кроч,на sudo dhclient eth0 он мне вот чего сказал:
rko@Aurum:~$ sudo dhclient eth0
Internet Systems Consortium DHCP Client V3.1.3
Copyright 2004-2009 Internet Systems Consortium.
All rights reserved.
For info, please visit
https://www.isc.org/software/dhcp/Listening on LPF/eth0/00:22:15:3b:3e:f0
Sending on LPF/eth0/00:22:15:3b:3e:f0
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 11
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 10
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 15
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 18
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
rko@Aurum:~$
сейчас попробую создать дефолтные.