[SOLVED] Internet configuration: dynamic IP problems

Question

Hello Arch Linux community,
After usage of Ubuntu, I decided to move to Arch Linux because of its highly-customizable and flexible operating system. To learn first the installation process, I created a virtual OS in Oracle VM VirtualBox. The installation went well till I encountered the network configuration step. It should be noted that the internet worked fine in terminal when it was not installed and it was used from a disk image. Therefore, my installation ended here and I cannot progress. Tried many ways found on Arch's wiki and googled, but still no Internet found in the Arch Linux.
Firstly, I have a dynamic IP. Judging from ipconfig /all command in Windows cmd at least, since it says that DHCP is enabled. What is interesting is that I found that VirtualBox internet connection does not have it enabled in cmd. However, in the program it says that it is enabled. By googling I managed to turn it on and now it can be seen in cmd that it is on. But it did not fix my problem. When trying to write ping -c 3 www.google.com or ping -c 3 8.8.8.8, I get an error saying that it did not find the host, which according to Wiki means that I cannot establish an Internet connection.
By following this wikipedia section to configure a dynamic IP address, I managed to get rid off certain errors, but the Internet is still not reachable.
Errors
When I write dhcpcd eth0, I get:
dhcpcd[223]: dhcpcd already running on pid 217 (/run/dhcpcd-eth0.pid)
When I write systemctl start dhcpcd@eth0, I do not get anything.
When I write systemctl enable dhcpcd@eth0, I do not get anything.
When I write ping -c 3 www.google.com, I get:
ping: unknown host www.google.com
When I write ping -c 3 8.8.8.8, I get:
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
From 192.168.1.23 icmp_seq=1 Destination Host Unreachable
From 192.168.1.23 icmp_seq=2 Destination Host Unreachable
From 192.168.1.23 icmp_seq=3 Destination Host Unreachable
--- 8.8.8.8 ping statistics ---
3 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2002ms pipe 3
During the installation, I encountered problems with my firewall. Using Eset Smart Security, which is both an antivirus and a firewall. I had gotten a notification from my firewall that it is blocking some kind of IP. Then, I turned the firewall off and the installation went well. However, this does not work when I try to ping in the installed Arch Linux. I do not get any notifications from the firewall both when it is on and off.
System
Arch Linux is installed on HDD, however, I have also a SSD, but it is used by Windows 7.
When I write uname -a, I get this:
Linux localhost 3.6.6-1-ARCH #1 SMP PREEMPT Mon Nov 5 11:57:22 CET 2012 x86_64 GNU/Linux
Windows information:
Windows 7 Ultimate
Service Pack 1
Computer information
Laptop Dell XPS 1640
Inter Core 2 Duo CPU T9400 @ 2.53GHz 2.53GHz
Memory RAM: 4.00 GB
System type: 64-bit OS
Crucial M4 64GB SSD
And an old Seagate HDD 500GB on which Arch Linux is installed.
Last edited by decas (2012-12-16 09:32:09)

Answer 1

p0x8 wrote:- type of network adapter you configured in the virtual machine (bridged, NAT, host-only)
NAT (default)
p0x8 wrote:- output of the commands 'ip link' and 'ip addr'
ip link
ip addr
I hidden some addresses that might be needed to be kept private. Grey colour is a MAC address, red (only a part hidden) is an ip address, and pink do not know what is (looks like written in hex numbers).
p0x8 wrote:
- can you still access the internet when you boot the virtual machine using the installation ISO?*
* I ask this because you seem to have changed the VirtualBox network adapters settings in Windows, something I would strongly advise against unless you know what you are doing - which is obviously not the case.
Yes (3 packets sent, 1 lost, 2 received).
chris_l wrote:
No, I didn't mean to install it right away: you can boot the live cd and only configure internet on the live environment, without installing anything or messing with partitions. (your system will remain unchanged)
The porpouse is just to discard virtualbox as source of problem
I can access the Internet when I boot the live CD. However, I am not sure what you do mean saying to boot live cd without VB (it is probably, because you think the Internet is down also when the live CD is booted?).
It struck my mind that the provided Internet is controlled by a MAC address by my ISP. Wrote ipconfig /all to find out VB's internet connection, and added a second physical address to the list of MAC addresses on my ISP website. Did not help.
Last edited by decas (2012-12-14 20:05:38)