnecting from the database vtprod342@VTRMSD01.
and when i checked on my system ipconfig i am geeting as below, please let me know what is the ip and port i need to set..... "168.185.5.73" this is the my remote Database IP.
C:\Documents and Settings\selvaraj.v>ipconfig
Windows IP Configuration
Ethernet adapter Local Area Connection:
Connection-specific DNS Suffix . : corp.mphasis.com
IP Address. . . . . . . . . . . . : 172.20.34.16
Subnet Mask . . . . . . . . . . . : 255.255.255.192
Default Gateway . . . . . . . . . : 172.20.34.1
Ethernet adapter {9A1DB242-8CB4-4EA9-8415-5CA3D0001C5A}:
Connection-specific DNS Suffix . :
IP Address. . . . . . . . . . . . : 130.174.12.111
Subnet Mask . . . . . . . . . . . : 255.255.252.0
Default Gateway . . . . . . . . . :
Thanks in Advance

Answer 1

The database needs to be able to contact your PC, and I think your IP on the VPN is 172.20.34.16 rather than 130.174.12.111, correct?
If so, check Preferences - Debugger - Prompt for Debugger Host, initiate another debug session, and when prompted, give that IP instead. Once you had a successful debug session, I'm pretty sure you can uncheck the preference again.
If still no go, some firewall (PC or network) might be blocking the database from reaching your PC.
Hope that helps,
K.