[Bug 603001] [NEW] Guest with user net can't access external network when host has static IP

[Daniel White]

Public bug reported:

Binary package hint: qemu-kvm

I have a wireless network device, so bridging is completely out of the
question.  All I need is for external network access via user mode
networking for the guest machine.  I could connect to the host machine
through 10.0.2.2, but couldn't connect to any machines external to the
host.

Reconfiguring the host device, which is wireless, to use DHCP
immediately solved the problem.

I'm pretty sure this started happening after I upgraded from 9.10 to
10.04, but I can't be sure.  I usually have DHCP enabled, but there was
a period when I changed it to a static configuration.  The other
possible change is wireless devices.  I was using a card that used the
rt61pci driver but it has been particularly flaky.  Instead I'm
currently using a card that uses the ar9170usb driver.  I'm not entirely
certain whether this changes are related or whether this problem occured
before or after, so this could all be taken with a grain of salt.

qemu-kvm 0.12.3+noroms-0ubuntu9.2
libvirt-bin 0.7.5-5ubuntu27
libvirt0 0.7.5-5ubuntu2

Description:	Ubuntu 10.04 LTS
Release:	10.04

Linux 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010
x86_64 GNU/Linux

** Affects: qemu-kvm (Ubuntu)
     Importance: Undecided
         Status: New

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Guest with user net can't access external network when host has static IP
https://bugs.launchpad.net/bugs/603001
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