Hi, sorry for reply delay.
I had done lspci (see attach text with lspci + ifconfig eth0 + pump + restarting network).
I must re-configure every time the ethernet card with IP.DNS and gateway (you can see in the attach text that the first time my ethernet card is not recognized, then it is necessary to rewrite the configuration!)

root@box:/home/edgardo# lspci
0000:00:00.0 Host bridge: VIA Technologies, Inc. VT8378 [KM400] Chipset Host Bridge
0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8235 PCI Bridge
0000:00:07.0 CardBus bridge: Texas Instruments PCI1410 PC card Cardbus Controller (rev 02)
0000:00:08.0 FireWire (IEEE 1394): Texas Instruments TSB43AB21 IEEE-1394a-2000 Controller (PHY/Link)
0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80)
0000:00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82)
0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge
0000:00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
0000:00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 50)
0000:00:11.6 Communication controller: VIA Technologies, Inc. Intel 537 [AC97 Modem] (rev 80)
0000:00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 74)
0000:01:00.0 VGA compatible controller: VIA Technologies, Inc. VT8378 [S3 UniChrome] Integrated Video (rev 01)
root@box:/home/edgardo#

root@box:/home/edgardo# ifconfig eth0 (****note: it is the first time, then it is necessary to rewrite the configuration!)
eth0 Link encap:UNSPEC HWaddr 00-C0-9F-00-00-10-2A-98-00-00-00-00-00-00-00-00
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:2 dropped:2 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

root@box:/home/edgardo#
eth0 Link encap:UNSPEC HWaddr 00-C0-9F-00-00-10-2A-98-00-00-00-00-00-00-00-00
inet addr:192.168.0.205 Bcast:192.168.0.205 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:2 dropped:2 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

root@box:/home/edgardo#
root@box:/home/edgardo# pump
Operation failed.
root@box:/home/edgardo#


root@box:/home/edgardo# /etc/init.d/networking restart
Setting up IP spoofing protection: rp_filter.
Reconfiguring network interfaces...done.
root@box:/home/edgardo#

Thanks a lot!

Edgardo