Slow connection to oracle 11g R2 database if no Internet connection

Hi all,
I've read some similar topics, but could not find a solution for my problem. I'm running Windows 7 Enterprise with a VMWare (Player) with a virtual Linux image on my machine (centos 5.4) in NAT connection mode. On the virtual machine I have installed an Oracle 11g R2 database. As long as I'm connected to Wi-FI or I'm plugged into my LAN network, I can access the database and run applications without a problem. But if I don't have an Internet connection, it's almost impossible to connect to the database or use certain applications.
Thanks in advance for your help !
Gianni
Below the settings on my virtual machine:
TNSNAMES.ora
LISTENER_ORCL =
(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))
ORCL =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = dmserver)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = orcl)
LISTENER.ora
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
(ADDRESS = (PROTOCOL = TCP)(HOST = dmserver)(PORT = 1521))
ADR_BASE_LISTENER = /usr/local/software/oracle
I also have a local loopback adaptor installed (below some info from my ifconfig):
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:9396 errors:0 dropped:0 overruns:0 frame:0
TX packets:9396 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:3047584 (2.9 MiB) TX bytes:3047584 (2.9 MiB)
Edited by: 939190 on Jun 7, 2012 2:04 AM

Solved it by commenting out my nameserver in resolv.conf and adding my hostname explicitely to the etc/hosts file in Linux. A good thread on this is: Oracle connection extremely slow(Oracle 11G on Linux RHEL4)

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