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I've a virtual machine on VirtualBox 4.1.4 with Ubuntu 11.04. It was working perfectly, but after a reboot something really wrong happened: I wasn't able to connect to the internal network (same for NAT).

$ sudo dhclient -v
Internet Systems Consortium DHCP Client 4.1.1-P1
Copyright 2004-2010 Internet System Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Error creating socket to list interfaces; Permission denied
Can't get list of interfaces.

The network interface is PCnet-FAST III.

Additional information:

$ uname -a
Linux LinuxFileServer 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux

Any ideas?

Thanks

EDIT:

$ sudo ifconfig -a
eth1      Link encap:Ethernet  HWaddr 08:00:27:af:f2:c7  
          indirizzo inet6: fe80::a00:27ff:feaf:f2c7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisioni:0 txqueuelen:1000 
          Byte RX:0 (0 B)  Byte TX:3870 (3.8 KB)
          Interrupt:10 

lo        Link encap:Loopback locale  
          indirizzo inet:127.0.0.1  Maschera:255.0.0.0
          indirizzo inet6: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:16 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
          collisioni:0 txqueuelen:0 
          Byte RX:960 (960.0 B)  Byte TX:960 (960.0 B)
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closed as off-topic by Ward, mdpc, womble Dec 13 '15 at 4:34

This question appears to be off-topic. The users who voted to close gave this specific reason:

If this question can be reworded to fit the rules in the help center, please edit the question.

    
Please show the output of sudo ifconfig -a on the guest. – Andrew Schulman Nov 3 '11 at 17:48
    
just edited the post – Sergio Nov 4 '11 at 18:29
up vote 0 down vote accepted

I've done some tests and I realized that the reason of this mess was that I installed LikeWise-Open from the LikeWise website (I needed the lastest version).

I don't know why, but this happens.

The solution was to change the Linux distribution.

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Try backing up your /etc/udev/rules.d/70-persistent-net.rules, then delete it, and reboot. This should reconfigure your network interfaces.

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it changed the name eth1->eth0. but the problem still there :( – Sergio Nov 5 '11 at 0:16

Is it possible that you upgraded your kernel, and some of the VirtualBox kernel modules haven't been rebuilt for the new kernel? On my host, I have

$ lsmod | grep vbox
vboxpci                15608  0
vboxnetadp              5838  0
vboxnetflt             16638  0
vboxdrv              1854398  3 vboxpci,vboxnetadp,vboxnetflt
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no, I have another Ubuntu 11.04 VM that works perfectly... O.O and I have the same lsmod | grep vbox output on the host (Ubuntu 10.10) – Sergio Nov 3 '11 at 17:41

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