Getting Connection Time out while connecting and with tnsping

Hello Experts,
I am new to Oracle world, so please go easy on me.
I installed Oracle 11 XE on Centos 6.4 VM. followed the official installation procedure and database was installed without any errors.
I am able to login to database through sqlplus and able to run sql queries.
Problem comes when i am trying to connect from sql developer or external application. i get Connection Time out error.
Below are the tnsnames.ora and listener.ora file content
# tnsnames.ora Network Configuration File:
XE =
(DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = basevm)(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)
# listener.ora Network Configuration File:
SID_LIST_LISTENER =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /u01/app/oracle/product/11.2.0/xe)
      (PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
      (ADDRESS = (PROTOCOL = TCP)(HOST = basevm)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
lsnrctl stat shows service stats as UNKNOWN and tnsping also fails
bash-4.1$ lsnrctl stat
LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 11-JUN-2013 02:00:48
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.2.0 - Production
Start Date                10-JUN-2013 19:39:03
Uptime                    0 days 6 hr. 21 min. 45 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Default Service           XE
Listener Parameter File   /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
Listener Log File         /u01/app/oracle/diag/tnslsnr/sagbase/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=basevm)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
bash-4.1$ tnsping xe
TNS Ping Utility for Linux: Version 11.2.0.2.0 - Production on 11-JUN-2013 02:01:16
Copyright (c) 1997, 2011, Oracle. All rights reserved.
Used parameter files:
Used TNSNAMES adapter to resolve the alias
Attempting to contact (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = basevm)(PORT = 1521)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = XE)))
TNS-12535: TNS:operation timed out
I am stuck and don't know where else to check.
Could you guys please help me out here?
Thanks.

That tnsping error indicates several possible problems, most related to the setup for the client. Or network setup on the database server host.
Connecting to a database using sqlnet requires three things, the database host, the listener port, and the ORACLE_SID or instance SERVICE_NAME.
The tnsping utility is only concerned with the first two items, host and port. It will not perform an actual connection, and will not verify the tnsalias ORACLE_SID or SERVICE_NAME values.
An "OK" result from tnsping verifies that the specified host has a listener running at the specified port and it is servicing connections.
Since you're not getting an "OK" from tnsping, could be something is blocking the connection (i.e. firewall), the host= specification is not correct, or the port= spec is not correct. Note that host= must either be a valid and correct hostname, or a an IPv4 address. If IPv6 is in the mix, only the correct hostname will work. A hostname that resolves correctly.
Look at your network interface setup on the host, find its IP address, make sure the IP will `ping`, and try a new sqlnet.ora entry with the IPv4 address.
ifconfig -a
<interface>: flags=...
inet n.n.n.n
# in sqlnet.ora:
xe2 = ... host=n.n.n.n ...
tnsping xe2
... ok? ...

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