Cannot connect to database remotely (not even locally when using ip address) I can login using this command:
sqlplus test/test@127.0.0.1:1521/local
But not this one: (where 192.168.0.240) is my IP
sqlplus test/test@192.168.0.240:1521/local

I am absolutely sure that my ip address (server's adress) is 192.168.0.240. So why am I getting the following error? ORA-12541: TNS:no listener

I get a connection timeout when trying to connect from other computers.

lsnrctl statusgives me the following:

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC1521)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for 32-bit Windows: Version 11.2.0.1.0 - Produ
ction
Start Date                23-OCT-2013 15:27:35
Uptime                    0 days 21 hr. 37 min. 20 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   C:\app\pc2\product\11.2.0\dbhome_2\network\admin\liste
ner.ora
Listener Log File         c:\app\pc2\diag\tnslsnr\pc2-PC\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
  Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "local" has 1 instance(s).
  Instance "local", status READY, has 1 handler(s) for this service...
Service "localXDB" has 1 instance(s).
  Instance "local", status READY, has 1 handler(s) for this service...
The command completed successfully
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1521)))


You have the localhost ip in the listener.ora (127.0.0.1), change this or add another line with the NIC ip.