Connecting to Oracle database after reboot - oracle

Question

I am using Oracle 10g on a Windows machine, everything works fine and all, but after rebooting the machine, I started having a problem where I couldn't connect to the instance (ORA-12514), knowing that the listener service in On. When i disconnect from the internet, oddly enough, the issue corrects itself.
Does anybody have a clue on the roots of this problem?
Here is the content of my listener.ora file:
# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
)
)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = Localhost)(PORT = 1521))
)
)
EDIT:
When i try to connect to the host using telnet localhost 1521 it stays this way:
and when i try telnet and then o localhost 1521, it connects successfully.
When i change localhost to 127.0.0.1, the problem remains the same.
lsnrctl status gives me this result:

Answer 1

Change entry to 0.0.0.0 instead of Localhost as following:
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))
It's the simplest way to have listener linstening all interfaces.
EDIT: Also, you can use static listener registration such way:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(GLOBAL_DBNAME = YOURSID)
(ORACLE_HOME = C:\oracle\product\11.2.0\dbhome_1)
(SID_NAME = YOURSID)
)
)