DNS trouble using qemu host

[Bill Davidsen]

Anotherone Foryou wrote:
> I've been attempting to install the latest Fedora 10 boot.iso and snapshots in two virtual machines, and am consistently running into a network problem. I'm using both VirtualBox 2.0.4 (Vista 64 host) and Qemu (Fedora 9 host) and I see the same problem in both environments. Both hosts have no network problem, and are running with disabled firewalls.
> 
> I've installed recent Ubuntu 8.10 betas, and these have to problems with net access, so I don't believe the problem is on the host side for the Vista nor the Fedora 9 machine.
> 
> I've disabled the guest Firewall (System->Administration->Firewall) and I've disabled SELinux (System->Administration->SELinux Management).
> 
> I'm starting the Fedora guest in qemu using:
> # qemu-kvm -hda fedora.img -m 768 -net nic -net user
> 
> The installed guest cannot access the network, it seems because it cannot do DNS lookups. The result is that I cannot browse the web nor use yum to download rpm packages.
> 
> In trying to find the problem, I've found I can ping the host computer:
> $ping 10.0.2.2
> PING 10.0.2.2 (10.0.2.2) 56(84) bytes of data.
> 64 bytes from 10.0.2.2: icmp_seq=1 ttl=255 time=0.196 ms
> ^C
> 
> but I can not ping the virtual machine host DNS server:
> $cat /etc/resolv.conf
> # Generated by NetworkManager
> nameserver 10.0.2.3
> 
> $ping 10.0.2.3
> ^C
> --- 10.0.2.3 ping statistics ---
> 24 packets transmitted, 0 received, 100% packet loss, time 23871ms
> 
> 
> I've tried restarting the Fedora 10 network:
> #/etc/init.d/network restart
> 
> but that did not help.
> 
> Any idea what I can do to get a functioning network connection?
> 
Leave all of the "-net" stuff off. You need to do more if you want to run a 
server in KVM, but for a more normal machine the defaults are fine. I'm writing 
this on a KVM VM, for instance.

-- 
Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot