Oracle Database Express Edition (XE)

Hello
I have a rather annoying problem connecting to an XE instance AFTER I have disconnected from a VPN via a Cisco AnyConnect VPN Agent.

Sequence of operations:

- start Oracle XE and work normally
- connect to client's vpn
- do other stuff
- DISCONNECT from Client's VPN
-> unable to connect to XE service any more, unless I reboot

The problem does not happen with other vpn clients like Cisco VPN Service, Juniper, Checkpoint.

Details:

- sqlplus connection WITH service name (eg sqlplus user/pwd@XE): FAILURE with ORA-12170
- but...sqlplus connection WITHOUT service name (eg sqlplus user/pwd): SUCCESS (weird !)
- tnsping XE: TNS-12535 error
- lsnrctl status output (sorry, italian localized)

LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 22-GIU-2011 14:19
:38

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Connessione a (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATO del LISTENER
Alias LISTENER
Versione TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Produ
ction
Data di inizio 22-GIU-2011 12:26:15
Tempo di attivitÓ 0 giorni 1 ore 53 min. 22 sec.
Livello trace off
Sicurezza ON: Local OS Authentication
SNMP OFF
Servizio predefinito XE
File di parametri listenerC:\programs\oraclexe\app\oracle\product\10.2.0\server\
network\admin\listener.ora
File di log listener C:\programs\oraclexe\app\oracle\product\10.2.0\server\
network\log\listener.log
Summary table degli endpoint di ascolto...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=MyPCName)(PORT=8080))(Presentation=HTTP)(Session=RAW))
Summary table dei servizi...
Il servizio "CLRExtProc" ha 1 istanze.
L'istanza "CLRExtProc", stato UNKNOWN, ha 1 handler per questo servizio...
Il servizio "PLSExtProc" ha 1 istanze.
L'istanza "PLSExtProc", stato UNKNOWN, ha 1 handler per questo servizio...
Il servizio "XEXDB" ha 1 istanze.
L'istanza "xe", stato READY, ha 1 handler per questo servizio...
Il servizio "XE_XPT" ha 1 istanze.
L'istanza "xe", stato READY, ha 1 handler per questo servizio...
Il servizio "xe" ha 1 istanze.
L'istanza "xe", stato READY, ha 1 handler per questo servizio...

Environment:
Win7 Pro SP1
Oracle XE 10.2.0

I have stopped the Win firewall and the problem is still there, so it is not a firewall problem

listener.ora configuration
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\programs\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\programs\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = MyPCName)(PORT = 1521))
)
)

DEFAULT_SERVICE_LISTENER = (XE)

tnsnames.ora

XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = MyPCName)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)


Any help ?